mirror of https://github.com/torvalds/linux.git
50087 Commits
| Author | SHA1 | Message | Date |
|---|---|---|---|
Linus Torvalds
|
a3ebb59eee |
VFIO updates for v6.19-rc1
- Move libvfio selftest artifacts in preparation of more tightly
coupled integration with KVM selftests. (David Matlack)
- Fix comment typo in mtty driver. (Chu Guangqing)
- Support for new hardware revision in the hisi_acc vfio-pci variant
driver where the migration registers can now be accessed via the PF.
When enabled for this support, the full BAR can be exposed to the
user. (Longfang Liu)
- Fix vfio cdev support for VF token passing, using the correct size
for the kernel structure, thereby actually allowing userspace to
provide a non-zero UUID token. Also set the match token callback for
the hisi_acc, fixing VF token support for this this vfio-pci variant
driver. (Raghavendra Rao Ananta)
- Introduce internal callbacks on vfio devices to simplify and
consolidate duplicate code for generating VFIO_DEVICE_GET_REGION_INFO
data, removing various ioctl intercepts with a more structured
solution. (Jason Gunthorpe)
- Introduce dma-buf support for vfio-pci devices, allowing MMIO regions
to be exposed through dma-buf objects with lifecycle managed through
move operations. This enables low-level interactions such as a
vfio-pci based SPDK drivers interacting directly with dma-buf capable
RDMA devices to enable peer-to-peer operations. IOMMUFD is also now
able to build upon this support to fill a long standing feature gap
versus the legacy vfio type1 IOMMU backend with an implementation of
P2P support for VM use cases that better manages the lifecycle of the
P2P mapping. (Leon Romanovsky, Jason Gunthorpe, Vivek Kasireddy)
- Convert eventfd triggering for error and request signals to use RCU
mechanisms in order to avoid a 3-way lockdep reported deadlock issue.
(Alex Williamson)
- Fix a 32-bit overflow introduced via dma-buf support manifesting with
large DMA buffers. (Alex Mastro)
- Convert nvgrace-gpu vfio-pci variant driver to insert mappings on
fault rather than at mmap time. This conversion serves both to make
use of huge PFNMAPs but also to both avoid corrected RAS events
during reset by now being subject to vfio-pci-core's use of
unmap_mapping_range(), and to enable a device readiness test after
reset. (Ankit Agrawal)
- Refactoring of vfio selftests to support multi-device tests and split
code to provide better separation between IOMMU and device objects.
This work also enables a new test suite addition to measure parallel
device initialization latency. (David Matlack)
-----BEGIN PGP SIGNATURE-----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=tpee
-----END PGP SIGNATURE-----
Merge tag 'vfio-v6.19-rc1' of https://github.com/awilliam/linux-vfio
Pull VFIO updates from Alex Williamson:
- Move libvfio selftest artifacts in preparation of more tightly
coupled integration with KVM selftests (David Matlack)
- Fix comment typo in mtty driver (Chu Guangqing)
- Support for new hardware revision in the hisi_acc vfio-pci variant
driver where the migration registers can now be accessed via the PF.
When enabled for this support, the full BAR can be exposed to the
user (Longfang Liu)
- Fix vfio cdev support for VF token passing, using the correct size
for the kernel structure, thereby actually allowing userspace to
provide a non-zero UUID token. Also set the match token callback for
the hisi_acc, fixing VF token support for this this vfio-pci variant
driver (Raghavendra Rao Ananta)
- Introduce internal callbacks on vfio devices to simplify and
consolidate duplicate code for generating VFIO_DEVICE_GET_REGION_INFO
data, removing various ioctl intercepts with a more structured
solution (Jason Gunthorpe)
- Introduce dma-buf support for vfio-pci devices, allowing MMIO regions
to be exposed through dma-buf objects with lifecycle managed through
move operations. This enables low-level interactions such as a
vfio-pci based SPDK drivers interacting directly with dma-buf capable
RDMA devices to enable peer-to-peer operations. IOMMUFD is also now
able to build upon this support to fill a long standing feature gap
versus the legacy vfio type1 IOMMU backend with an implementation of
P2P support for VM use cases that better manages the lifecycle of the
P2P mapping (Leon Romanovsky, Jason Gunthorpe, Vivek Kasireddy)
- Convert eventfd triggering for error and request signals to use RCU
mechanisms in order to avoid a 3-way lockdep reported deadlock issue
(Alex Williamson)
- Fix a 32-bit overflow introduced via dma-buf support manifesting with
large DMA buffers (Alex Mastro)
- Convert nvgrace-gpu vfio-pci variant driver to insert mappings on
fault rather than at mmap time. This conversion serves both to make
use of huge PFNMAPs but also to both avoid corrected RAS events
during reset by now being subject to vfio-pci-core's use of
unmap_mapping_range(), and to enable a device readiness test after
reset (Ankit Agrawal)
- Refactoring of vfio selftests to support multi-device tests and split
code to provide better separation between IOMMU and device objects.
This work also enables a new test suite addition to measure parallel
device initialization latency (David Matlack)
* tag 'vfio-v6.19-rc1' of https://github.com/awilliam/linux-vfio: (65 commits)
vfio: selftests: Add vfio_pci_device_init_perf_test
vfio: selftests: Eliminate INVALID_IOVA
vfio: selftests: Split libvfio.h into separate header files
vfio: selftests: Move vfio_selftests_*() helpers into libvfio.c
vfio: selftests: Rename vfio_util.h to libvfio.h
vfio: selftests: Stop passing device for IOMMU operations
vfio: selftests: Move IOVA allocator into iova_allocator.c
vfio: selftests: Move IOMMU library code into iommu.c
vfio: selftests: Rename struct vfio_dma_region to dma_region
vfio: selftests: Upgrade driver logging to dev_err()
vfio: selftests: Prefix logs with device BDF where relevant
vfio: selftests: Eliminate overly chatty logging
vfio: selftests: Support multiple devices in the same container/iommufd
vfio: selftests: Introduce struct iommu
vfio: selftests: Rename struct vfio_iommu_mode to iommu_mode
vfio: selftests: Allow passing multiple BDFs on the command line
vfio: selftests: Split run.sh into separate scripts
vfio: selftests: Move run.sh into scripts directory
vfio/nvgrace-gpu: wait for the GPU mem to be ready
vfio/nvgrace-gpu: Inform devmem unmapped after reset
...
|
|
|
Linus Torvalds
|
52206f82d9 |
pmdomain core:
- Allow power-off for out-of-band wakeup-capable devices - Drop the redundant call to dev_pm_domain_detach() for the amba bus - Extend the genpd governor for CPUs to account for IPIs pmdomain providers: - bcm: Add support for BCM2712 - mediatek: Add support for MFlexGraphics power domains - mediatek: Add support for MT8196 power domains - qcom: Add RPMh power domain support for Kaanapali - rockchip: Add support for RV1126B pmdomain consumers: - usb: dwc3: Enable out of band wakeup for i.MX95 - usb: chipidea: Enable out of band wakeup for i.MX95 -----BEGIN PGP SIGNATURE----- iQJLBAABCgA1FiEEugLDXPmKSktSkQsV/iaEJXNYjCkFAmkt1HYXHHVsZi5oYW5z c29uQGxpbmFyby5vcmcACgkQ/iaEJXNYjCk3PQ//W24ZdZ5cqXJASrw4YihTovbR Pk/cVBacua32r3uBAf+GKdhAXrC7zaPbohp4tou5tpuY6I54NDJ4mpaTLUr+iZ6A aiKGprBrNCNMU7Mu6Af23peQNo0t+0sdsxp3wjZAMcSK0/ioOnc2R+IZhjHI9dPh Us7Ke/Pa1DRu78T0P2quRvIIRPv5iGep2vL8LFkQtPNS4tAU5ZHTWghVip+Q0m7x 660WwZ5a9Bkzii/mqxFlXnXMnFjaJwi7zEPEKEMKd88cTjZXZGqScq8Ojfxto4Jx mdn9kPqwUR2QILTVKyBy2nJTeCB5nLvLhldi5/1nVxhqopN5ll4VwFx8CVsEPVTQ l76IUMzdAmztnVqs1p7qZ8dyFKdYztNRSESapumpu10/DIIOgWW4eLNk5Sk+7d0K 1fZDL/hWV2j4gnY0wSjGht2JQ2jhDBsgkxInxvQY2a8Ik91gwyUsD7r3mCq/YwaA 97GJHk9YO75jolFPy6PniXttzVuoJXPEcvgpBR3br1iFRQhSoGIEfFcDnZEaH9Sw m7nSc1Q99a6rsmq+WavB5JVPZBr2UkBhE6x+IU+MEBPwykjNj/1cZ7x4rtqzX666 eOn1FBDQ63CLEQl3hAPp1pxy3YB0nHcxKR9CPAZjECwZTfsYgJCrRNHyZb+yhPsU qKKXXMaOyyowoLraGbQ= =Fkue -----END PGP SIGNATURE----- Merge tag 'pmdomain-v6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/linux-pm Pull pmdomain updates from Ulf Hansson: "pmdomain core: - Allow power-off for out-of-band wakeup-capable devices - Drop the redundant call to dev_pm_domain_detach() for the amba bus - Extend the genpd governor for CPUs to account for IPIs pmdomain providers: - bcm: Add support for BCM2712 - mediatek: Add support for MFlexGraphics power domains - mediatek: Add support for MT8196 power domains - qcom: Add RPMh power domain support for Kaanapali - rockchip: Add support for RV1126B pmdomain consumers: - usb: dwc3: Enable out of band wakeup for i.MX95 - usb: chipidea: Enable out of band wakeup for i.MX95" * tag 'pmdomain-v6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/linux-pm: (26 commits) pmdomain: Extend the genpd governor for CPUs to account for IPIs smp: Introduce a helper function to check for pending IPIs pmdomain: mediatek: convert from clk round_rate() to determine_rate() amba: bus: Drop dev_pm_domain_detach() call pmdomain: bcm: bcm2835-power: Prepare to support BCM2712 pmdomain: mediatek: mtk-mfg: select MAILBOX in Kconfig pmdomain: mediatek: Add support for MFlexGraphics pmdomain: mediatek: Fix build-errors cpuidle: psci: Replace deprecated strcpy in psci_idle_init_cpu pmdomain: rockchip: Add support for RV1126B pmdomain: mediatek: Add support for MT8196 HFRPSYS power domains pmdomain: mediatek: Add support for MT8196 SCPSYS power domains pmdomain: mediatek: Add support for secure HWCCF infra power on pmdomain: mediatek: Add support for Hardware Voter power domains pmdomain: qcom: rpmhpd: Add RPMh power domain support for Kaanapali usb: dwc3: imx8mp: Set out of band wakeup for i.MX95 usb: chipidea: ci_hdrc_imx: Set out of band wakeup for i.MX95 usb: chipidea: core: detach power domain for ci_hdrc platform device pmdomain: core: Allow power-off for out-of-band wakeup-capable devices PM: wakeup: Add out-of-band system wakeup support for devices ... |
|
|
Linus Torvalds
|
6dfafbd029 |
drm-next for 6.19-rc1:
new driver:
- Arm Ethos-U65/U85 accel driver
core:
- support the drm color pipeline in vkms/amdgfx
- add support for drm colorop pipeline
- add COLOR PIPELINE plane property
- add DRM_CLIENT_CAP_PLANE_COLOR_PIPELINE
- throttle dirty worker with vblank
- use drm_for_each_bridge_in_chain_scoped in drm's bridge code
- Ensure drm_client_modeset tests are enabled in UML
- add simulated vblank interrupt - use in drivers
- dumb buffer sizing helper
- move freeing of drm client memory to driver
- crtc sharpness strength property
- stop using system_wq in scheduler/drivers
- support emergency restore in drm-client
rust:
- make slice::as_flattened usable on all supported rustc
- add FromBytes::from_bytes_prefix() method
- remove redundant device ptr from Rust GEM object
- Change how AlwaysRefCounted is implemented for GEM objects
gpuvm:
- Add deferred vm_bo cleanup to GPUVM (for rust)
atomic:
- cleanup and improve state handling interfaces
buddy:
- optimize block management
dma-buf:
- heaps: Create heap per CMA reserved location
- improve userspace documentation
dp:
- add POST_LT_ADJ_REQ training sequence
- DPCD dSC quirk for synaptics panamera devices
- helpers to query branch DSC max throughput
ttm:
- Rename ttm_bo_put to ttm_bo_fini
- allow page protection flags on risc-v
- rework pipelined eviction fence handling
amdgpu:
- enable amdgpu by default for SI/CI dGPUs
- enable DC by default on SI
- refactor CIK/SI enablement
- add ABM KMS property
- Re-enable DM idle optimizations
- DC Analog encoders support
- Powerplay fixes for fiji/iceland
- Enable DC on bonaire by default
- HMM cleanup
- Add new RAS framework
- DML2.1 updates
- YCbCr420 fixes
- DC FP fixes
- DMUB fixes
- LTTPR fixes
- DTBCLK fixes
- DMU cursor offload handling
- Userq validation improvements
- Unify shutdown callback handling
- Suspend improvements
- Power limit code cleanup
- SR-IOV fixes
- AUX backlight fixes
- DCN 3.5 fixes
- HDMI compliance fixes
- DCN 4.0.1 cursor updates
- DCN interrupt fix
- DC KMS full update improvements
- Add additional HDCP traces
- DCN 3.2 fixes
- DP MST fixes
- Add support for new SR-IOV mailbox interface
- UQ reset support
- HDP flush rework
- VCE1 support
amdkfd:
- HMM cleanups
- Relax checks on save area overallocations
- Fix GPU mappings after prefetch
radeon:
- refactor CIK/SI enablement.
xe:
- Initial Xe3P support
- panic support on VRAM for display
- fix stolen size check
- Loosen used tracking restriction
- New SR-IOV debugfs structure and debugfs updates
- Hide the GPU madvise flag behind a VM_BIND flag
- Always expose VRAM provisioning data on discrete GPUs
- Allow VRAM mappings for userptr when used with SVM
- Allow pinning of p2p dma-buf
- Use per-tile debugfs where appropriate
- Add documentation for Execution Queues
- PF improvements
- VF migration recovery redesign work
- User / Kernel VRAM partitioning
- Update Tile-based messages
- Allow configfs to disable specific GT types
- VF provisioning and migration improvements
- use SVM range helpers in PT layer
- Initial CRI support
- access VF registers using dedicated MMIO view
- limit number of jobs per exec queue
- add sriov_admin sysfs tree
- more crescent island specific support
- debugfs residency counter
- SRIOV migration work
- runtime registers for GFX 35
i915:
- add initial Xe3p_LPD display version 35 support
- Enable LNL+ content adaptive sharpness filter
- Use optimized VRR guardband
- Enable Xe3p LT PHY
- enable FBC support for Xe3p_LPD display
- add display 30.02 firmware support
- refactor SKL+ watermark latency setup
- refactor fbdev handling
- call i915/xe runtime PM via function pointers
- refactor i915/xe stolen memory/display interfaces
- use display version instead of gfx version in display code
- extend i915_display_info with Type-C port details
- lots of display cleanups/refactorings
- set O_LARGEFILE in __create_shmem
- skuip guc communication warning on reset
- fix time conversions
- defeature DRRS on LNL+
- refactor intel_frontbuffer split between i915/xe/display
- convert inteL_rom interfaces to struct drm_device
- unify display register polling interfaces
- aovid lock inversion when pinning to GGTT on CHV/BXT+VTD
panel:
- Add KD116N3730A08/A12, chromebook mt8189
- JT101TM023, LQ079L1SX01,
- GLD070WX3-SL01 MIPI DSI
- Samsung LTL106AL0, Samsung LTL106AL01
- Raystar RFF500F-AWH-DNN
- Winstar WF70A8SYJHLNGA,
- Wanchanglong w552946aaa
- Samsung SOFEF00
- Lenovo X13s panel.
- ilitek-ili9881c : add rpi 5" support
- visionx-rm69299 - add backlight support
- edp - support AUI B116XAN02.0
bridge:
- improve ref counting
- ti-sn65dsi86 - add support for DP mode with HPD
- synopsis: support CEC, init timer with correct freq
- ASL CS5263 DP-to-HDMI bridge support
nova-core:
- introduce bitfield! macro
- introduce safe integer converters
- GSP inits to fully booted state on Ampere
- Use more future-proof register for GPU identification
nova-drm:
- select NOVA_CORE
- 64-bit only
nouveau:
- improve reclocking on tegra 186+
- add large page and compression support
msm:
- GPU:
- Gen8 support: A840 (Kaanapali) and X2-85 (Glymur)
- A612 support
- MDSS:
- Added support for Glymur and QCS8300 platforms
- DPU:
- Enabled Quad-Pipe support, unlocking higher resolutions support
- Added support for Glymur platform
- Documented DPU on QCS8300 platform as supported
- DisplayPort:
- Added support for Glymur platform
- Added support lame remapping inside DP block
- Documented DisplayPort controller on QCS8300 and SM6150/QCS615 as
supported
tegra:
- NVJPG driver
panfrost:
- display JM contexts over debugfs
- export JM contexts to userspace
- improve error and job handling
panthor:
- support custom ASN_HASH for mt8196
- support mali-G1 GPU
- flush shmem write before mapping buffers uncached
- make timeout per-queue instead of per-job
mediatek:
- MT8195/88 HDMIv2/DDCv2 support
rockchip:
- dsi: add support for RK3368
amdxdna:
- enhance runtime PM
- last hardware error reading uapi
- support firmware debug output
- add resource and telemetry data uapi
- preemption support
imx:
- add driver for HDMI TX Parallel audio interface
ivpu:
- add support for user-managed preemption buffer
- add userptr support
- update JSM firware API to 3.33.0
- add better alloc/free warnings
- fix page fault in unbind all bos
- rework bind/unbind of imported buffers
- enable MCA ECC signalling
- split fw runtime and global memory buffers
- add fdinfo memory statistics
tidss:
- convert to drm logging
- logging cleanup
ast:
- refactor generation init paths
- add per chip generation detect_tx_chip
- set quirks for each chip model
atmel-hlcdc:
- set LCDC_ATTRE register in plane disable
- set correct values for plane scaler
solomon:
- use drm helper for get_modes and move_valid
sitronix:
- fix output position when clearing screens
qaic:
- support dma-buf exports
- support new firmware's READ_DATA implementation
- sahara AIC200 image table update
- add sysfs support
- add coredump support
- add uevents support
- PM support
sun4i:
- layer refactors to decouple plane from output
- improve DE33 support
vc4:
- switch to generic CEC helpers
komeda:
- use drm_ logging functions
vkms:
- configfs support for display configuration
vgem:
- fix fence timer deadlock
etnaviv:
- add HWDB entry for GC8000 Nano Ultra VIP r6205
-----BEGIN PGP SIGNATURE-----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=gpnQ
-----END PGP SIGNATURE-----
Merge tag 'drm-next-2025-12-03' of https://gitlab.freedesktop.org/drm/kernel
Pull drm updates from Dave Airlie:
"There was a rather late merge of a new color pipeline feature, that
some userspace projects are blocked on, and has seen a lot of work in
amdgpu. This should have seen some time in -next. There is additional
support for this for Intel, that if it arrives in the next day or two
I'll pass it on in another pull request and you can decide if you want
to take it.
Highlights:
- Arm Ethos NPU accelerator driver
- new DRM color pipeline support
- amdgpu will now run discrete SI/CIK cards instead of radeon, which
enables vulkan support in userspace
- msm gets gen8 gpu support
- initial Xe3P support in xe
Full detail summary:
New driver:
- Arm Ethos-U65/U85 accel driver
Core:
- support the drm color pipeline in vkms/amdgfx
- add support for drm colorop pipeline
- add COLOR PIPELINE plane property
- add DRM_CLIENT_CAP_PLANE_COLOR_PIPELINE
- throttle dirty worker with vblank
- use drm_for_each_bridge_in_chain_scoped in drm's bridge code
- Ensure drm_client_modeset tests are enabled in UML
- add simulated vblank interrupt - use in drivers
- dumb buffer sizing helper
- move freeing of drm client memory to driver
- crtc sharpness strength property
- stop using system_wq in scheduler/drivers
- support emergency restore in drm-client
Rust:
- make slice::as_flattened usable on all supported rustc
- add FromBytes::from_bytes_prefix() method
- remove redundant device ptr from Rust GEM object
- Change how AlwaysRefCounted is implemented for GEM objects
gpuvm:
- Add deferred vm_bo cleanup to GPUVM (for rust)
atomic:
- cleanup and improve state handling interfaces
buddy:
- optimize block management
dma-buf:
- heaps: Create heap per CMA reserved location
- improve userspace documentation
dp:
- add POST_LT_ADJ_REQ training sequence
- DPCD dSC quirk for synaptics panamera devices
- helpers to query branch DSC max throughput
ttm:
- Rename ttm_bo_put to ttm_bo_fini
- allow page protection flags on risc-v
- rework pipelined eviction fence handling
amdgpu:
- enable amdgpu by default for SI/CI dGPUs
- enable DC by default on SI
- refactor CIK/SI enablement
- add ABM KMS property
- Re-enable DM idle optimizations
- DC Analog encoders support
- Powerplay fixes for fiji/iceland
- Enable DC on bonaire by default
- HMM cleanup
- Add new RAS framework
- DML2.1 updates
- YCbCr420 fixes
- DC FP fixes
- DMUB fixes
- LTTPR fixes
- DTBCLK fixes
- DMU cursor offload handling
- Userq validation improvements
- Unify shutdown callback handling
- Suspend improvements
- Power limit code cleanup
- SR-IOV fixes
- AUX backlight fixes
- DCN 3.5 fixes
- HDMI compliance fixes
- DCN 4.0.1 cursor updates
- DCN interrupt fix
- DC KMS full update improvements
- Add additional HDCP traces
- DCN 3.2 fixes
- DP MST fixes
- Add support for new SR-IOV mailbox interface
- UQ reset support
- HDP flush rework
- VCE1 support
amdkfd:
- HMM cleanups
- Relax checks on save area overallocations
- Fix GPU mappings after prefetch
radeon:
- refactor CIK/SI enablement
xe:
- Initial Xe3P support
- panic support on VRAM for display
- fix stolen size check
- Loosen used tracking restriction
- New SR-IOV debugfs structure and debugfs updates
- Hide the GPU madvise flag behind a VM_BIND flag
- Always expose VRAM provisioning data on discrete GPUs
- Allow VRAM mappings for userptr when used with SVM
- Allow pinning of p2p dma-buf
- Use per-tile debugfs where appropriate
- Add documentation for Execution Queues
- PF improvements
- VF migration recovery redesign work
- User / Kernel VRAM partitioning
- Update Tile-based messages
- Allow configfs to disable specific GT types
- VF provisioning and migration improvements
- use SVM range helpers in PT layer
- Initial CRI support
- access VF registers using dedicated MMIO view
- limit number of jobs per exec queue
- add sriov_admin sysfs tree
- more crescent island specific support
- debugfs residency counter
- SRIOV migration work
- runtime registers for GFX 35
i915:
- add initial Xe3p_LPD display version 35 support
- Enable LNL+ content adaptive sharpness filter
- Use optimized VRR guardband
- Enable Xe3p LT PHY
- enable FBC support for Xe3p_LPD display
- add display 30.02 firmware support
- refactor SKL+ watermark latency setup
- refactor fbdev handling
- call i915/xe runtime PM via function pointers
- refactor i915/xe stolen memory/display interfaces
- use display version instead of gfx version in display code
- extend i915_display_info with Type-C port details
- lots of display cleanups/refactorings
- set O_LARGEFILE in __create_shmem
- skuip guc communication warning on reset
- fix time conversions
- defeature DRRS on LNL+
- refactor intel_frontbuffer split between i915/xe/display
- convert inteL_rom interfaces to struct drm_device
- unify display register polling interfaces
- aovid lock inversion when pinning to GGTT on CHV/BXT+VTD
panel:
- Add KD116N3730A08/A12, chromebook mt8189
- JT101TM023, LQ079L1SX01,
- GLD070WX3-SL01 MIPI DSI
- Samsung LTL106AL0, Samsung LTL106AL01
- Raystar RFF500F-AWH-DNN
- Winstar WF70A8SYJHLNGA
- Wanchanglong w552946aaa
- Samsung SOFEF00
- Lenovo X13s panel
- ilitek-ili9881c - add rpi 5" support
- visionx-rm69299 - add backlight support
- edp - support AUI B116XAN02.0
bridge:
- improve ref counting
- ti-sn65dsi86 - add support for DP mode with HPD
- synopsis: support CEC, init timer with correct freq
- ASL CS5263 DP-to-HDMI bridge support
nova-core:
- introduce bitfield! macro
- introduce safe integer converters
- GSP inits to fully booted state on Ampere
- Use more future-proof register for GPU identification
nova-drm:
- select NOVA_CORE
- 64-bit only
nouveau:
- improve reclocking on tegra 186+
- add large page and compression support
msm:
- GPU:
- Gen8 support: A840 (Kaanapali) and X2-85 (Glymur)
- A612 support
- MDSS:
- Added support for Glymur and QCS8300 platforms
- DPU:
- Enabled Quad-Pipe support, unlocking higher resolutions support
- Added support for Glymur platform
- Documented DPU on QCS8300 platform as supported
- DisplayPort:
- Added support for Glymur platform
- Added support lame remapping inside DP block
- Documented DisplayPort controller on QCS8300 and SM6150/QCS615
as supported
tegra:
- NVJPG driver
panfrost:
- display JM contexts over debugfs
- export JM contexts to userspace
- improve error and job handling
panthor:
- support custom ASN_HASH for mt8196
- support mali-G1 GPU
- flush shmem write before mapping buffers uncached
- make timeout per-queue instead of per-job
mediatek:
- MT8195/88 HDMIv2/DDCv2 support
rockchip:
- dsi: add support for RK3368
amdxdna:
- enhance runtime PM
- last hardware error reading uapi
- support firmware debug output
- add resource and telemetry data uapi
- preemption support
imx:
- add driver for HDMI TX Parallel audio interface
ivpu:
- add support for user-managed preemption buffer
- add userptr support
- update JSM firware API to 3.33.0
- add better alloc/free warnings
- fix page fault in unbind all bos
- rework bind/unbind of imported buffers
- enable MCA ECC signalling
- split fw runtime and global memory buffers
- add fdinfo memory statistics
tidss:
- convert to drm logging
- logging cleanup
ast:
- refactor generation init paths
- add per chip generation detect_tx_chip
- set quirks for each chip model
atmel-hlcdc:
- set LCDC_ATTRE register in plane disable
- set correct values for plane scaler
solomon:
- use drm helper for get_modes and move_valid
sitronix:
- fix output position when clearing screens
qaic:
- support dma-buf exports
- support new firmware's READ_DATA implementation
- sahara AIC200 image table update
- add sysfs support
- add coredump support
- add uevents support
- PM support
sun4i:
- layer refactors to decouple plane from output
- improve DE33 support
vc4:
- switch to generic CEC helpers
komeda:
- use drm_ logging functions
vkms:
- configfs support for display configuration
vgem:
- fix fence timer deadlock
etnaviv:
- add HWDB entry for GC8000 Nano Ultra VIP r6205"
* tag 'drm-next-2025-12-03' of https://gitlab.freedesktop.org/drm/kernel: (1869 commits)
Revert "drm/amd: Skip power ungate during suspend for VPE"
drm/amdgpu: use common defines for HUB faults
drm/amdgpu/gmc12: add amdgpu_vm_handle_fault() handling
drm/amdgpu/gmc11: add amdgpu_vm_handle_fault() handling
drm/amdgpu: use static ids for ACP platform devs
drm/amdgpu/sdma6: Update SDMA 6.0.3 FW version to include UMQ protected-fence fix
drm/amdgpu: Forward VMID reservation errors
drm/amdgpu/gmc8: Delegate VM faults to soft IRQ handler ring
drm/amdgpu/gmc7: Delegate VM faults to soft IRQ handler ring
drm/amdgpu/gmc6: Delegate VM faults to soft IRQ handler ring
drm/amdgpu/gmc6: Cache VM fault info
drm/amdgpu/gmc6: Don't print MC client as it's unknown
drm/amdgpu/cz_ih: Enable soft IRQ handler ring
drm/amdgpu/tonga_ih: Enable soft IRQ handler ring
drm/amdgpu/iceland_ih: Enable soft IRQ handler ring
drm/amdgpu/cik_ih: Enable soft IRQ handler ring
drm/amdgpu/si_ih: Enable soft IRQ handler ring
drm/amd/display: fix typo in display_mode_core_structs.h
drm/amd/display: fix Smart Power OLED not working after S4
drm/amd/display: Move RGB-type check for audio sync to DCE HW sequence
...
|
|
|
Linus Torvalds
|
cc25df3e2e |
for-6.19/block-20251201
-----BEGIN PGP SIGNATURE-----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=m22w
-----END PGP SIGNATURE-----
Merge tag 'for-6.19/block-20251201' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux
Pull block updates from Jens Axboe:
- Fix head insertion for mq-deadline, a regression from when priority
support was added
- Series simplifying and improving the ublk user copy code
- Various ublk related cleanups
- Fixup REQ_NOWAIT handling in loop/zloop, clearing NOWAIT when the
request is punted to a thread for handling
- Merge and then later revert loop dio nowait support, as it ended up
causing excessive stack usage for when the inline issue code needs to
dip back into the full file system code
- Improve auto integrity code, making it less deadlock prone
- Speedup polled IO handling, but manually managing the hctx lookups
- Fixes for blk-throttle for SSD devices
- Small series with fixes for the S390 dasd driver
- Add support for caching zones, avoiding unnecessary report zone
queries
- MD pull requests via Yu:
- fix null-ptr-dereference regression for dm-raid0
- fix IO hang for raid5 when array is broken with IO inflight
- remove legacy 1s delay to speed up system shutdown
- change maintainer's email address
- data can be lost if array is created with different lbs devices,
fix this problem and record lbs of the array in metadata
- fix rcu protection for md_thread
- fix mddev kobject lifetime regression
- enable atomic writes for md-linear
- some cleanups
- bcache updates via Coly
- remove useless discard and cache device code
- improve usage of per-cpu workqueues
- Reorganize the IO scheduler switching code, fixing some lockdep
reports as well
- Improve the block layer P2P DMA support
- Add support to the block tracing code for zoned devices
- Segment calculation improves, and memory alignment flexibility
improvements
- Set of prep and cleanups patches for ublk batching support. The
actual batching hasn't been added yet, but helps shrink down the
workload of getting that patchset ready for 6.20
- Fix for how the ps3 block driver handles segments offsets
- Improve how block plugging handles batch tag allocations
- nbd fixes for use-after-free of the configuration on device clear/put
- Set of improvements and fixes for zloop
- Add Damien as maintainer of the block zoned device code handling
- Various other fixes and cleanups
* tag 'for-6.19/block-20251201' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux: (162 commits)
block/rnbd: correct all kernel-doc complaints
blk-mq: use queue_hctx in blk_mq_map_queue_type
md: remove legacy 1s delay in md_notify_reboot
md/raid5: fix IO hang when array is broken with IO inflight
md: warn about updating super block failure
md/raid0: fix NULL pointer dereference in create_strip_zones() for dm-raid
sbitmap: fix all kernel-doc warnings
ublk: add helper of __ublk_fetch()
ublk: pass const pointer to ublk_queue_is_zoned()
ublk: refactor auto buffer register in ublk_dispatch_req()
ublk: add `union ublk_io_buf` with improved naming
ublk: add parameter `struct io_uring_cmd *` to ublk_prep_auto_buf_reg()
kfifo: add kfifo_alloc_node() helper for NUMA awareness
blk-mq: fix potential uaf for 'queue_hw_ctx'
blk-mq: use array manage hctx map instead of xarray
ublk: prevent invalid access with DEBUG
s390/dasd: Use scnprintf() instead of sprintf()
s390/dasd: Move device name formatting into separate function
s390/dasd: Remove unnecessary debugfs_create() return checks
s390/dasd: Fix gendisk parent after copy pair swap
...
|
|
|
Linus Torvalds
|
8f7aa3d3c7 |
Networking changes for 6.19.
Core & protocols
----------------
- Replace busylock at the Tx queuing layer with a lockless list. Resulting
in a 300% (4x) improvement on heavy TX workloads, sending twice the
number of packets per second, for half the cpu cycles.
- Allow constantly busy flows to migrate to a more suitable CPU/NIC
queue. Normally we perform queue re-selection when flow comes out
of idle, but under extreme circumstances the flows may be constantly
busy. Add sysctl to allow periodic rehashing even if it'd risk packet
reordering.
- Optimize the NAPI skb cache, make it larger, use it in more paths.
- Attempt returning Tx skbs to the originating CPU (like we already did
for Rx skbs).
- Various data structure layout and prefetch optimizations from Eric.
- Remove ktime_get() from the recvmsg() fast path, ktime_get() is sadly
quite expensive on recent AMD machines.
- Extend threaded NAPI polling to allow the kthread busy poll for packets.
- Make MPTCP use Rx backlog processing. This lowers the lock pressure,
improving the Rx performance.
- Support memcg accounting of MPTCP socket memory.
- Allow admin to opt sockets out of global protocol memory accounting
(using a sysctl or BPF-based policy). The global limits are a poor fit
for modern container workloads, where limits are imposed using cgroups.
- Improve heuristics for when to kick off AF_UNIX garbage collection.
- Allow users to control TCP SACK compression, and default to 33% of RTT.
- Add tcp_rcvbuf_low_rtt sysctl to let datacenter users avoid unnecessarily
aggressive rcvbuf growth and overshot when the connection RTT is low.
- Preserve skb metadata space across skb_push / skb_pull operations.
- Support for IPIP encapsulation in the nftables flowtable offload.
- Support appending IP interface information to ICMP messages (RFC 5837).
- Support setting max record size in TLS (RFC 8449).
- Remove taking rtnl_lock from RTM_GETNEIGHTBL and RTM_SETNEIGHTBL.
- Use a dedicated lock (and RCU) in MPLS, instead of rtnl_lock.
- Let users configure the number of write buffers in SMC.
- Add new struct sockaddr_unsized for sockaddr of unknown length,
from Kees.
- Some conversions away from the crypto_ahash API, from Eric Biggers.
- Some preparations for slimming down struct page.
- YAML Netlink protocol spec for WireGuard.
- Add a tool on top of YAML Netlink specs/lib for reporting commonly
computed derived statistics and summarized system state.
Driver API
----------
- Add CAN XL support to the CAN Netlink interface.
- Add uAPI for reporting PHY Mean Square Error (MSE) diagnostics,
as defined by the OPEN Alliance's "Advanced diagnostic features
for 100BASE-T1 automotive Ethernet PHYs" specification.
- Add DPLL phase-adjust-gran pin attribute (and implement it in zl3073x).
- Refactor xfrm_input lock to reduce contention when NIC offloads IPsec
and performs RSS.
- Add info to devlink params whether the current setting is the default
or a user override. Allow resetting back to default.
- Add standard device stats for PSP crypto offload.
- Leverage DSA frame broadcast to implement simple HSR frame duplication
for a lot of switches without dedicated HSR offload.
- Add uAPI defines for 1.6Tbps link modes.
Device drivers
--------------
- Add Motorcomm YT921x gigabit Ethernet switch support.
- Add MUCSE driver for N500/N210 1GbE NIC series.
- Convert drivers to support dedicated ops for timestamping control,
and away from the direct IOCTL handling. While at it support GET
operations for PHY timestamping.
- Add (and convert most drivers to) a dedicated ethtool callback
for reading the Rx ring count.
- Significant refactoring efforts in the STMMAC driver, which supports
Synopsys turn-key MAC IP integrated into a ton of SoCs.
- Ethernet high-speed NICs:
- Broadcom (bnxt):
- support PPS in/out on all pins
- Intel (100G, ice, idpf):
- ice: implement standard ethtool and timestamping stats
- i40e: support setting the max number of MAC addresses per VF
- iavf: support RSS of GTP tunnels for 5G and LTE deployments
- nVidia/Mellanox (mlx5):
- reduce downtime on interface reconfiguration
- disable being an XDP redirect target by default (same as other
drivers) to avoid wasting resources if feature is unused
- Meta (fbnic):
- add support for Linux-managed PCS on 25G, 50G, and 100G links
- Wangxun:
- support Rx descriptor merge, and Tx head writeback
- support Rx coalescing offload
- support 25G SPF and 40G QSFP modules
- Ethernet virtual:
- Google (gve):
- allow ethtool to configure rx_buf_len
- implement XDP HW RX Timestamping support for DQ descriptor format
- Microsoft vNIC (mana):
- support HW link state events
- handle hardware recovery events when probing the device
- Ethernet NICs consumer, and embedded:
- usbnet: add support for Byte Queue Limits (BQL)
- AMD (amd-xgbe):
- add device selftests
- NXP (enetc):
- add i.MX94 support
- Broadcom integrated MACs (bcmgenet, bcmasp):
- bcmasp: add support for PHY-based Wake-on-LAN
- Broadcom switches (b53):
- support port isolation
- support BCM5389/97/98 and BCM63XX ARL formats
- Lantiq/MaxLinear switches:
- support bridge FDB entries on the CPU port
- use regmap for register access
- allow user to enable/disable learning
- support Energy Efficient Ethernet
- support configuring RMII clock delays
- add tagging driver for MaxLinear GSW1xx switches
- Synopsys (stmmac):
- support using the HW clock in free running mode
- add Eswin EIC7700 support
- add Rockchip RK3506 support
- add Altera Agilex5 support
- Cadence (macb):
- cleanup and consolidate descriptor and DMA address handling
- add EyeQ5 support
- TI:
- icssg-prueth: support AF_XDP
- Airoha access points:
- add missing Ethernet stats and link state callback
- add AN7583 support
- support out-of-order Tx completion processing
- Power over Ethernet:
- pd692x0: preserve PSE configuration across reboots
- add support for TPS23881B devices
- Ethernet PHYs:
- Open Alliance OATC14 10BASE-T1S PHY cable diagnostic support
- Support 50G SerDes and 100G interfaces in Linux-managed PHYs
- micrel:
- support for non PTP SKUs of lan8814
- enable in-band auto-negotiation on lan8814
- realtek:
- cable testing support on RTL8224
- interrupt support on RTL8221B
- motorcomm: support for PHY LEDs on YT853
- microchip: support for LAN867X Rev.D0 PHYs w/ SQI and cable diag
- mscc: support for PHY LED control
- CAN drivers:
- m_can: add support for optional reset and system wake up
- remove can_change_mtu() obsoleted by core handling
- mcp251xfd: support GPIO controller functionality
- Bluetooth:
- add initial support for PASTa
- WiFi:
- split ieee80211.h file, it's way too big
- improvements in VHT radiotap reporting, S1G, Channel Switch
Announcement handling, rate tracking in mesh networks
- improve multi-radio monitor mode support, and add a cfg80211 debugfs
interface for it
- HT action frame handling on 6 GHz
- initial chanctx work towards NAN
- MU-MIMO sniffer improvements
- WiFi drivers:
- RealTek (rtw89):
- support USB devices RTL8852AU and RTL8852CU
- initial work for RTL8922DE
- improved injection support
- Intel:
- iwlwifi: new sniffer API support
- MediaTek (mt76):
- WED support for >32-bit DMA
- airoha NPU support
- regdomain improvements
- continued WiFi7/MLO work
- Qualcomm/Atheros:
- ath10k: factory test support
- ath11k: TX power insertion support
- ath12k: BSS color change support
- ath12k: statistics improvements
- brcmfmac: Acer A1 840 tablet quirk
- rtl8xxxu: 40 MHz connection fixes/support
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
-----BEGIN PGP SIGNATURE-----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=UoDR
-----END PGP SIGNATURE-----
Merge tag 'net-next-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
Pull networking updates from Jakub Kicinski:
"Core & protocols:
- Replace busylock at the Tx queuing layer with a lockless list.
Resulting in a 300% (4x) improvement on heavy TX workloads, sending
twice the number of packets per second, for half the cpu cycles.
- Allow constantly busy flows to migrate to a more suitable CPU/NIC
queue.
Normally we perform queue re-selection when flow comes out of idle,
but under extreme circumstances the flows may be constantly busy.
Add sysctl to allow periodic rehashing even if it'd risk packet
reordering.
- Optimize the NAPI skb cache, make it larger, use it in more paths.
- Attempt returning Tx skbs to the originating CPU (like we already
did for Rx skbs).
- Various data structure layout and prefetch optimizations from Eric.
- Remove ktime_get() from the recvmsg() fast path, ktime_get() is
sadly quite expensive on recent AMD machines.
- Extend threaded NAPI polling to allow the kthread busy poll for
packets.
- Make MPTCP use Rx backlog processing. This lowers the lock
pressure, improving the Rx performance.
- Support memcg accounting of MPTCP socket memory.
- Allow admin to opt sockets out of global protocol memory accounting
(using a sysctl or BPF-based policy). The global limits are a poor
fit for modern container workloads, where limits are imposed using
cgroups.
- Improve heuristics for when to kick off AF_UNIX garbage collection.
- Allow users to control TCP SACK compression, and default to 33% of
RTT.
- Add tcp_rcvbuf_low_rtt sysctl to let datacenter users avoid
unnecessarily aggressive rcvbuf growth and overshot when the
connection RTT is low.
- Preserve skb metadata space across skb_push / skb_pull operations.
- Support for IPIP encapsulation in the nftables flowtable offload.
- Support appending IP interface information to ICMP messages (RFC
5837).
- Support setting max record size in TLS (RFC 8449).
- Remove taking rtnl_lock from RTM_GETNEIGHTBL and RTM_SETNEIGHTBL.
- Use a dedicated lock (and RCU) in MPLS, instead of rtnl_lock.
- Let users configure the number of write buffers in SMC.
- Add new struct sockaddr_unsized for sockaddr of unknown length,
from Kees.
- Some conversions away from the crypto_ahash API, from Eric Biggers.
- Some preparations for slimming down struct page.
- YAML Netlink protocol spec for WireGuard.
- Add a tool on top of YAML Netlink specs/lib for reporting commonly
computed derived statistics and summarized system state.
Driver API:
- Add CAN XL support to the CAN Netlink interface.
- Add uAPI for reporting PHY Mean Square Error (MSE) diagnostics, as
defined by the OPEN Alliance's "Advanced diagnostic features for
100BASE-T1 automotive Ethernet PHYs" specification.
- Add DPLL phase-adjust-gran pin attribute (and implement it in
zl3073x).
- Refactor xfrm_input lock to reduce contention when NIC offloads
IPsec and performs RSS.
- Add info to devlink params whether the current setting is the
default or a user override. Allow resetting back to default.
- Add standard device stats for PSP crypto offload.
- Leverage DSA frame broadcast to implement simple HSR frame
duplication for a lot of switches without dedicated HSR offload.
- Add uAPI defines for 1.6Tbps link modes.
Device drivers:
- Add Motorcomm YT921x gigabit Ethernet switch support.
- Add MUCSE driver for N500/N210 1GbE NIC series.
- Convert drivers to support dedicated ops for timestamping control,
and away from the direct IOCTL handling. While at it support GET
operations for PHY timestamping.
- Add (and convert most drivers to) a dedicated ethtool callback for
reading the Rx ring count.
- Significant refactoring efforts in the STMMAC driver, which
supports Synopsys turn-key MAC IP integrated into a ton of SoCs.
- Ethernet high-speed NICs:
- Broadcom (bnxt):
- support PPS in/out on all pins
- Intel (100G, ice, idpf):
- ice: implement standard ethtool and timestamping stats
- i40e: support setting the max number of MAC addresses per VF
- iavf: support RSS of GTP tunnels for 5G and LTE deployments
- nVidia/Mellanox (mlx5):
- reduce downtime on interface reconfiguration
- disable being an XDP redirect target by default (same as
other drivers) to avoid wasting resources if feature is
unused
- Meta (fbnic):
- add support for Linux-managed PCS on 25G, 50G, and 100G links
- Wangxun:
- support Rx descriptor merge, and Tx head writeback
- support Rx coalescing offload
- support 25G SPF and 40G QSFP modules
- Ethernet virtual:
- Google (gve):
- allow ethtool to configure rx_buf_len
- implement XDP HW RX Timestamping support for DQ descriptor
format
- Microsoft vNIC (mana):
- support HW link state events
- handle hardware recovery events when probing the device
- Ethernet NICs consumer, and embedded:
- usbnet: add support for Byte Queue Limits (BQL)
- AMD (amd-xgbe):
- add device selftests
- NXP (enetc):
- add i.MX94 support
- Broadcom integrated MACs (bcmgenet, bcmasp):
- bcmasp: add support for PHY-based Wake-on-LAN
- Broadcom switches (b53):
- support port isolation
- support BCM5389/97/98 and BCM63XX ARL formats
- Lantiq/MaxLinear switches:
- support bridge FDB entries on the CPU port
- use regmap for register access
- allow user to enable/disable learning
- support Energy Efficient Ethernet
- support configuring RMII clock delays
- add tagging driver for MaxLinear GSW1xx switches
- Synopsys (stmmac):
- support using the HW clock in free running mode
- add Eswin EIC7700 support
- add Rockchip RK3506 support
- add Altera Agilex5 support
- Cadence (macb):
- cleanup and consolidate descriptor and DMA address handling
- add EyeQ5 support
- TI:
- icssg-prueth: support AF_XDP
- Airoha access points:
- add missing Ethernet stats and link state callback
- add AN7583 support
- support out-of-order Tx completion processing
- Power over Ethernet:
- pd692x0: preserve PSE configuration across reboots
- add support for TPS23881B devices
- Ethernet PHYs:
- Open Alliance OATC14 10BASE-T1S PHY cable diagnostic support
- Support 50G SerDes and 100G interfaces in Linux-managed PHYs
- micrel:
- support for non PTP SKUs of lan8814
- enable in-band auto-negotiation on lan8814
- realtek:
- cable testing support on RTL8224
- interrupt support on RTL8221B
- motorcomm: support for PHY LEDs on YT853
- microchip: support for LAN867X Rev.D0 PHYs w/ SQI and cable diag
- mscc: support for PHY LED control
- CAN drivers:
- m_can: add support for optional reset and system wake up
- remove can_change_mtu() obsoleted by core handling
- mcp251xfd: support GPIO controller functionality
- Bluetooth:
- add initial support for PASTa
- WiFi:
- split ieee80211.h file, it's way too big
- improvements in VHT radiotap reporting, S1G, Channel Switch
Announcement handling, rate tracking in mesh networks
- improve multi-radio monitor mode support, and add a cfg80211
debugfs interface for it
- HT action frame handling on 6 GHz
- initial chanctx work towards NAN
- MU-MIMO sniffer improvements
- WiFi drivers:
- RealTek (rtw89):
- support USB devices RTL8852AU and RTL8852CU
- initial work for RTL8922DE
- improved injection support
- Intel:
- iwlwifi: new sniffer API support
- MediaTek (mt76):
- WED support for >32-bit DMA
- airoha NPU support
- regdomain improvements
- continued WiFi7/MLO work
- Qualcomm/Atheros:
- ath10k: factory test support
- ath11k: TX power insertion support
- ath12k: BSS color change support
- ath12k: statistics improvements
- brcmfmac: Acer A1 840 tablet quirk
- rtl8xxxu: 40 MHz connection fixes/support"
* tag 'net-next-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1381 commits)
net: page_pool: sanitise allocation order
net: page pool: xa init with destroy on pp init
net/mlx5e: Support XDP target xmit with dummy program
net/mlx5e: Update XDP features in switch channels
selftests/tc-testing: Test CAKE scheduler when enqueue drops packets
net/sched: sch_cake: Fix incorrect qlen reduction in cake_drop
wireguard: netlink: generate netlink code
wireguard: uapi: generate header with ynl-gen
wireguard: uapi: move flag enums
wireguard: uapi: move enum wg_cmd
wireguard: netlink: add YNL specification
selftests: drv-net: Fix tolerance calculation in devlink_rate_tc_bw.py
selftests: drv-net: Fix and clarify TC bandwidth split in devlink_rate_tc_bw.py
selftests: drv-net: Set shell=True for sysfs writes in devlink_rate_tc_bw.py
selftests: drv-net: Use Iperf3Runner in devlink_rate_tc_bw.py
selftests: drv-net: introduce Iperf3Runner for measurement use cases
selftests: drv-net: Add devlink_rate_tc_bw.py to TEST_PROGS
net: ps3_gelic_net: Use napi_alloc_skb() and napi_gro_receive()
Documentation: net: dsa: mention simple HSR offload helpers
Documentation: net: dsa: mention availability of RedBox
...
|
|
|
Linus Torvalds
|
015e7b0b0e |
bpf-next-6.19
-----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEE+soXsSLHKoYyzcli6rmadz2vbToFAmktzC4ACgkQ6rmadz2v bTpA1w/+PZ45N3y6O+NQVIpBlpnHG7DEMK7Lw19On0xVLwH+XPHz6J5PEfzjyJR1 SCbsV30qkJ1YCtgRHHf+ZCuWPWm58hY8dXYwSDyjNavdQyVGOdf17aBu9pvH45NW K20OhwQHpCHWIfDlijjPkDdiHnYf5S7Xy6ctt/3ztF0pMDHIaghGxJymG4wULcDT iLKnT37kwO8b2ihmw/HbcZPQYMWfHRye7X009K+wCv0dnhJ6q/Ny1m+Pg4kF92e6 ON/RY26ep2dq7LpaNWa1rI1yOgFlI7uUlVojqrAuAb+xrg+64wUDBxeijvE37EN1 s/+PuEKAR6xwz1dbY2cWAI0D633saz24UdV6kCBW9HrjHKVRQ7ZSsBF9ENkS4DTK nowx4wOe1ZHc/6YgTktZp9LEn/0YrmQtFxjqEAJiYUgD18FrBrSjmhHpBiL+HghP sTqy41qDQGoKtg3bRu42Co9wmNeeLsnxT8NQExCmTYQ4ufpdA/VMQux9cBVX3GBq EchJb465+AcvvCJUiKbnHLxDsHCQz1YYytz3RqyFLgGDFZnHOE0FjwPJmM8I5kkK gvDB3ZYdO3Halm8BZfZZBnKv5uK7myuAWwqRLgMRanuZcRgmIV1oUP5EP88HdH75 fB20vZSVcfzB17SLyhiM20ivEWodJa9VCLEw9WDOmDoml+33Pks= =kaCJ -----END PGP SIGNATURE----- Merge tag 'bpf-next-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next Pull bpf updates from Alexei Starovoitov: - Convert selftests/bpf/test_tc_edt and test_tc_tunnel from .sh to test_progs runner (Alexis Lothoré) - Convert selftests/bpf/test_xsk to test_progs runner (Bastien Curutchet) - Replace bpf memory allocator with kmalloc_nolock() in bpf_local_storage (Amery Hung), and in bpf streams and range tree (Puranjay Mohan) - Introduce support for indirect jumps in BPF verifier and x86 JIT (Anton Protopopov) and arm64 JIT (Puranjay Mohan) - Remove runqslower bpf tool (Hoyeon Lee) - Fix corner cases in the verifier to close several syzbot reports (Eduard Zingerman, KaFai Wan) - Several improvements in deadlock detection in rqspinlock (Kumar Kartikeya Dwivedi) - Implement "jmp" mode for BPF trampoline and corresponding DYNAMIC_FTRACE_WITH_JMP. It improves "fexit" program type performance from 80 M/s to 136 M/s. With Steven's Ack. (Menglong Dong) - Add ability to test non-linear skbs in BPF_PROG_TEST_RUN (Paul Chaignon) - Do not let BPF_PROG_TEST_RUN emit invalid GSO types to stack (Daniel Borkmann) - Generalize buildid reader into bpf_dynptr (Mykyta Yatsenko) - Optimize bpf_map_update_elem() for map-in-map types (Ritesh Oedayrajsingh Varma) - Introduce overwrite mode for BPF ring buffer (Xu Kuohai) * tag 'bpf-next-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (169 commits) bpf: optimize bpf_map_update_elem() for map-in-map types bpf: make kprobe_multi_link_prog_run always_inline selftests/bpf: do not hardcode target rate in test_tc_edt BPF program selftests/bpf: remove test_tc_edt.sh selftests/bpf: integrate test_tc_edt into test_progs selftests/bpf: rename test_tc_edt.bpf.c section to expose program type selftests/bpf: Add success stats to rqspinlock stress test rqspinlock: Precede non-head waiter queueing with AA check rqspinlock: Disable spinning for trylock fallback rqspinlock: Use trylock fallback when per-CPU rqnode is busy rqspinlock: Perform AA checks immediately rqspinlock: Enclose lock/unlock within lock entry acquisitions bpf: Remove runqslower tool selftests/bpf: Remove usage of lsm/file_alloc_security in selftest bpf: Disable file_alloc_security hook bpf: check for insn arrays in check_ptr_alignment bpf: force BPF_F_RDONLY_PROG on insn array creation bpf: Fix exclusive map memory leak selftests/bpf: Make CS length configurable for rqspinlock stress test selftests/bpf: Add lock wait time stats to rqspinlock stress test ... |
|
|
Linus Torvalds
|
784faa8eca |
Rust changes for v6.19
Toolchain and infrastructure:
- Add support for 'syn'.
Syn is a parsing library for parsing a stream of Rust tokens into a
syntax tree of Rust source code.
Currently this library is geared toward use in Rust procedural
macros, but contains some APIs that may be useful more generally.
'syn' allows us to greatly simplify writing complex macros such as
'pin-init' (Benno has already prepared the 'syn'-based version). We
will use it in the 'macros' crate too.
'syn' is the most downloaded Rust crate (according to crates.io), and
it is also used by the Rust compiler itself. While the amount of code
is substantial, there should not be many updates needed for these
crates, and even if there are, they should not be too big, e.g. +7k
-3k lines across the 3 crates in the last year.
'syn' requires two smaller dependencies: 'quote' and 'proc-macro2'.
I only modified their code to remove a third dependency
('unicode-ident') and to add the SPDX identifiers. The code can be
easily verified to exactly match upstream with the provided scripts.
They are all licensed under "Apache-2.0 OR MIT", like the other
vendored 'alloc' crate we had for a while.
Please see the merge commit with the cover letter for more context.
- Allow 'unreachable_pub' and 'clippy::disallowed_names' for doctests.
Examples (i.e. doctests) may want to do things like show public items
and use names such as 'foo'.
Nevertheless, we still try to keep examples as close to real code as
possible (this is part of why running Clippy on doctests is important
for us, e.g. for safety comments, which userspace Rust does not
support yet but we are stricter).
'kernel' crate:
- Replace our custom 'CStr' type with 'core::ffi::CStr'.
Using the standard library type reduces our custom code footprint,
and we retain needed custom functionality through an extension trait
and a new 'fmt!' macro which replaces the previous 'core' import.
This started in 6.17 and continued in 6.18, and we finally land the
replacement now. This required quite some stamina from Tamir, who
split the changes in steps to prepare for the flag day change here.
- Replace 'kernel::c_str!' with C string literals.
C string literals were added in Rust 1.77, which produce '&CStr's
(the 'core' one), so now we can write:
c"hi"
instead of:
c_str!("hi")
- Add 'num' module for numerical features.
It includes the 'Integer' trait, implemented for all primitive
integer types.
It also includes the 'Bounded' integer wrapping type: an integer
value that requires only the 'N' less significant bits of the wrapped
type to be encoded:
// An unsigned 8-bit integer, of which only the 4 LSBs are used.
let v = Bounded::<u8, 4>:🆕:<15>();
assert_eq!(v.get(), 15);
'Bounded' is useful to e.g. enforce guarantees when working with
bitfields that have an arbitrary number of bits.
Values can be constructed from simple non-constant expressions or,
for more complex ones, validated at runtime.
'Bounded' also comes with comparison and arithmetic operations (with
both their backing type and other 'Bounded's with a compatible
backing type), casts to change the backing type, extending/shrinking
and infallible/fallible conversions from/to primitives as applicable.
- 'rbtree' module: add immutable cursor ('Cursor').
It enables to use just an immutable tree reference where appropriate.
The existing fully-featured mutable cursor is renamed to 'CursorMut'.
kallsyms:
- Fix wrong "big" kernel symbol type read from procfs.
'pin-init' crate:
- A couple minor fixes (Benno asked me to pick these patches up for
him this cycle).
Documentation:
- Quick Start guide: add Debian 13 (Trixie).
Debian Stable is now able to build Linux, since Debian 13 (released
2025-08-09) packages Rust 1.85.0, which is recent enough.
We are planning to propose that the minimum supported Rust version in
Linux follows Debian Stable releases, with Debian 13 being the first
one we upgrade to, i.e. Rust 1.85.
MAINTAINERS:
- Add entry for the new 'num' module.
- Remove Alex as Rust maintainer: he hasn't had the time to contribute
for a few years now, so it is a no-op change in practice.
And a few other cleanups and improvements.
-----BEGIN PGP SIGNATURE-----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=9nM+
-----END PGP SIGNATURE-----
Merge tag 'rust-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/ojeda/linux
Pull Rust updates from Miguel Ojeda:
"Toolchain and infrastructure:
- Add support for 'syn'.
Syn is a parsing library for parsing a stream of Rust tokens into a
syntax tree of Rust source code.
Currently this library is geared toward use in Rust procedural
macros, but contains some APIs that may be useful more generally.
'syn' allows us to greatly simplify writing complex macros such as
'pin-init' (Benno has already prepared the 'syn'-based version). We
will use it in the 'macros' crate too.
'syn' is the most downloaded Rust crate (according to crates.io),
and it is also used by the Rust compiler itself. While the amount
of code is substantial, there should not be many updates needed for
these crates, and even if there are, they should not be too big,
e.g. +7k -3k lines across the 3 crates in the last year.
'syn' requires two smaller dependencies: 'quote' and 'proc-macro2'.
I only modified their code to remove a third dependency
('unicode-ident') and to add the SPDX identifiers. The code can be
easily verified to exactly match upstream with the provided
scripts.
They are all licensed under "Apache-2.0 OR MIT", like the other
vendored 'alloc' crate we had for a while.
Please see the merge commit with the cover letter for more context.
- Allow 'unreachable_pub' and 'clippy::disallowed_names' for
doctests.
Examples (i.e. doctests) may want to do things like show public
items and use names such as 'foo'.
Nevertheless, we still try to keep examples as close to real code
as possible (this is part of why running Clippy on doctests is
important for us, e.g. for safety comments, which userspace Rust
does not support yet but we are stricter).
'kernel' crate:
- Replace our custom 'CStr' type with 'core::ffi::CStr'.
Using the standard library type reduces our custom code footprint,
and we retain needed custom functionality through an extension
trait and a new 'fmt!' macro which replaces the previous 'core'
import.
This started in 6.17 and continued in 6.18, and we finally land the
replacement now. This required quite some stamina from Tamir, who
split the changes in steps to prepare for the flag day change here.
- Replace 'kernel::c_str!' with C string literals.
C string literals were added in Rust 1.77, which produce '&CStr's
(the 'core' one), so now we can write:
c"hi"
instead of:
c_str!("hi")
- Add 'num' module for numerical features.
It includes the 'Integer' trait, implemented for all primitive
integer types.
It also includes the 'Bounded' integer wrapping type: an integer
value that requires only the 'N' least significant bits of the
wrapped type to be encoded:
// An unsigned 8-bit integer, of which only the 4 LSBs are used.
let v = Bounded::<u8, 4>:🆕:<15>();
assert_eq!(v.get(), 15);
'Bounded' is useful to e.g. enforce guarantees when working with
bitfields that have an arbitrary number of bits.
Values can also be constructed from simple non-constant expressions
or, for more complex ones, validated at runtime.
'Bounded' also comes with comparison and arithmetic operations
(with both their backing type and other 'Bounded's with a
compatible backing type), casts to change the backing type,
extending/shrinking and infallible/fallible conversions from/to
primitives as applicable.
- 'rbtree' module: add immutable cursor ('Cursor').
It enables to use just an immutable tree reference where
appropriate. The existing fully-featured mutable cursor is renamed
to 'CursorMut'.
kallsyms:
- Fix wrong "big" kernel symbol type read from procfs.
'pin-init' crate:
- A couple minor fixes (Benno asked me to pick these patches up for
him this cycle).
Documentation:
- Quick Start guide: add Debian 13 (Trixie).
Debian Stable is now able to build Linux, since Debian 13 (released
2025-08-09) packages Rust 1.85.0, which is recent enough.
We are planning to propose that the minimum supported Rust version
in Linux follows Debian Stable releases, with Debian 13 being the
first one we upgrade to, i.e. Rust 1.85.
MAINTAINERS:
- Add entry for the new 'num' module.
- Remove Alex as Rust maintainer: he hasn't had the time to
contribute for a few years now, so it is a no-op change in
practice.
And a few other cleanups and improvements"
* tag 'rust-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/ojeda/linux: (53 commits)
rust: macros: support `proc-macro2`, `quote` and `syn`
rust: syn: enable support in kbuild
rust: syn: add `README.md`
rust: syn: remove `unicode-ident` dependency
rust: syn: add SPDX License Identifiers
rust: syn: import crate
rust: quote: enable support in kbuild
rust: quote: add `README.md`
rust: quote: add SPDX License Identifiers
rust: quote: import crate
rust: proc-macro2: enable support in kbuild
rust: proc-macro2: add `README.md`
rust: proc-macro2: remove `unicode_ident` dependency
rust: proc-macro2: add SPDX License Identifiers
rust: proc-macro2: import crate
rust: kbuild: support using libraries in `rustc_procmacro`
rust: kbuild: support skipping flags in `rustc_test_library`
rust: kbuild: add proc macro library support
rust: kbuild: simplify `--cfg` handling
rust: kbuild: introduce `core-flags` and `core-skip_flags`
...
|
|
|
Linus Torvalds
|
51ab33fc0a |
livepatching changes for 6.19
-----BEGIN PGP SIGNATURE----- iQJPBAABCAA5FiEESH4wyp42V4tXvYsjUqAMR0iAlPIFAmkumVobFIAAAAAABAAO bWFudTIsMi41KzEuMTEsMiwyAAoJEFKgDEdIgJTypHMQALImoj39UZiLLVMn2d4P 5droOQw+qMCfsVVY5m9Rqw3vrCsSds+7eC5Qa2GaXR480l4ZeMGyoYCr+2gDWcM3 vwTWuj8UuUOxQlMXubIFyL9r/SUtYSiqfAPK5tGtzHuNNUEHWGed9r5RrOGKZOnj SDe6ZL5G2Kekuua1mtSZhw8qpW/nK2IuFTRPxN6O243dUGtX0wkzWr1tVRpDDzoT UNWZ2xoE1lzb/EAviyuSgSIc5YsT50bM+fMzOUHsY/E9u8fI42N1z5B+P3ZlTvGx Z5nJ79ZMtbF3/4o6OaUqvR9Y4zZ73TtkMoV4sjrjYg28q+n4/tqVlCsjy0Hys/dP MlaKbLSI54+RldTWx02Yu0jcn2Artua3N0bURyEenqkhDLW9RXVfx/h29QQYPpE9 7FSlpUAQnFzFbGUGJcB02oClkxUSUcOuzVqC0n30wfdo+bVzDn19rr+Vi2bHe8TD MsASva96n2FhRVPkm8eBxnxpaYQj9Q6G1/7B1F30Et7PLzwD9qYUvXPXceyPATnd r3hdUiKgkPvUaDhApJRHwv/ZGnNDKujGBDc/YgBQrl3cPfG0ShGzJzWz892JjX0+ NB+O+eabHVs6tFRFNvxS2fu/ROZxrGfBzZUKoaZjZh3JEgOhlLKVlL7aRqtctFvP Dz0QYiOqlkjho7FykCIEKXxQ =6o9X -----END PGP SIGNATURE----- Merge tag 'livepatching-for-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/livepatching/livepatching Pull livepatching updates from Petr Mladek: - Support both paths where tracefs is typically mounted in selftests - Make old_sympos 0 and 1 equal. They both are valid when there is only one symbol with the given name. * tag 'livepatching-for-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/livepatching/livepatching: selftests: livepatch: use canonical ftrace path livepatch: Match old_sympos 0 and 1 in klp_find_func() |
|
|
Linus Torvalds
|
02baaa67d9 |
sched_ext: Changes for v6.19
- Improve recovery from misbehaving BPF schedulers. When a scheduler puts many tasks with varying affinity restrictions on a shared DSQ, CPUs scanning through tasks they cannot run can overwhelm the system, causing lockups. Bypass mode now uses per-CPU DSQs with a load balancer to avoid this, and hooks into the hardlockup detector to attempt recovery. Add scx_cpu0 example scheduler to demonstrate this scenario. - Add lockless peek operation for DSQs to reduce lock contention for schedulers that need to query queue state during load balancing. - Allow scx_bpf_reenqueue_local() to be called from anywhere in preparation for deprecating cpu_acquire/release() callbacks in favor of generic BPF hooks. - Prepare for hierarchical scheduler support: add scx_bpf_task_set_slice() and scx_bpf_task_set_dsq_vtime() kfuncs, make scx_bpf_dsq_insert*() return bool, and wrap kfunc args in structs for future aux__prog parameter. - Implement cgroup_set_idle() callback to notify BPF schedulers when a cgroup's idle state changes. - Fix migration tasks being incorrectly downgraded from stop_sched_class to rt_sched_class across sched_ext enable/disable. Applied late as the fix is low risk and the bug subtle but needs stable backporting. - Various fixes and cleanups including cgroup exit ordering, SCX_KICK_WAIT reliability, and backward compatibility improvements. -----BEGIN PGP SIGNATURE----- iIQEABYKACwWIQTfIjM1kS57o3GsC/uxYfJx3gVYGQUCaS4h1A4cdGpAa2VybmVs Lm9yZwAKCRCxYfJx3gVYGe/MAP9EZ0pLiTpmMtt6mI/11Fmi+aWfL84j1zt13cz9 W4vb4gEA9eVEH6n9xyC4nhcOk9AQwSDuCWMOzLsnhW8TbEHVTww= =8W/B -----END PGP SIGNATURE----- Merge tag 'sched_ext-for-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext Pull sched_ext updates from Tejun Heo: - Improve recovery from misbehaving BPF schedulers. When a scheduler puts many tasks with varying affinity restrictions on a shared DSQ, CPUs scanning through tasks they cannot run can overwhelm the system, causing lockups. Bypass mode now uses per-CPU DSQs with a load balancer to avoid this, and hooks into the hardlockup detector to attempt recovery. Add scx_cpu0 example scheduler to demonstrate this scenario. - Add lockless peek operation for DSQs to reduce lock contention for schedulers that need to query queue state during load balancing. - Allow scx_bpf_reenqueue_local() to be called from anywhere in preparation for deprecating cpu_acquire/release() callbacks in favor of generic BPF hooks. - Prepare for hierarchical scheduler support: add scx_bpf_task_set_slice() and scx_bpf_task_set_dsq_vtime() kfuncs, make scx_bpf_dsq_insert*() return bool, and wrap kfunc args in structs for future aux__prog parameter. - Implement cgroup_set_idle() callback to notify BPF schedulers when a cgroup's idle state changes. - Fix migration tasks being incorrectly downgraded from stop_sched_class to rt_sched_class across sched_ext enable/disable. Applied late as the fix is low risk and the bug subtle but needs stable backporting. - Various fixes and cleanups including cgroup exit ordering, SCX_KICK_WAIT reliability, and backward compatibility improvements. * tag 'sched_ext-for-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext: (44 commits) sched_ext: Fix incorrect sched_class settings for per-cpu migration tasks sched_ext: tools: Removing duplicate targets during non-cross compilation sched_ext: Use kvfree_rcu() to release per-cpu ksyncs object sched_ext: Pass locked CPU parameter to scx_hardlockup() and add docs sched_ext: Update comments replacing breather with aborting mechanism sched_ext: Implement load balancer for bypass mode sched_ext: Factor out abbreviated dispatch dequeue into dispatch_dequeue_locked() sched_ext: Factor out scx_dsq_list_node cursor initialization into INIT_DSQ_LIST_CURSOR sched_ext: Add scx_cpu0 example scheduler sched_ext: Hook up hardlockup detector sched_ext: Make handle_lockup() propagate scx_verror() result sched_ext: Refactor lockup handlers into handle_lockup() sched_ext: Make scx_exit() and scx_vexit() return bool sched_ext: Exit dispatch and move operations immediately when aborting sched_ext: Simplify breather mechanism with scx_aborting flag sched_ext: Use per-CPU DSQs instead of per-node global DSQs in bypass mode sched_ext: Refactor do_enqueue_task() local and global DSQ paths sched_ext: Use shorter slice in bypass mode sched_ext: Mark racy bitfields to prevent adding fields that can't tolerate races sched_ext: Minor cleanups to scx_task_iter ... |
|
|
Linus Torvalds
|
8449d3252c |
cgroup: Changes for v6.19
- Defer task cgroup unlink until after the dying task's final context switch so that controllers see the cgroup properly populated until the task is truly gone. - cpuset cleanups and simplifications. Enforce that domain isolated CPUs stay in root or isolated partitions and fail if isolated+nohz_full would leave no housekeeping CPU. Fix sched/deadline root domain handling during CPU hot-unplug and race for tasks in attaching cpusets. - Misc fixes including memory reclaim protection documentation and selftest KTAP conformance. -----BEGIN PGP SIGNATURE----- iIQEABYKACwWIQTfIjM1kS57o3GsC/uxYfJx3gVYGQUCaS3pEQ4cdGpAa2VybmVs Lm9yZwAKCRCxYfJx3gVYGYbrAP9H0kVyWH5tK9VhjSZyqidic8NuvtmNOyhIRrg0 8S8K0wD/YG9xlh2JUyRmS4B23ggc59+9y5xM2/sctrho51Pvsgg= =0MB+ -----END PGP SIGNATURE----- Merge tag 'cgroup-for-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup Pull cgroup updates from Tejun Heo: - Defer task cgroup unlink until after the dying task's final context switch so that controllers see the cgroup properly populated until the task is truly gone - cpuset cleanups and simplifications. Enforce that domain isolated CPUs stay in root or isolated partitions and fail if isolated+nohz_full would leave no housekeeping CPU. Fix sched/deadline root domain handling during CPU hot-unplug and race for tasks in attaching cpusets - Misc fixes including memory reclaim protection documentation and selftest KTAP conformance * tag 'cgroup-for-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: (21 commits) cpuset: Treat cpusets in attaching as populated sched/deadline: Walk up cpuset hierarchy to decide root domain when hot-unplug cgroup/cpuset: Introduce cpuset_cpus_allowed_locked() docs: cgroup: No special handling of unpopulated memcgs docs: cgroup: Note about sibling relative reclaim protection docs: cgroup: Explain reclaim protection target selftests/cgroup: conform test to KTAP format output cpuset: remove need_rebuild_sched_domains cpuset: remove global remote_children list cpuset: simplify node setting on error cgroup: include missing header for struct irq_work cgroup: Fix sleeping from invalid context warning on PREEMPT_RT cgroup/cpuset: Globally track isolated_cpus update cgroup/cpuset: Ensure domain isolated CPUs stay in root or isolated partition cgroup/cpuset: Move up prstate_housekeeping_conflict() helper cgroup/cpuset: Fail if isolated and nohz_full don't leave any housekeeping cgroup/cpuset: Rename update_unbound_workqueue_cpumask() to update_isolation_cpumasks() cgroup: Defer task cgroup unlink until after the task is done switching out cgroup: Move dying_tasks cleanup from cgroup_task_release() to cgroup_task_free() cgroup: Rename cgroup lifecycle hooks to cgroup_task_*() ... |
|
|
Linus Torvalds
|
2b60145734 |
workqueue: Changes for v6.19
- Rescuer affinity management: Affinity now updated only when detached using wq_unbound_cpumask consistently. DISASSOCIATED workers also follow unbound cpumask changes to avoid breaking CPU isolation. - Rescuer cleanups preparing for fetching work items one by one from pool list: Work assignment factored out, optimized to skip pwqs no longer needing rescue, and shutdown logic simplified. - Unused assert_rcu_or_wq_mutex_or_pool_mutex() removed. -----BEGIN PGP SIGNATURE----- iIQEABYKACwWIQTfIjM1kS57o3GsC/uxYfJx3gVYGQUCaS3kYg4cdGpAa2VybmVs Lm9yZwAKCRCxYfJx3gVYGWkwAQC6zcYAbGTcEkfiDsg3GM6dCsHDk3hIXVguE7Em mOpnVQD/QxiYHZxt/SOY5LIIX9ZvTpBYeuW7MR5bCncSBdCLTw4= =VkvX -----END PGP SIGNATURE----- Merge tag 'wq-for-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq Pull workqueue updates from Tejun Heo: - Rescuer affinity management: Affinity is now updated only when detached using wq_unbound_cpumask consistently. DISASSOCIATED workers also follow unbound cpumask changes to avoid breaking CPU isolation - Rescuer cleanups preparing for fetching work items one by one from pool list: Work assignment factored out, optimized to skip pwqs no longer needing rescue, and shutdown logic simplified - Unused assert_rcu_or_wq_mutex_or_pool_mutex() removed * tag 'wq-for-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq: workqueue: Don't rely on wq->rescuer to stop rescuer workqueue: Only assign rescuer work when really needed workqueue: Factor out assign_rescuer_work() workqueue: Init rescuer's affinities as wq_unbound_cpumask workqueue: Let DISASSOCIATED workers follow unbound wq cpumask changes workqueue: Update the rescuer's affinity only when it is detached workqueue: Remove unused assert_rcu_or_wq_mutex_or_pool_mutex |
|
|
Linus Torvalds
|
4d38b88fd1 |
printk changes for 6.19
-----BEGIN PGP SIGNATURE-----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=FnfO
-----END PGP SIGNATURE-----
Merge tag 'printk-for-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux
Pull printk updates from Petr Mladek:
- Allow creaing nbcon console drivers with an unsafe write_atomic()
callback that can only be called by the final nbcon_atomic_flush_unsafe().
Otherwise, the driver would rely on the kthread.
It is going to be used as the-best-effort approach for an
experimental nbcon netconsole driver, see
https://lore.kernel.org/r/20251121-nbcon-v1-2-503d17b2b4af@debian.org
Note that a safe .write_atomic() callback is supposed to work in NMI
context. But some networking drivers are not safe even in IRQ
context:
https://lore.kernel.org/r/oc46gdpmmlly5o44obvmoatfqo5bhpgv7pabpvb6sjuqioymcg@gjsma3ghoz35
In an ideal world, all networking drivers would be fixed first and
the atomic flush would be blocked only in NMI context. But it brings
the question how reliable networking drivers are when the system is
in a bad state. They might block flushing more reliable serial
consoles which are more suitable for serious debugging anyway.
- Allow to use the last 4 bytes of the printk ring buffer.
- Prevent queuing IRQ work and block printk kthreads when consoles are
suspended. Otherwise, they create non-necessary churn or even block
the suspend.
- Release console_lock() between each record in the kthread used for
legacy consoles on RT. It might significantly speed up the boot.
- Release nbcon context between each record in the atomic flush. It
prevents stalls of the related printk kthread after it has lost the
ownership in the middle of a record
- Add support for NBCON consoles into KDB
- Add %ptsP modifier for printing struct timespec64 and use it where
possible
- Misc code clean up
* tag 'printk-for-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux: (48 commits)
printk: Use console_is_usable on console_unblank
arch: um: kmsg_dump: Use console_is_usable
drivers: serial: kgdboc: Drop checks for CON_ENABLED and CON_BOOT
lib/vsprintf: Unify FORMAT_STATE_NUM handlers
printk: Avoid irq_work for printk_deferred() on suspend
printk: Avoid scheduling irq_work on suspend
printk: Allow printk_trigger_flush() to flush all types
tracing: Switch to use %ptSp
scsi: snic: Switch to use %ptSp
scsi: fnic: Switch to use %ptSp
s390/dasd: Switch to use %ptSp
ptp: ocp: Switch to use %ptSp
pps: Switch to use %ptSp
PCI: epf-test: Switch to use %ptSp
net: dsa: sja1105: Switch to use %ptSp
mmc: mmc_test: Switch to use %ptSp
media: av7110: Switch to use %ptSp
ipmi: Switch to use %ptSp
igb: Switch to use %ptSp
e1000e: Switch to use %ptSp
...
|
|
|
Linus Torvalds
|
98e7dcbb82 |
RCU pull request for v6.19
SRCU
----
_ Properly handle SRCU readers within IRQ disabled sections in tiny SRCU
- Preparation to reimplement RCU Tasks Trace on top of SRCU fast:
- Introduce API to expedite a grace period and test it through
rcutorture.
- Split srcu-fast in two flavours: SRCU-fast and SRCU-fast-updown.
Both are still targeted toward faster readers (without full
barriers on LOCK and UNLOCK) at the expense of heavier write side
(using full RCU grace period ordering instead of simply full
ordering) as compared to "traditional" non-fast SRCU. But those
srcu-fast flavours are going to be optimized in two different
ways:
- SRCU-fast will become the reimplementation basis for
RCU-TASK-TRACE for consolidation. Since RCU-TASK-TRACE must
be NMI safe, SRCU-fast must be as well.
- SRCU-fast-updown will be needed for uretprobes code in order
to get rid of the read-side memory barriers while still
allowing entering the reader at task level while exiting it
in a timer handler. It is considered semaphore-like in that
it can have different owners between LOCK and UNLOCK.
However it is not NMI-safe.
The actual optimizations are work in progress for the next cycle.
Only the new interfaces are added for now, along with related
torture and scalability test code.
- Create/document/debug/torture new proper initializers for RCU fast:
DEFINE_SRCU_FAST() and init_srcu_struct_fast()
This allows for using right away the proper ordering on the write
side (either full ordering or full RCU grace period ordering) without
waiting for the read side to tell which to use. Also this optimizes
the read side altogether with moving flavour debug checks under debug
config and with removing a costly RmW operation on their first call.
- Make some diagnostic functions tracing safe.
REFSCALE
-------
Add performance testing for common context synchronizations
(Preemption, IRQ, Softirq) and per-cpu increments. Those are
relevant comparisons against SRCU-fast read side APIs, especially
as they are planned to synchronize further tracing fast-path code.
MISCELLANOUS
------
- In order to prepare the layout for nohz_full work deferral to
user exit, the context tracking state must shrink the counter
of transitions to/from RCU not watching. The only possible hazard
is to trigger wrap-around more easily, delaying a bit grace periods
when that happens. This should be a rare event though. Yet add
debugging and torture code to test that assumption.
- Fix memory leak on locktorture module
- Annotate accesses in rculist_nulls.h to prevent from KCSAN warnings.
On recent discussions, we also concluded that all those WRITE_ONCE()
and READ_ONCE() on list APIs deserve appropriate comments. Something
to be expected for the next cycle.
- Provide a script to apply several configs to several commits with torture.
- Allow torture to reuse a build directory in order to save needless
rebuild time.
- Various cleanups.
-----BEGIN PGP SIGNATURE-----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=XnUt
-----END PGP SIGNATURE-----
Merge tag 'rcu.release.v6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/rcu/linux
Pull RCU updates from Frederic Weisbecker:
"SRCU:
- Properly handle SRCU readers within IRQ disabled sections in tiny
SRCU
- Preparation to reimplement RCU Tasks Trace on top of SRCU fast:
- Introduce API to expedite a grace period and test it through
rcutorture
- Split srcu-fast in two flavours: SRCU-fast and SRCU-fast-updown.
Both are still targeted toward faster readers (without full
barriers on LOCK and UNLOCK) at the expense of heavier write
side (using full RCU grace period ordering instead of simply
full ordering) as compared to "traditional" non-fast SRCU. But
those srcu-fast flavours are going to be optimized in two
different ways:
- SRCU-fast will become the reimplementation basis for
RCU-TASK-TRACE for consolidation. Since RCU-TASK-TRACE must
be NMI safe, SRCU-fast must be as well.
- SRCU-fast-updown will be needed for uretprobes code in order
to get rid of the read-side memory barriers while still
allowing entering the reader at task level while exiting it
in a timer handler. It is considered semaphore-like in that
it can have different owners between LOCK and UNLOCK.
However it is not NMI-safe.
The actual optimizations are work in progress for the next
cycle. Only the new interfaces are added for now, along with
related torture and scalability test code.
- Create/document/debug/torture new proper initializers for RCU fast:
DEFINE_SRCU_FAST() and init_srcu_struct_fast()
This allows for using right away the proper ordering on the write
side (either full ordering or full RCU grace period ordering)
without waiting for the read side to tell which to use.
This also optimizes the read side altogether with moving flavour
debug checks under debug config and with removing a costly RmW
operation on their first call.
- Make some diagnostic functions tracing safe
Refscale:
- Add performance testing for common context synchronizations
(Preemption, IRQ, Softirq) and per-cpu increments. Those are
relevant comparisons against SRCU-fast read side APIs, especially
as they are planned to synchronize further tracing fast-path code
Miscellanous:
- In order to prepare the layout for nohz_full work deferral to user
exit, the context tracking state must shrink the counter of
transitions to/from RCU not watching. The only possible hazard is
to trigger wrap-around more easily, delaying a bit grace periods
when that happens. This should be a rare event though. Yet add
debugging and torture code to test that assumption
- Fix memory leak on locktorture module
- Annotate accesses in rculist_nulls.h to prevent from KCSAN
warnings. On recent discussions, we also concluded that all those
WRITE_ONCE() and READ_ONCE() on list APIs deserve appropriate
comments. Something to be expected for the next cycle
- Provide a script to apply several configs to several commits with
torture
- Allow torture to reuse a build directory in order to save needless
rebuild time
- Various cleanups"
* tag 'rcu.release.v6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/rcu/linux: (29 commits)
refscale: Add SRCU-fast-updown readers
refscale: Exercise DEFINE_STATIC_SRCU_FAST() and init_srcu_struct_fast()
rcutorture: Make srcu{,d}_torture_init() announce the SRCU type
srcu: Create an SRCU-fast-updown API
refscale: Do not disable interrupts for tests involving local_bh_enable()
refscale: Add non-atomic per-CPU increment readers
refscale: Add this_cpu_inc() readers
refscale: Add preempt_disable() readers
refscale: Add local_bh_disable() readers
refscale: Add local_irq_disable() and local_irq_save() readers
torture: Permit negative kvm.sh --kconfig numberic arguments
srcu: Add SRCU_READ_FLAVOR_FAST_UPDOWN CPP macro
rcu: Mark diagnostic functions as notrace
rcutorture: Make TREE04 use CONFIG_RCU_DYNTICKS_TORTURE
rcutorture: Remove redundant rcutorture_one_extend() from rcu_torture_one_read()
rcutorture: Permit kvm-again.sh to re-use the build directory
torture: Add kvm-series.sh to test commit/scenario combination
rcu: use WRITE_ONCE() for ->next and ->pprev of hlist_nulls
locktorture: Fix memory leak in param_set_cpumask()
doc: Update for SRCU-fast definitions and initialization
...
|
|
|
Linus Torvalds
|
a619fe35ab |
This update includes the following changes:
API: - Rewrite memcpy_sglist from scratch. - Add on-stack AEAD request allocation. - Fix partial block processing in ahash. Algorithms: - Remove ansi_cprng. - Remove tcrypt tests for poly1305. - Fix EINPROGRESS processing in authenc. - Fix double-free in zstd. Drivers: - Use drbg ctr helper when reseeding xilinx-trng. - Add support for PCI device 0x115A to ccp. - Add support of paes in caam. - Add support for aes-xts in dthev2. Others: - Use likely in rhashtable lookup. - Fix lockdep false-positive in padata by removing a helper. -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEn51F/lCuNhUwmDeSxycdCkmxi6cFAmktaHwACgkQxycdCkmx i6duthAAl4ZjsuSgt0P9ZPJXWgSH+QbNT/6fL1QzLEuzLVGn8Mt99LTQpaYU8HRh fced8+R7UpqA/FgZTYbRKopZJVJJqhmTf2zqjbe47CroRm2Wf5UO+6ZXBsiqbMwa 6fNLilhcrq5G3DrIHepCpIQ7NM2+ucTMnPRIWP3cvzLwX0JzPtYIpYUSiVPAtkjh 9g24oPz6LR/xZfyk+wPbHOSYeqz4sSXnGJkL+Vn33AtU5KJZLum9zMP4Lleim7HP XaNnUL/S/PYCspycrvfrnq6+YMLPw2USguttuZe0Dg0qhq/jPMyzdEkTAjcTD5LG NZavVUbQsf6BW+YjXgaE/ybcSs6WR3ySs8aza1Ev8QqsmpbJj9xdpF9fn4RsffGR mbhc5plJCKWzfiaparea8yY9n5vHwbOK4zoyF9P6kI5ykkoA+GmwRwTW73M9KCfa i1R6g97O+t4Yaq9JI9GG7dkm9bxJpY+XaKouW7rqv/MX0iND1ExDYaqdcA+Xa61c TNfdlVcGyX7Dolm2xnpvRv8EqF9NzeK4Vw1QslrdCijXfe7eJymabNKhLBlV4li0 tVfmh4vyQFgruyiR7r7AkXIKzsLZbji030UoOsQqiMW7ualBUQ0dCDbBa8J6kUcX /vjbSmxV3LKgVgYvUBRRGIi9CJbKfs29RkS6RFtdqcq/YT4KsJU= =DHes -----END PGP SIGNATURE----- Merge tag 'v6.19-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 Pull crypto updates from Herbert Xu: "API: - Rewrite memcpy_sglist from scratch - Add on-stack AEAD request allocation - Fix partial block processing in ahash Algorithms: - Remove ansi_cprng - Remove tcrypt tests for poly1305 - Fix EINPROGRESS processing in authenc - Fix double-free in zstd Drivers: - Use drbg ctr helper when reseeding xilinx-trng - Add support for PCI device 0x115A to ccp - Add support of paes in caam - Add support for aes-xts in dthev2 Others: - Use likely in rhashtable lookup - Fix lockdep false-positive in padata by removing a helper" * tag 'v6.19-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (71 commits) crypto: zstd - fix double-free in per-CPU stream cleanup crypto: ahash - Zero positive err value in ahash_update_finish crypto: ahash - Fix crypto_ahash_import with partial block data crypto: lib/mpi - use min() instead of min_t() crypto: ccp - use min() instead of min_t() hwrng: core - use min3() instead of nested min_t() crypto: aesni - ctr_crypt() use min() instead of min_t() crypto: drbg - Delete unused ctx from struct sdesc crypto: testmgr - Add missing DES weak and semi-weak key tests Revert "crypto: scatterwalk - Move skcipher walk and use it for memcpy_sglist" crypto: scatterwalk - Fix memcpy_sglist() to always succeed crypto: iaa - Request to add Kanchana P Sridhar to Maintainers. crypto: tcrypt - Remove unused poly1305 support crypto: ansi_cprng - Remove unused ansi_cprng algorithm crypto: asymmetric_keys - fix uninitialized pointers with free attribute KEYS: Avoid -Wflex-array-member-not-at-end warning crypto: ccree - Correctly handle return of sg_nents_for_len crypto: starfive - Correctly handle return of sg_nents_for_len crypto: iaa - Fix incorrect return value in save_iaa_wq() crypto: zstd - Remove unnecessary size_t cast ... |
|
|
Linus Torvalds
|
777f817160 |
integrity-v6.19
-----BEGIN PGP SIGNATURE-----
iIoEABYKADIWIQQdXVVFGN5XqKr1Hj7LwZzRsCrn5QUCaS896BQcem9oYXJAbGlu
dXguaWJtLmNvbQAKCRDLwZzRsCrn5RDuAQDx4fmvctP8kc9PeRjd5X/UV1ip1pPD
beMKt8ghEThQiAEAzjFJbNGUDKhfR8yWODifAvYRurU5YQJZZI9wJ8skNw0=
=3Vc4
-----END PGP SIGNATURE-----
Merge tag 'integrity-v6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity
Pull integrity updates from Mimi Zohar:
"Bug fixes:
- defer credentials checking from the bprm_check_security hook to the
bprm_creds_from_file security hook
- properly ignore IMA policy rules based on undefined SELinux labels
IMA policy rule extensions:
- extend IMA to limit including file hashes in the audit logs
(dont_audit action)
- define a new filesystem subtype policy option (fs_subtype)
Misc:
- extend IMA to support in-kernel module decompression by deferring
the IMA signature verification in kernel_read_file() to after the
kernel module is decompressed"
* tag 'integrity-v6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity:
ima: Handle error code returned by ima_filter_rule_match()
ima: Access decompressed kernel module to verify appended signature
ima: add fs_subtype condition for distinguishing FUSE instances
ima: add dont_audit action to suppress audit actions
ima: Attach CREDS_CHECK IMA hook to bprm_creds_from_file LSM hook
|
|
|
Linus Torvalds
|
0eae3283c3 |
audit/stable-6.19 PR 20251201
-----BEGIN PGP SIGNATURE----- iQJIBAABCgAyFiEES0KozwfymdVUl37v6iDy2pc3iXMFAmkuAIcUHHBhdWxAcGF1 bC1tb29yZS5jb20ACgkQ6iDy2pc3iXMWlhAAgydMY1/oYPKbP3xdJTPJU6uc4GLk o1lRaO59FkwogA2iupU6rltKiqhPYH7lIzebMcOuRLzaHpO0sGk0anyCMjNW2Agl P/Zu+xkF+uGnzpO3gpaOLYFbCkpT98hNbyZu33l6ftxr37+S+DWHuThUhmOnxcgQ z7Kguq0jaruiW8oc219HjNI/VCWW0F1W/+PVjFUSZogty2K2UttsabZQFMJ8MHg6 9C2jP/f+tN2KD55u7oEA5QiucC/8BdNdyLGke4TvjhG38FG4bh71Q59LknHa5yMa 6+NeftpE76+Inb8e+ze7iNv1InRccBXurm0p6lZ/lU5nYrjRT245CleQ7nq9ppD1 hyhuGQP/fvvYExKdTl1VWXA0zGLb6+1rIn6f//MpDSbXShGj/5vK82Qo/ug1ZEGH QEAr6g2/S6xgudl2ui5OHSDb87nDWxzNo1t9TxGPBoQ6TG3ryPcm1ccTB0tb59+3 Poej26MOuZUrTpiQl3SLnfwjN0WnkiqGX5y/Cjh9tHFVk2OzOe/VqImZk9oeFgxt O+IEB2cUO/U0D/3tdECqiRVS/RFe3jSn/qYCzP9fQaLhD0IpqlhfJ5TXbWiQam8Y vGjNCx17a7mwvfxCIofEANw0wu3ooajq68UjRVhTpoKka0USKvktAoFirAB8r54I oNSBfWKl4polguo= =3hKh -----END PGP SIGNATURE----- Merge tag 'audit-pr-20251201' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit Pull audit updates from Paul Moore: - Consolidate the loops in __audit_inode_child() to improve performance When logging a child inode in __audit_inode_child(), we first run through the list of recorded inodes looking for the parent and then we repeat the search looking for a matching child entry. This pull request consolidates both searches into one pass through the recorded inodes, resuling in approximately a 50% reduction in audit overhead. See the commit description for the testing details. - Combine kmalloc()/memset() into kzalloc() in audit_krule_to_data() - Comment fixes * tag 'audit-pr-20251201' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit: audit: merge loops in __audit_inode_child() audit: Use kzalloc() instead of kmalloc()/memset() in audit_krule_to_data() audit: fix comment misindentation in audit.h |
|
|
Linus Torvalds
|
d348c22394 |
Power management updates for 6.19-rc1
- Introduce and document a QoS limit on CPU exit latency during wakeup
from suspend-to-idle (Ulf Hansson)
- Add support for building libcpupower statically (Zuo An)
- Add support for sending netlink notifications to user space on energy
model updates (Changwoo Mini, Peng Fan)
- Minor improvements to the Rust OPP interface (Tamir Duberstein)
- Fixes to scope-based pointers in the OPP library (Viresh Kumar)
- Use residency threshold in polling state override decisions in the
menu cpuidle governor (Aboorva Devarajan)
- Add sanity check for exit latency and target residency in the cpufreq
core (Rafael Wysocki)
- Use this_cpu_ptr() where possible in the teo governor (Christian
Loehle)
- Rework the handling of tick wakeups in the teo cpuidle governor to
increase the likelihood of stopping the scheduler tick in the cases
when tick wakeups can be counted as non-timer ones (Rafael Wysocki)
- Fix a reverse condition in the teo cpuidle governor and drop a
misguided target residency check from it (Rafael Wysocki)
- Clean up multiple minor defects in the teo cpuidle governor (Rafael
Wysocki)
- Update header inclusion to make it follow the Include What You Use
principle (Andy Shevchenko)
- Enable MSR-based RAPL PMU support in the intel_rapl power capping
driver and arrange for using it on the Panther Lake and Wildcat Lake
processors (Kuppuswamy Sathyanarayanan)
- Add support for Nova Lake and Wildcat Lake processors to the
intel_rapl power capping driver (Kaushlendra Kumar, Srinivas
Pandruvada)
- Add OPP and bandwidth support for Tegra186 (Aaron Kling)
- Optimizations for parameter array handling in the amd-pstate cpufreq
driver (Mario Limonciello)
- Fix for mode changes with offline CPUs in the amd-pstate cpufreq
driver (Gautham Shenoy)
- Preserve freq_table_sorted across suspend/hibernate in the cpufreq
core (Zihuan Zhang)
- Adjust energy model rules for Intel hybrid platforms in the
intel_pstate cpufreq driver and improve printing of debug messages
in it (Rafael Wysocki)
- Replace deprecated strcpy() in cpufreq_unregister_governor()
(Thorsten Blum)
- Fix duplicate hyperlink target errors in the intel_pstate cpufreq
driver documentation and use :ref: directive for internal linking in
it (Swaraj Gaikwad, Bagas Sanjaya)
- Add Diamond Rapids OOB mode support to the intel_pstate cpufreq
driver (Kuppuswamy Sathyanarayanan)
- Use mutex guard for driver locking in the intel_pstate driver and
eliminate some code duplication from it (Rafael Wysocki)
- Replace udelay() with usleep_range() in ACPI cpufreq (Kaushlendra
Kumar)
- Minor improvements to various cpufreq drivers (Christian Marangi, Hal
Feng, Jie Zhan, Marco Crivellari, Miaoqian Lin, and Shuhao Fu)
- Replace snprintf() with scnprintf() in show_trace_dev_match()
(Kaushlendra Kumar)
- Fix memory allocation error handling in pm_vt_switch_required()
(Malaya Kumar Rout)
- Introduce CALL_PM_OP() macro and use it to simplify code in
generic PM operations (Kaushlendra Kumar)
- Add module param to backtrace all CPUs in the device power management
watchdog (Sergey Senozhatsky)
- Rework message printing in swsusp_save() (Rafael Wysocki)
- Make it possible to change the number of hibernation compression
threads (Xueqin Luo)
- Clarify that only cgroup1 freezer uses PM freezer (Tejun Heo)
- Add document on debugging shutdown hangs to PM documentation and
correct a mistaken configuration option in it (Mario Limonciello)
- Shut down wakeup source timer before removing the wakeup source from
the list (Kaushlendra Kumar, Rafael Wysocki)
- Introduce new PMSG_POWEROFF event for system shutdown handling with
the help of PM device callbacks (Mario Limonciello)
- Make pm_test delay interruptible by wakeup events (Riwen Lu)
- Clean up kernel-doc comment style usage in the core hibernation
code and remove unuseful comments from it (Sunday Adelodun, Rafael
Wysocki)
- Add support for handling wakeup events and aborting the suspend
process while it is syncing file systems (Samuel Wu, Rafael Wysocki)
- Add WQ_UNBOUND to pm_wq workqueue (Marco Crivellari)
- Add runtime PM wrapper macros for ACQUIRE()/ACQUIRE_ERR() and use
them in the PCI core and the ACPI TAD driver (Rafael Wysocki)
- Improve runtime PM in the ACPI TAD driver (Rafael Wysocki)
- Update pm_runtime_allow/forbid() documentation (Rafael Wysocki)
- Fix typos in runtime.c comments (Malaya Kumar Rout)
- Move governor.h from devfreq under include/linux/ and rename to
devfreq-governor.h to allow devfreq governor definitions in out
of drivers/devfreq/ (Dmitry Baryshkov)
- Use min() to improve readability in tegra30-devfreq.c (Thorsten
Blum)
- Fix potential use-after-free issue of OPP handling in
hisi_uncore_freq.c (Pengjie Zhang)
- Fix typo in DFSO_DOWNDIFFERENTIAL macro name in
governor_simpleondemand.c in devfreq (Riwen Lu)
-----BEGIN PGP SIGNATURE-----
iQFGBAABCAAwFiEEcM8Aw/RY0dgsiRUR7l+9nS/U47UFAmkp0BYSHHJqd0Byand5
c29ja2kubmV0AAoJEO5fvZ0v1OO1Pc8H/2G5d0aD/ym1a8MDTpKqn7t3/rVMHa76
YGfxXMBr1oY++r5GTJTKBxZBHmF89VH71kdyvsMidTAtHjR+iZAS1ajd2Q5VYjOF
QNMld1qgPEzAZU8WSetDrBqMr89zls05Uubo4aCoNy6rFmgRaLHh3AmIKSS9aJuo
C1eH8dRONME5I/rafkOUpFs1+/Agq1vePwPZmwVnZX9A3qI+UOhMRdU9A37kYkx9
YwfQvR2fKTIPjZ6B9f/wGXPOvdrT37d4+dWT3EABOHMkxlpAPDMvmVzZsUaXSQMr
0d9NGEjPGo33qciKJJpHqNOdDOhi90606WBBf7aaMF+GMhDX3PznOK4=
=rzXO
-----END PGP SIGNATURE-----
Merge tag 'pm-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management updates from Rafael Wysocki:
"There are quite a few interesting things here, including new hardware
support, new features, some bug fixes and documentation updates. In
addition, there are a usual bunch of minor fixes and cleanups all
over.
In the new hardware support category, there are intel_pstate and
intel_rapl driver updates to support new processors, Panther Lake,
Wildcat Lake, Noval Lake, and Diamond Rapids in the OOB mode, OPP and
bandwidth allocation support in the tegra186 cpufreq driver, and
JH7110S SOC support in dt-platdev cpufreq.
The new features are the PM QoS CPU latency limit for suspend-to-idle,
the netlink support for the energy model management, support for
terminating system suspend via a wakeup event during the sync of file
systems, configurable number of hibernation compression threads, the
runtime PM auto-cleanup macros, and the "poweroff" PM event that is
expected to be used during system shutdown.
Bugs are mostly fixed in cpuidle governors, but there are also fixes
elsewhere, like in the amd-pstate cpufreq driver.
Documentation updates include, but are not limited to, a new doc on
debugging shutdown hangs, cross-referencing fixes and cleanups in the
intel_pstate documentation, and updates of comments in the core
hibernation code.
Specifics:
- Introduce and document a QoS limit on CPU exit latency during
wakeup from suspend-to-idle (Ulf Hansson)
- Add support for building libcpupower statically (Zuo An)
- Add support for sending netlink notifications to user space on
energy model updates (Changwoo Mini, Peng Fan)
- Minor improvements to the Rust OPP interface (Tamir Duberstein)
- Fixes to scope-based pointers in the OPP library (Viresh Kumar)
- Use residency threshold in polling state override decisions in the
menu cpuidle governor (Aboorva Devarajan)
- Add sanity check for exit latency and target residency in the
cpufreq core (Rafael Wysocki)
- Use this_cpu_ptr() where possible in the teo governor (Christian
Loehle)
- Rework the handling of tick wakeups in the teo cpuidle governor to
increase the likelihood of stopping the scheduler tick in the cases
when tick wakeups can be counted as non-timer ones (Rafael Wysocki)
- Fix a reverse condition in the teo cpuidle governor and drop a
misguided target residency check from it (Rafael Wysocki)
- Clean up multiple minor defects in the teo cpuidle governor (Rafael
Wysocki)
- Update header inclusion to make it follow the Include What You Use
principle (Andy Shevchenko)
- Enable MSR-based RAPL PMU support in the intel_rapl power capping
driver and arrange for using it on the Panther Lake and Wildcat
Lake processors (Kuppuswamy Sathyanarayanan)
- Add support for Nova Lake and Wildcat Lake processors to the
intel_rapl power capping driver (Kaushlendra Kumar, Srinivas
Pandruvada)
- Add OPP and bandwidth support for Tegra186 (Aaron Kling)
- Optimizations for parameter array handling in the amd-pstate
cpufreq driver (Mario Limonciello)
- Fix for mode changes with offline CPUs in the amd-pstate cpufreq
driver (Gautham Shenoy)
- Preserve freq_table_sorted across suspend/hibernate in the cpufreq
core (Zihuan Zhang)
- Adjust energy model rules for Intel hybrid platforms in the
intel_pstate cpufreq driver and improve printing of debug messages
in it (Rafael Wysocki)
- Replace deprecated strcpy() in cpufreq_unregister_governor()
(Thorsten Blum)
- Fix duplicate hyperlink target errors in the intel_pstate cpufreq
driver documentation and use :ref: directive for internal linking
in it (Swaraj Gaikwad, Bagas Sanjaya)
- Add Diamond Rapids OOB mode support to the intel_pstate cpufreq
driver (Kuppuswamy Sathyanarayanan)
- Use mutex guard for driver locking in the intel_pstate driver and
eliminate some code duplication from it (Rafael Wysocki)
- Replace udelay() with usleep_range() in ACPI cpufreq (Kaushlendra
Kumar)
- Minor improvements to various cpufreq drivers (Christian Marangi,
Hal Feng, Jie Zhan, Marco Crivellari, Miaoqian Lin, and Shuhao Fu)
- Replace snprintf() with scnprintf() in show_trace_dev_match()
(Kaushlendra Kumar)
- Fix memory allocation error handling in pm_vt_switch_required()
(Malaya Kumar Rout)
- Introduce CALL_PM_OP() macro and use it to simplify code in generic
PM operations (Kaushlendra Kumar)
- Add module param to backtrace all CPUs in the device power
management watchdog (Sergey Senozhatsky)
- Rework message printing in swsusp_save() (Rafael Wysocki)
- Make it possible to change the number of hibernation compression
threads (Xueqin Luo)
- Clarify that only cgroup1 freezer uses PM freezer (Tejun Heo)
- Add document on debugging shutdown hangs to PM documentation and
correct a mistaken configuration option in it (Mario Limonciello)
- Shut down wakeup source timer before removing the wakeup source
from the list (Kaushlendra Kumar, Rafael Wysocki)
- Introduce new PMSG_POWEROFF event for system shutdown handling with
the help of PM device callbacks (Mario Limonciello)
- Make pm_test delay interruptible by wakeup events (Riwen Lu)
- Clean up kernel-doc comment style usage in the core hibernation
code and remove unuseful comments from it (Sunday Adelodun, Rafael
Wysocki)
- Add support for handling wakeup events and aborting the suspend
process while it is syncing file systems (Samuel Wu, Rafael
Wysocki)
- Add WQ_UNBOUND to pm_wq workqueue (Marco Crivellari)
- Add runtime PM wrapper macros for ACQUIRE()/ACQUIRE_ERR() and use
them in the PCI core and the ACPI TAD driver (Rafael Wysocki)
- Improve runtime PM in the ACPI TAD driver (Rafael Wysocki)
- Update pm_runtime_allow/forbid() documentation (Rafael Wysocki)
- Fix typos in runtime.c comments (Malaya Kumar Rout)
- Move governor.h from devfreq under include/linux/ and rename to
devfreq-governor.h to allow devfreq governor definitions in out of
drivers/devfreq/ (Dmitry Baryshkov)
- Use min() to improve readability in tegra30-devfreq.c (Thorsten
Blum)
- Fix potential use-after-free issue of OPP handling in
hisi_uncore_freq.c (Pengjie Zhang)
- Fix typo in DFSO_DOWNDIFFERENTIAL macro name in
governor_simpleondemand.c in devfreq (Riwen Lu)"
* tag 'pm-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (96 commits)
PM / devfreq: Fix typo in DFSO_DOWNDIFFERENTIAL macro name
cpuidle: Warn instead of bailing out if target residency check fails
cpuidle: Update header inclusion
Documentation: power/cpuidle: Document the CPU system wakeup latency QoS
cpuidle: Respect the CPU system wakeup QoS limit for cpuidle
sched: idle: Respect the CPU system wakeup QoS limit for s2idle
pmdomain: Respect the CPU system wakeup QoS limit for cpuidle
pmdomain: Respect the CPU system wakeup QoS limit for s2idle
PM: QoS: Introduce a CPU system wakeup QoS limit
cpuidle: governors: teo: Add missing space to the description
PM: hibernate: Extra cleanup of comments in swap handling code
PM / devfreq: tegra30: use min to simplify actmon_cpu_to_emc_rate
PM / devfreq: hisi: Fix potential UAF in OPP handling
PM / devfreq: Move governor.h to a public header location
powercap: intel_rapl: Enable MSR-based RAPL PMU support
powercap: intel_rapl: Prepare read_raw() interface for atomic-context callers
cpufreq: qcom-nvmem: fix compilation warning for qcom_cpufreq_ipq806x_match_list
PM: sleep: Call pm_sleep_fs_sync() instead of ksys_sync_helper()
PM: sleep: Add support for wakeup during filesystem sync
cpufreq: ACPI: Replace udelay() with usleep_range()
...
|
|
|
Linus Torvalds
|
7f8d5f70ff |
Tree wide cleanup of the remaining users of in_irq() which got replaced
by in_hardirq() and marked deprecated in 2020. -----BEGIN PGP SIGNATURE----- iQJHBAABCgAxFiEEQp8+kY+LLUocC4bMphj1TA10mKEFAmkvDhUTHHRnbHhAbGlu dXRyb25peC5kZQAKCRCmGPVMDXSYoW+XD/959KAIm2JpcEYUWuNBmlhEyuYWvPLw ZyOiraLYBNyWmfCO/Yz4Ff8VZSR9gdWQoNfvBb8uxkbSXa0UOEUhCbzWsuoTnqR5 ObTIHCJ9QmPlRiFDvs4Sf5TGmy/4nXh6/PoH3JykNdlD3rZMTxiAz/k6QuO/S2iu ykA+DNtNL7jDkQHzrWa3rf597BkBN1Z+hUD8zHRt8LYKRfmLYWjCMggjPLMnuqcn 240fnV/FubCLd9f5ZgNxHQMQCQH2qB7GYMk08YwXwCZQqIIXWqbNnhedkkNO3kWq Sws4TEO6yg9pgTFqkuiDU5QgYEboRY4pDT45KSkdTHHGZl2OAAl3eVIGCto72UEI Eyzn4k900hZ1iI/Rad5mx3D4XJZEXFgEbXhjph0odn6jVvmSj+Fmg3J67u1niO2a obzB+xeaIkbGNQIgJFy8+A9SSnZckvuPlXdZdUxS2S95zH7f9+vBY8HWJMuyursa 3AJAKa82mN1i3A9FdSuMTdttQWkDmrwPKVzxvixs1mBu7kB70XaRIKsPjZj7LH6X CiqP9Kt5FO0hVA7K+nKTeUA5DdjB4HzYzOgMqzFUhExY3hksVsj8rQEO6B0bCp9t CfITA3BvU7GXxhXZHOq3dABQ21J/ZHgeuK3QdQSnOxSQOv2ElYIdKvYirJy2QdS1 tSM3O3GXb4zWDg== =6LKf -----END PGP SIGNATURE----- Merge tag 'core-core-2025-12-03' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull core irq cleanup from Thomas Gleixner: "Tree wide cleanup of the remaining users of in_irq() which got replaced by in_hardirq() and marked deprecated in 2020" * tag 'core-core-2025-12-03' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: treewide: Remove in_irq() |
|
|
Linus Torvalds
|
d42e504a55 |
Update to the time/timers core:
- Prevent a thundering herd problem when the timekeeper CPU is delayed
and a large number of CPUs compete to acquire jiffies_lock to do the
update. Limit it to one CPU with a separate "uncontended" atomic
variable.
- A set of improvements for the timer migration mechanism:
- Support imbalanced NUMA trees correctly
- Support dynamic exclusion of CPUs from the migrator duty to allow the
cpuset/isolation mechanism to exclude them from handling timers of
remote idle CPUs.
- The usual small updates, cleanups and enhancements
-----BEGIN PGP SIGNATURE-----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=lQKn
-----END PGP SIGNATURE-----
Merge tag 'timers-core-2025-11-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer core updates from Thomas Gleixner:
- Prevent a thundering herd problem when the timekeeper CPU is delayed
and a large number of CPUs compete to acquire jiffies_lock to do the
update. Limit it to one CPU with a separate "uncontended" atomic
variable.
- A set of improvements for the timer migration mechanism:
- Support imbalanced NUMA trees correctly
- Support dynamic exclusion of CPUs from the migrator duty to allow
the cpuset/isolation mechanism to exclude them from handling
timers of remote idle CPUs
- The usual small updates, cleanups and enhancements
* tag 'timers-core-2025-11-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
timers/migration: Exclude isolated cpus from hierarchy
cpumask: Add initialiser to use cleanup helpers
sched/isolation: Force housekeeping if isolcpus and nohz_full don't leave any
cgroup/cpuset: Rename update_unbound_workqueue_cpumask() to update_isolation_cpumasks()
timers/migration: Use scoped_guard on available flag set/clear
timers/migration: Add mask for CPUs available in the hierarchy
timers/migration: Rename 'online' bit to 'available'
selftests/timers/nanosleep: Add tests for return of remaining time
selftests/timers: Clean up kernel version check in posix_timers
time: Fix a few typos in time[r] related code comments
time: tick-oneshot: Add missing Return and parameter descriptions to kernel-doc
hrtimer: Store time as ktime_t in restart block
timers/migration: Remove dead code handling idle CPU checking for remote timers
timers/migration: Remove unused "cpu" parameter from tmigr_get_group()
timers/migration: Assert that hotplug preparing CPU is part of stable active hierarchy
timers/migration: Fix imbalanced NUMA trees
timers/migration: Remove locking on group connection
timers/migration: Convert "while" loops to use "for"
tick/sched: Limit non-timekeeper CPUs calling jiffies update
|
|
|
Linus Torvalds
|
9ce62ebbb7 |
Updates for [PCI] MSI related code:
- Remove one variant of PCI/MSI management as all users have been
converted to use per device domains. That reduces the variants to two:
The modern and the real archaic legacy variant, which keeps the usual
suspects in the museum category alive.
- Rework the platform MSI device ID detection mechanism in the ARM GIC
world to address resource leaks, duplicated code and other details. This
requires a corresponding preparatory step in the PCI/iproc driver.
- Trivial core code cleanups
-----BEGIN PGP SIGNATURE-----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=VAtQ
-----END PGP SIGNATURE-----
Merge tag 'irq-msi-2025-11-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull MSI updates from Thomas Gleixner:
"Updates for [PCI] MSI related code:
- Remove one variant of PCI/MSI management as all users have been
converted to use per device domains. That reduces the variants to
two:
The modern and the real archaic legacy variant, which keeps the
usual suspects in the museum category alive.
- Rework the platform MSI device ID detection mechanism in the ARM
GIC world to address resource leaks, duplicated code and other
details. This requires a corresponding preparatory step in the
PCI/iproc driver.
- Trivial core code cleanups"
* tag 'irq-msi-2025-11-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip/gic-its: Rework platform MSI deviceID detection
PCI: iproc: Implement MSI controller node detection with of_msi_xlate()
genirq/msi: Slightly simplify msi_domain_alloc()
PCI/MSI: Delete pci_msi_create_irq_domain()
|
|
|
Linus Torvalds
|
6863c8385c |
Updates for the interrupt core and treewide cleanups:
- Rework of the Per Processor Interrupt (PPI) management on ARM[64].
PPI support was built under the assumption that the systems are
homogenous so that the same CPU local device types are connected to
them. That's unfortunately wishful thinking and created horrible
workarounds.
This rework provides affinity management for PPIs so that they can be
individually configured in the firmware tables and mops up the related
drivers all over the place.
- Prevent CPUSET/isolation changes to arbitrarily affine interrupt
threads to random CPUs, which ignores user or driver settings.
- Plug a harmless race in the interrupt affinity proc interface, which
allows to see a half updated mask
- Adjust the priority of secondary interrupt threads on RT, so that the
combination of primary and secondary thread emulates the hardware
interrupt plus thread scenario. Having them at the same priority can
cause starvation issues in some drivers.
-----BEGIN PGP SIGNATURE-----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=zrA1
-----END PGP SIGNATURE-----
Merge tag 'irq-core-2025-11-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq core updates from Thomas Gleixner:
"Updates for the interrupt core and treewide cleanups:
- Rework of the Per Processor Interrupt (PPI) management on ARM[64]
PPI support was built under the assumption that the systems are
homogenous so that the same CPU local device types are connected to
them. That's unfortunately wishful thinking and created horrible
workarounds.
This rework provides affinity management for PPIs so that they can
be individually configured in the firmware tables and mops up the
related drivers all over the place.
- Prevent CPUSET/isolation changes to arbitrarily affine interrupt
threads to random CPUs, which ignores user or driver settings.
- Plug a harmless race in the interrupt affinity proc interface,
which allows to see a half updated mask
- Adjust the priority of secondary interrupt threads on RT, so that
the combination of primary and secondary thread emulates the
hardware interrupt plus thread scenario. Having them at the same
priority can cause starvation issues in some drivers"
* tag 'irq-core-2025-11-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (33 commits)
genirq: Remove cpumask availability check on kthread affinity setting
genirq: Fix interrupt threads affinity vs. cpuset isolated partitions
genirq: Prevent early spurious wake-ups of interrupt threads
genirq: Use raw_spinlock_irq() in irq_set_affinity_notifier()
genirq/manage: Reduce priority of forced secondary interrupt handler
genirq/proc: Fix race in show_irq_affinity()
genirq: Fix percpu_devid irq affinity documentation
perf: arm_pmu: Kill last use of per-CPU cpu_armpmu pointer
irqdomain: Kill of_node_to_fwnode() helper
genirq: Kill irq_{g,s}et_percpu_devid_partition()
irqchip: Kill irq-partition-percpu
irqchip/apple-aic: Drop support for custom PMU irq partitions
irqchip/gic-v3: Drop support for custom PPI partitions
coresight: trbe: Request specific affinities for per CPU interrupts
perf: arm_spe_pmu: Request specific affinities for per CPU interrupts
perf: arm_pmu: Request specific affinities for per CPU NMIs/interrupts
genirq: Add request_percpu_irq_affinity() helper
genirq: Allow per-cpu interrupt sharing for non-overlapping affinities
genirq: Update request_percpu_nmi() to take an affinity
genirq: Add affinity to percpu_devid interrupt requests
...
|
|
|
Linus Torvalds
|
2b09f480f0 |
A large overhaul of the restartable sequences and CID management:
The recent enablement of RSEQ in glibc resulted in regressions which are
caused by the related overhead. It turned out that the decision to invoke
the exit to user work was not really a decision. More or less each
context switch caused that. There is a long list of small issues which
sums up nicely and results in a 3-4% regression in I/O benchmarks.
The other detail which caused issues due to extra work in context switch
and task migration is the CID (memory context ID) management. It also
requires to use a task work to consolidate the CID space, which is
executed in the context of an arbitrary task and results in sporadic
uncontrolled exit latencies.
The rewrite addresses this by:
- Removing deprecated and long unsupported functionality
- Moving the related data into dedicated data structures which are
optimized for fast path processing.
- Caching values so actual decisions can be made
- Replacing the current implementation with a optimized inlined variant.
- Separating fast and slow path for architectures which use the generic
entry code, so that only fault and error handling goes into the
TIF_NOTIFY_RESUME handler.
- Rewriting the CID management so that it becomes mostly invisible in the
context switch path. That moves the work of switching modes into the
fork/exit path, which is a reasonable tradeoff. That work is only
required when a process creates more threads than the cpuset it is
allowed to run on or when enough threads exit after that. An artificial
thread pool benchmarks which triggers this did not degrade, it actually
improved significantly.
The main effect in migration heavy scenarios is that runqueue lock held
time and therefore contention goes down significantly.
-----BEGIN PGP SIGNATURE-----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=n5KT
-----END PGP SIGNATURE-----
Merge tag 'core-rseq-2025-11-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull rseq updates from Thomas Gleixner:
"A large overhaul of the restartable sequences and CID management:
The recent enablement of RSEQ in glibc resulted in regressions which
are caused by the related overhead. It turned out that the decision to
invoke the exit to user work was not really a decision. More or less
each context switch caused that. There is a long list of small issues
which sums up nicely and results in a 3-4% regression in I/O
benchmarks.
The other detail which caused issues due to extra work in context
switch and task migration is the CID (memory context ID) management.
It also requires to use a task work to consolidate the CID space,
which is executed in the context of an arbitrary task and results in
sporadic uncontrolled exit latencies.
The rewrite addresses this by:
- Removing deprecated and long unsupported functionality
- Moving the related data into dedicated data structures which are
optimized for fast path processing.
- Caching values so actual decisions can be made
- Replacing the current implementation with a optimized inlined
variant.
- Separating fast and slow path for architectures which use the
generic entry code, so that only fault and error handling goes into
the TIF_NOTIFY_RESUME handler.
- Rewriting the CID management so that it becomes mostly invisible in
the context switch path. That moves the work of switching modes
into the fork/exit path, which is a reasonable tradeoff. That work
is only required when a process creates more threads than the
cpuset it is allowed to run on or when enough threads exit after
that. An artificial thread pool benchmarks which triggers this did
not degrade, it actually improved significantly.
The main effect in migration heavy scenarios is that runqueue lock
held time and therefore contention goes down significantly"
* tag 'core-rseq-2025-11-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (54 commits)
sched/mmcid: Switch over to the new mechanism
sched/mmcid: Implement deferred mode change
irqwork: Move data struct to a types header
sched/mmcid: Provide CID ownership mode fixup functions
sched/mmcid: Provide new scheduler CID mechanism
sched/mmcid: Introduce per task/CPU ownership infrastructure
sched/mmcid: Serialize sched_mm_cid_fork()/exit() with a mutex
sched/mmcid: Provide precomputed maximal value
sched/mmcid: Move initialization out of line
signal: Move MMCID exit out of sighand lock
sched/mmcid: Convert mm CID mask to a bitmap
cpumask: Cache num_possible_cpus()
sched/mmcid: Use cpumask_weighted_or()
cpumask: Introduce cpumask_weighted_or()
sched/mmcid: Prevent pointless work in mm_update_cpus_allowed()
sched/mmcid: Move scheduler code out of global header
sched: Fixup whitespace damage
sched/mmcid: Cacheline align MM CID storage
sched/mmcid: Use proper data structures
sched/mmcid: Revert the complex CID management
...
|
|
|
Linus Torvalds
|
1dce50698a |
Scoped user mode access and related changes:
- Implement the missing u64 user access function on ARM when
CONFIG_CPU_SPECTRE=n. This makes it possible to access a 64bit value in
generic code with [unsafe_]get_user(). All other architectures and ARM
variants provide the relevant accessors already.
- Ensure that ASM GOTO jump label usage in the user mode access helpers
always goes through a local C scope label indirection inside the
helpers. This is required because compilers are not supporting that a
ASM GOTO target leaves a auto cleanup scope. GCC silently fails to emit
the cleanup invocation and CLANG fails the build.
This provides generic wrapper macros and the conversion of affected
architecture code to use them.
- Scoped user mode access with auto cleanup
Access to user mode memory can be required in hot code paths, but if it
has to be done with user controlled pointers, the access is shielded
with a speculation barrier, so that the CPU cannot speculate around the
address range check. Those speculation barriers impact performance quite
significantly. This can be avoided by "masking" the provided pointer so
it is guaranteed to be in the valid user memory access range and
otherwise to point to a guaranteed unpopulated address space. This has
to be done without branches so it creates an address dependency for the
access, which the CPU cannot speculate ahead.
This results in repeating and error prone programming patterns:
if (can_do_masked_user_access())
from = masked_user_read_access_begin((from));
else if (!user_read_access_begin(from, sizeof(*from)))
return -EFAULT;
unsafe_get_user(val, from, Efault);
user_read_access_end();
return 0;
Efault:
user_read_access_end();
return -EFAULT;
which can be replaced with scopes and automatic cleanup:
scoped_user_read_access(from, Efault)
unsafe_get_user(val, from, Efault);
return 0;
Efault:
return -EFAULT;
- Convert code which implements the above pattern over to
scope_user.*.access(). This also corrects a couple of imbalanced
masked_*_begin() instances which are harmless on most architectures, but
prevent PowerPC from implementing the masking optimization.
- Add a missing speculation barrier in copy_from_user_iter()
-----BEGIN PGP SIGNATURE-----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=6no0
-----END PGP SIGNATURE-----
Merge tag 'core-uaccess-2025-11-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scoped user access updates from Thomas Gleixner:
"Scoped user mode access and related changes:
- Implement the missing u64 user access function on ARM when
CONFIG_CPU_SPECTRE=n.
This makes it possible to access a 64bit value in generic code with
[unsafe_]get_user(). All other architectures and ARM variants
provide the relevant accessors already.
- Ensure that ASM GOTO jump label usage in the user mode access
helpers always goes through a local C scope label indirection
inside the helpers.
This is required because compilers are not supporting that a ASM
GOTO target leaves a auto cleanup scope. GCC silently fails to emit
the cleanup invocation and CLANG fails the build.
[ Editor's note: gcc-16 will have fixed the code generation issue
in commit f68fe3ddda4 ("eh: Invoke cleanups/destructors in asm
goto jumps [PR122835]"). But we obviously have to deal with clang
and older versions of gcc, so.. - Linus ]
This provides generic wrapper macros and the conversion of affected
architecture code to use them.
- Scoped user mode access with auto cleanup
Access to user mode memory can be required in hot code paths, but
if it has to be done with user controlled pointers, the access is
shielded with a speculation barrier, so that the CPU cannot
speculate around the address range check. Those speculation
barriers impact performance quite significantly.
This cost can be avoided by "masking" the provided pointer so it is
guaranteed to be in the valid user memory access range and
otherwise to point to a guaranteed unpopulated address space. This
has to be done without branches so it creates an address dependency
for the access, which the CPU cannot speculate ahead.
This results in repeating and error prone programming patterns:
if (can_do_masked_user_access())
from = masked_user_read_access_begin((from));
else if (!user_read_access_begin(from, sizeof(*from)))
return -EFAULT;
unsafe_get_user(val, from, Efault);
user_read_access_end();
return 0;
Efault:
user_read_access_end();
return -EFAULT;
which can be replaced with scopes and automatic cleanup:
scoped_user_read_access(from, Efault)
unsafe_get_user(val, from, Efault);
return 0;
Efault:
return -EFAULT;
- Convert code which implements the above pattern over to
scope_user.*.access(). This also corrects a couple of imbalanced
masked_*_begin() instances which are harmless on most
architectures, but prevent PowerPC from implementing the masking
optimization.
- Add a missing speculation barrier in copy_from_user_iter()"
* tag 'core-uaccess-2025-11-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
lib/strn*,uaccess: Use masked_user_{read/write}_access_begin when required
scm: Convert put_cmsg() to scoped user access
iov_iter: Add missing speculation barrier to copy_from_user_iter()
iov_iter: Convert copy_from_user_iter() to masked user access
select: Convert to scoped user access
x86/futex: Convert to scoped user access
futex: Convert to get/put_user_inline()
uaccess: Provide put/get_user_inline()
uaccess: Provide scoped user access regions
arm64: uaccess: Use unsafe wrappers for ASM GOTO
s390/uaccess: Use unsafe wrappers for ASM GOTO
riscv/uaccess: Use unsafe wrappers for ASM GOTO
powerpc/uaccess: Use unsafe wrappers for ASM GOTO
x86/uaccess: Use unsafe wrappers for ASM GOTO
uaccess: Provide ASM GOTO safe wrappers for unsafe_*_user()
ARM: uaccess: Implement missing __get_user_asm_dword()
|
|
|
Linus Torvalds
|
4a26e7032d |
Core kernel bug handling infrastructure changes for v6.19:
- Improve WARN(), which has vararg printf like arguments,
to work with the x86 #UD based WARN-optimizing infrastructure
by hiding the format in the bug_table and replacing this
first argument with the address of the bug-table entry,
while making the actual function that's called a UD1 instruction.
(Peter Zijlstra)
- Introduce the CONFIG_DEBUG_BUGVERBOSE_DETAILED Kconfig switch
(Ingo Molnar, s390 support by Heiko Carstens)
Fixes and cleanups:
- bugs/s390: Remove private WARN_ON() implementation (Heiko Carstens)
- <asm/bugs.h>: Make i386 use GENERIC_BUG_RELATIVE_POINTERS
(Peter Zijlstra)
Signed-off-by: Ingo Molnar <mingo@kernel.org>
-----BEGIN PGP SIGNATURE-----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=bMUL
-----END PGP SIGNATURE-----
Merge tag 'core-bugs-2025-12-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull bug handling infrastructure updates from Ingo Molnar:
"Core updates:
- Improve WARN(), which has vararg printf like arguments, to work
with the x86 #UD based WARN-optimizing infrastructure by hiding the
format in the bug_table and replacing this first argument with the
address of the bug-table entry, while making the actual function
that's called a UD1 instruction (Peter Zijlstra)
- Introduce the CONFIG_DEBUG_BUGVERBOSE_DETAILED Kconfig switch (Ingo
Molnar, s390 support by Heiko Carstens)
Fixes and cleanups:
- bugs/s390: Remove private WARN_ON() implementation (Heiko Carstens)
- <asm/bugs.h>: Make i386 use GENERIC_BUG_RELATIVE_POINTERS (Peter
Zijlstra)"
* tag 'core-bugs-2025-12-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (31 commits)
x86/bugs: Make i386 use GENERIC_BUG_RELATIVE_POINTERS
x86/bug: Fix BUG_FORMAT vs KASLR
x86_64/bug: Inline the UD1
x86/bug: Implement WARN_ONCE()
x86_64/bug: Implement __WARN_printf()
x86/bug: Use BUG_FORMAT for DEBUG_BUGVERBOSE_DETAILED
x86/bug: Add BUG_FORMAT basics
bug: Allow architectures to provide __WARN_printf()
bug: Implement WARN_ON() using __WARN_FLAGS()
bug: Add report_bug_entry()
bug: Add BUG_FORMAT_ARGS infrastructure
bug: Clean up CONFIG_GENERIC_BUG_RELATIVE_POINTERS
bug: Add BUG_FORMAT infrastructure
x86: Rework __bug_table helpers
bugs/s390: Remove private WARN_ON() implementation
bugs/core: Reorganize fields in the first line of WARNING output, add ->comm[] output
bugs/sh: Concatenate 'cond_str' with '__FILE__' in __WARN_FLAGS(), to extend WARN_ON/BUG_ON output
bugs/parisc: Concatenate 'cond_str' with '__FILE__' in __WARN_FLAGS(), to extend WARN_ON/BUG_ON output
bugs/riscv: Concatenate 'cond_str' with '__FILE__' in __BUG_FLAGS(), to extend WARN_ON/BUG_ON output
bugs/riscv: Pass in 'cond_str' to __BUG_FLAGS()
...
|
|
|
Linus Torvalds
|
6d2c10e889 |
Scheduler changes for v6.19:
Scalability and load-balancing improvements:
- Enable scheduler feature NEXT_BUDDY (Mel Gorman)
- Reimplement NEXT_BUDDY to align with EEVDF goals (Mel Gorman)
- Skip sched_balance_running cmpxchg when balance is not due (Tim Chen)
- Implement generic code for architecture specific sched domain
NUMA distances (Tim Chen)
- Optimize the NUMA distances of the sched-domains builds of Intel
Granite Rapids (GNR) and Clearwater Forest (CWF) platforms
(Tim Chen)
- Implement proportional newidle balance: a randomized algorithm
that runs newidle balancing proportional to its success rate.
(Peter Zijlstra)
Scheduler infrastructure changes:
- Implement the 'sched_change' scoped_guard() pattern for
the entire scheduler (Peter Zijlstra)
- More broadly utilize the sched_change guard (Peter Zijlstra)
- Add support to pick functions to take runqueue-flags (Joel Fernandes)
- Provide and use set_need_resched_current() (Peter Zijlstra)
Fair scheduling enhancements:
- Forfeit vruntime on yield (Fernand Sieber)
- Only update stats for allowed CPUs when looking for dst group (Adam Li)
CPU-core scheduling enhancements:
- Optimize core cookie matching check (Fernand Sieber)
Deadline scheduler fixes:
- Only set free_cpus for online runqueues (Doug Berger)
- Fix dl_server time accounting (Peter Zijlstra)
- Fix dl_server stop condition (Peter Zijlstra)
Proxy scheduling fixes:
- Yield the donor task (Fernand Sieber)
Fixes and cleanups:
- Fix do_set_cpus_allowed() locking (Peter Zijlstra)
- Fix migrate_disable_switch() locking (Peter Zijlstra)
- Remove double update_rq_clock() in __set_cpus_allowed_ptr_locked() (Hao Jia)
- Increase sched_tick_remote timeout (Phil Auld)
- sched/deadline: Use cpumask_weight_and() in dl_bw_cpus() (Shrikanth Hegde)
- sched/deadline: Clean up select_task_rq_dl() (Shrikanth Hegde)
Signed-off-by: Ingo Molnar <mingo@kernel.org>
-----BEGIN PGP SIGNATURE-----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=BZY4
-----END PGP SIGNATURE-----
Merge tag 'sched-core-2025-12-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler updates from Ingo Molnar:
"Scalability and load-balancing improvements:
- Enable scheduler feature NEXT_BUDDY (Mel Gorman)
- Reimplement NEXT_BUDDY to align with EEVDF goals (Mel Gorman)
- Skip sched_balance_running cmpxchg when balance is not due (Tim
Chen)
- Implement generic code for architecture specific sched domain NUMA
distances (Tim Chen)
- Optimize the NUMA distances of the sched-domains builds of Intel
Granite Rapids (GNR) and Clearwater Forest (CWF) platforms (Tim
Chen)
- Implement proportional newidle balance: a randomized algorithm that
runs newidle balancing proportional to its success rate. (Peter
Zijlstra)
Scheduler infrastructure changes:
- Implement the 'sched_change' scoped_guard() pattern for the entire
scheduler (Peter Zijlstra)
- More broadly utilize the sched_change guard (Peter Zijlstra)
- Add support to pick functions to take runqueue-flags (Joel
Fernandes)
- Provide and use set_need_resched_current() (Peter Zijlstra)
Fair scheduling enhancements:
- Forfeit vruntime on yield (Fernand Sieber)
- Only update stats for allowed CPUs when looking for dst group (Adam
Li)
CPU-core scheduling enhancements:
- Optimize core cookie matching check (Fernand Sieber)
Deadline scheduler fixes:
- Only set free_cpus for online runqueues (Doug Berger)
- Fix dl_server time accounting (Peter Zijlstra)
- Fix dl_server stop condition (Peter Zijlstra)
Proxy scheduling fixes:
- Yield the donor task (Fernand Sieber)
Fixes and cleanups:
- Fix do_set_cpus_allowed() locking (Peter Zijlstra)
- Fix migrate_disable_switch() locking (Peter Zijlstra)
- Remove double update_rq_clock() in __set_cpus_allowed_ptr_locked()
(Hao Jia)
- Increase sched_tick_remote timeout (Phil Auld)
- sched/deadline: Use cpumask_weight_and() in dl_bw_cpus() (Shrikanth
Hegde)
- sched/deadline: Clean up select_task_rq_dl() (Shrikanth Hegde)"
* tag 'sched-core-2025-12-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (44 commits)
sched: Provide and use set_need_resched_current()
sched/fair: Proportional newidle balance
sched/fair: Small cleanup to update_newidle_cost()
sched/fair: Small cleanup to sched_balance_newidle()
sched/fair: Revert max_newidle_lb_cost bump
sched/fair: Reimplement NEXT_BUDDY to align with EEVDF goals
sched/fair: Enable scheduler feature NEXT_BUDDY
sched: Increase sched_tick_remote timeout
sched/fair: Have SD_SERIALIZE affect newidle balancing
sched/fair: Skip sched_balance_running cmpxchg when balance is not due
sched/deadline: Minor cleanup in select_task_rq_dl()
sched/deadline: Use cpumask_weight_and() in dl_bw_cpus
sched/deadline: Document dl_server
sched/deadline: Fix dl_server stop condition
sched/deadline: Fix dl_server time accounting
sched/core: Remove double update_rq_clock() in __set_cpus_allowed_ptr_locked()
sched/eevdf: Fix min_vruntime vs avg_vruntime
sched/core: Add comment explaining force-idle vruntime snapshots
sched/core: Optimize core cookie matching check
sched/proxy: Yield the donor task
...
|
|
|
Linus Torvalds
|
6c26fbe8c9 |
Performance events changes for v6.19:
Callchain support:
- Add support for deferred user-space stack unwinding for
perf, enabled on x86. (Peter Zijlstra, Steven Rostedt)
- unwind_user/x86: Enable frame pointer unwinding on x86
(Josh Poimboeuf)
x86 PMU support and infrastructure:
- x86/insn: Simplify for_each_insn_prefix() (Peter Zijlstra)
- x86/insn,uprobes,alternative: Unify insn_is_nop()
(Peter Zijlstra)
Intel PMU driver:
- Large series to prepare for and implement architectural PEBS
support for Intel platforms such as Clearwater Forest (CWF)
and Panther Lake (PTL). (Dapeng Mi, Kan Liang)
- Check dynamic constraints (Kan Liang)
- Optimize PEBS extended config (Peter Zijlstra)
- cstates: Remove PC3 support from LunarLake (Zhang Rui)
- cstates: Add Pantherlake support (Zhang Rui)
- cstates: Clearwater Forest support (Zide Chen)
AMD PMU driver:
- x86/amd: Check event before enable to avoid GPF (George Kennedy)
Fixes and cleanups:
- task_work: Fix NMI race condition (Peter Zijlstra)
- perf/x86: Fix NULL event access and potential PEBS record loss
(Dapeng Mi)
- Misc other fixes and cleanups.
(Dapeng Mi, Ingo Molnar, Peter Zijlstra)
Signed-off-by: Ingo Molnar <mingo@kernel.org>
-----BEGIN PGP SIGNATURE-----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=/8GE
-----END PGP SIGNATURE-----
Merge tag 'perf-core-2025-12-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull performance events updates from Ingo Molnar:
"Callchain support:
- Add support for deferred user-space stack unwinding for perf,
enabled on x86. (Peter Zijlstra, Steven Rostedt)
- unwind_user/x86: Enable frame pointer unwinding on x86 (Josh
Poimboeuf)
x86 PMU support and infrastructure:
- x86/insn: Simplify for_each_insn_prefix() (Peter Zijlstra)
- x86/insn,uprobes,alternative: Unify insn_is_nop() (Peter Zijlstra)
Intel PMU driver:
- Large series to prepare for and implement architectural PEBS
support for Intel platforms such as Clearwater Forest (CWF) and
Panther Lake (PTL). (Dapeng Mi, Kan Liang)
- Check dynamic constraints (Kan Liang)
- Optimize PEBS extended config (Peter Zijlstra)
- cstates:
- Remove PC3 support from LunarLake (Zhang Rui)
- Add Pantherlake support (Zhang Rui)
- Clearwater Forest support (Zide Chen)
AMD PMU driver:
- x86/amd: Check event before enable to avoid GPF (George Kennedy)
Fixes and cleanups:
- task_work: Fix NMI race condition (Peter Zijlstra)
- perf/x86: Fix NULL event access and potential PEBS record loss
(Dapeng Mi)
- Misc other fixes and cleanups (Dapeng Mi, Ingo Molnar, Peter
Zijlstra)"
* tag 'perf-core-2025-12-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (38 commits)
perf/x86/intel: Fix and clean up intel_pmu_drain_arch_pebs() type use
perf/x86/intel: Optimize PEBS extended config
perf/x86/intel: Check PEBS dyn_constraints
perf/x86/intel: Add a check for dynamic constraints
perf/x86/intel: Add counter group support for arch-PEBS
perf/x86/intel: Setup PEBS data configuration and enable legacy groups
perf/x86/intel: Update dyn_constraint base on PEBS event precise level
perf/x86/intel: Allocate arch-PEBS buffer and initialize PEBS_BASE MSR
perf/x86/intel: Process arch-PEBS records or record fragments
perf/x86/intel/ds: Factor out PEBS group processing code to functions
perf/x86/intel/ds: Factor out PEBS record processing code to functions
perf/x86/intel: Initialize architectural PEBS
perf/x86/intel: Correct large PEBS flag check
perf/x86/intel: Replace x86_pmu.drain_pebs calling with static call
perf/x86: Fix NULL event access and potential PEBS record loss
perf/x86: Remove redundant is_x86_event() prototype
entry,unwind/deferred: Fix unwind_reset_info() placement
unwind_user/x86: Fix arch=um build
perf: Support deferred user unwind
unwind_user/x86: Teach FP unwind about start of function
...
|
|
|
Linus Torvalds
|
63e6995005 |
objtool updates for v6.19:
- klp-build livepatch module generation (Josh Poimboeuf)
Introduce new objtool features and a klp-build
script to generate livepatch modules using a
source .patch as input.
This builds on concepts from the longstanding out-of-tree
kpatch project which began in 2012 and has been used for
many years to generate livepatch modules for production kernels.
However, this is a complete rewrite which incorporates
hard-earned lessons from 12+ years of maintaining kpatch.
Key improvements compared to kpatch-build:
- Integrated with objtool: Leverages objtool's existing control-flow
graph analysis to help detect changed functions.
- Works on vmlinux.o: Supports late-linked objects, making it
compatible with LTO, IBT, and similar.
- Simplified code base: ~3k fewer lines of code.
- Upstream: No more out-of-tree #ifdef hacks, far less cruft.
- Cleaner internals: Vastly simplified logic for symbol/section/reloc
inclusion and special section extraction.
- Robust __LINE__ macro handling: Avoids false positive binary diffs
caused by the __LINE__ macro by introducing a fix-patch-lines script
which injects #line directives into the source .patch to preserve
the original line numbers at compile time.
- Disassemble code with libopcodes instead of running objdump
(Alexandre Chartre)
- Disassemble support (-d option to objtool) by Alexandre Chartre,
which supports the decoding of various Linux kernel code generation
specials such as alternatives:
17ef: sched_balance_find_dst_group+0x62f mov 0x34(%r9),%edx
17f3: sched_balance_find_dst_group+0x633 | <alternative.17f3> | X86_FEATURE_POPCNT
17f3: sched_balance_find_dst_group+0x633 | call 0x17f8 <__sw_hweight64> | popcnt %rdi,%rax
17f8: sched_balance_find_dst_group+0x638 cmp %eax,%edx
... jump table alternatives:
1895: sched_use_asym_prio+0x5 test $0x8,%ch
1898: sched_use_asym_prio+0x8 je 0x18a9 <sched_use_asym_prio+0x19>
189a: sched_use_asym_prio+0xa | <jump_table.189a> | JUMP
189a: sched_use_asym_prio+0xa | jmp 0x18ae <sched_use_asym_prio+0x1e> | nop2
189c: sched_use_asym_prio+0xc mov $0x1,%eax
18a1: sched_use_asym_prio+0x11 and $0x80,%ecx
... exception table alternatives:
native_read_msr:
5b80: native_read_msr+0x0 mov %edi,%ecx
5b82: native_read_msr+0x2 | <ex_table.5b82> | EXCEPTION
5b82: native_read_msr+0x2 | rdmsr | resume at 0x5b84 <native_read_msr+0x4>
5b84: native_read_msr+0x4 shl $0x20,%rdx
.... x86 feature flag decoding (also see the X86_FEATURE_POPCNT
example in sched_balance_find_dst_group() above):
2faaf: start_thread_common.constprop.0+0x1f jne 0x2fba4 <start_thread_common.constprop.0+0x114>
2fab5: start_thread_common.constprop.0+0x25 | <alternative.2fab5> | X86_FEATURE_ALWAYS | X86_BUG_NULL_SEG
2fab5: start_thread_common.constprop.0+0x25 | jmp 0x2faba <.altinstr_aux+0x2f4> | jmp 0x4b0 <start_thread_common.constprop.0+0x3f> | nop5
2faba: start_thread_common.constprop.0+0x2a mov $0x2b,%eax
... NOP sequence shortening:
1048e2: snapshot_write_finalize+0xc2 je 0x104917 <snapshot_write_finalize+0xf7>
1048e4: snapshot_write_finalize+0xc4 nop6
1048ea: snapshot_write_finalize+0xca nop11
1048f5: snapshot_write_finalize+0xd5 nop11
104900: snapshot_write_finalize+0xe0 mov %rax,%rcx
104903: snapshot_write_finalize+0xe3 mov 0x10(%rdx),%rax
... and much more.
- Function validation tracing support (Alexandre Chartre)
- Various -ffunction-sections fixes (Josh Poimboeuf)
- Clang AutoFDO (Automated Feedback-Directed Optimizations) support (Josh Poimboeuf)
- Misc fixes and cleanups (Borislav Petkov, Chen Ni,
Dylan Hatch, Ingo Molnar, John Wang, Josh Poimboeuf,
Pankaj Raghav, Peter Zijlstra, Thorsten Blum)
Signed-off-by: Ingo Molnar <mingo@kernel.org>
-----BEGIN PGP SIGNATURE-----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=yPrS
-----END PGP SIGNATURE-----
Merge tag 'objtool-core-2025-12-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull objtool updates from Ingo Molnar:
- klp-build livepatch module generation (Josh Poimboeuf)
Introduce new objtool features and a klp-build script to generate
livepatch modules using a source .patch as input.
This builds on concepts from the longstanding out-of-tree kpatch
project which began in 2012 and has been used for many years to
generate livepatch modules for production kernels. However, this is a
complete rewrite which incorporates hard-earned lessons from 12+
years of maintaining kpatch.
Key improvements compared to kpatch-build:
- Integrated with objtool: Leverages objtool's existing control-flow
graph analysis to help detect changed functions.
- Works on vmlinux.o: Supports late-linked objects, making it
compatible with LTO, IBT, and similar.
- Simplified code base: ~3k fewer lines of code.
- Upstream: No more out-of-tree #ifdef hacks, far less cruft.
- Cleaner internals: Vastly simplified logic for
symbol/section/reloc inclusion and special section extraction.
- Robust __LINE__ macro handling: Avoids false positive binary diffs
caused by the __LINE__ macro by introducing a fix-patch-lines
script which injects #line directives into the source .patch to
preserve the original line numbers at compile time.
- Disassemble code with libopcodes instead of running objdump
(Alexandre Chartre)
- Disassemble support (-d option to objtool) by Alexandre Chartre,
which supports the decoding of various Linux kernel code generation
specials such as alternatives:
17ef: sched_balance_find_dst_group+0x62f mov 0x34(%r9),%edx
17f3: sched_balance_find_dst_group+0x633 | <alternative.17f3> | X86_FEATURE_POPCNT
17f3: sched_balance_find_dst_group+0x633 | call 0x17f8 <__sw_hweight64> | popcnt %rdi,%rax
17f8: sched_balance_find_dst_group+0x638 cmp %eax,%edx
... jump table alternatives:
1895: sched_use_asym_prio+0x5 test $0x8,%ch
1898: sched_use_asym_prio+0x8 je 0x18a9 <sched_use_asym_prio+0x19>
189a: sched_use_asym_prio+0xa | <jump_table.189a> | JUMP
189a: sched_use_asym_prio+0xa | jmp 0x18ae <sched_use_asym_prio+0x1e> | nop2
189c: sched_use_asym_prio+0xc mov $0x1,%eax
18a1: sched_use_asym_prio+0x11 and $0x80,%ecx
... exception table alternatives:
native_read_msr:
5b80: native_read_msr+0x0 mov %edi,%ecx
5b82: native_read_msr+0x2 | <ex_table.5b82> | EXCEPTION
5b82: native_read_msr+0x2 | rdmsr | resume at 0x5b84 <native_read_msr+0x4>
5b84: native_read_msr+0x4 shl $0x20,%rdx
.... x86 feature flag decoding (also see the X86_FEATURE_POPCNT
example in sched_balance_find_dst_group() above):
2faaf: start_thread_common.constprop.0+0x1f jne 0x2fba4 <start_thread_common.constprop.0+0x114>
2fab5: start_thread_common.constprop.0+0x25 | <alternative.2fab5> | X86_FEATURE_ALWAYS | X86_BUG_NULL_SEG
2fab5: start_thread_common.constprop.0+0x25 | jmp 0x2faba <.altinstr_aux+0x2f4> | jmp 0x4b0 <start_thread_common.constprop.0+0x3f> | nop5
2faba: start_thread_common.constprop.0+0x2a mov $0x2b,%eax
... NOP sequence shortening:
1048e2: snapshot_write_finalize+0xc2 je 0x104917 <snapshot_write_finalize+0xf7>
1048e4: snapshot_write_finalize+0xc4 nop6
1048ea: snapshot_write_finalize+0xca nop11
1048f5: snapshot_write_finalize+0xd5 nop11
104900: snapshot_write_finalize+0xe0 mov %rax,%rcx
104903: snapshot_write_finalize+0xe3 mov 0x10(%rdx),%rax
... and much more.
- Function validation tracing support (Alexandre Chartre)
- Various -ffunction-sections fixes (Josh Poimboeuf)
- Clang AutoFDO (Automated Feedback-Directed Optimizations) support
(Josh Poimboeuf)
- Misc fixes and cleanups (Borislav Petkov, Chen Ni, Dylan Hatch, Ingo
Molnar, John Wang, Josh Poimboeuf, Pankaj Raghav, Peter Zijlstra,
Thorsten Blum)
* tag 'objtool-core-2025-12-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (129 commits)
objtool: Fix segfault on unknown alternatives
objtool: Build with disassembly can fail when including bdf.h
objtool: Trim trailing NOPs in alternative
objtool: Add wide output for disassembly
objtool: Compact output for alternatives with one instruction
objtool: Improve naming of group alternatives
objtool: Add Function to get the name of a CPU feature
objtool: Provide access to feature and flags of group alternatives
objtool: Fix address references in alternatives
objtool: Disassemble jump table alternatives
objtool: Disassemble exception table alternatives
objtool: Print addresses with alternative instructions
objtool: Disassemble group alternatives
objtool: Print headers for alternatives
objtool: Preserve alternatives order
objtool: Add the --disas=<function-pattern> action
objtool: Do not validate IBT for .return_sites and .call_sites
objtool: Improve tracing of alternative instructions
objtool: Add functions to better name alternatives
objtool: Identify the different types of alternatives
...
|
|
|
Linus Torvalds
|
b53440f8e5 |
Locking updates for v6.19:
Mutexes:
- Redo __mutex_init() to reduce generated code size
(Sebastian Andrzej Siewior)
Seqlocks:
- Introduce scoped_seqlock_read() (Peter Zijlstra)
- Change thread_group_cputime() to use scoped_seqlock_read()
(Oleg Nesterov)
- Change do_task_stat() to use scoped_seqlock_read()
(Oleg Nesterov)
- Change do_io_accounting() to use scoped_seqlock_read()
(Oleg Nesterov)
- Fix the incorrect documentation of read_seqbegin_or_lock() /
need_seqretry() (Oleg Nesterov)
- Allow KASAN to fail optimizing (Peter Zijlstra)
Local lock updates:
- Fix all kernel-doc warnings (Randy Dunlap)
- Add the <linux/local_lock*.h> headers to MAINTAINERS
(Sebastian Andrzej Siewior)
- Reduce the risk of shadowing via s/l/__l/ and s/tl/__tl/
(Vincent Mailhol)
Lock debugging:
- spinlock/debug: Fix data-race in do_raw_write_lock
(Alexander Sverdlin)
Atomic primitives infrastructure:
- atomic: Skip alignment check for try_cmpxchg() old arg
(Arnd Bergmann)
Rust runtime integration:
- sync: atomic: Enable generated Atomic<T> usage (Boqun Feng)
- sync: atomic: Implement Debug for Atomic<Debug> (Boqun Feng)
- debugfs: Remove Rust native atomics and replace them with
Linux versions (Boqun Feng)
- debugfs: Implement Reader for Mutex<T> only when T is Unpin
(Boqun Feng)
- lock: guard: Add T: Unpin bound to DerefMut (Daniel Almeida)
- lock: Pin the inner data (Daniel Almeida)
- lock: Add a Pin<&mut T> accessor (Daniel Almeida)
Signed-off-by: Ingo Molnar <mingo@kernel.org>
-----BEGIN PGP SIGNATURE-----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=KPgY
-----END PGP SIGNATURE-----
Merge tag 'locking-core-2025-12-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking updates from Ingo Molnar:
"Mutexes:
- Redo __mutex_init() to reduce generated code size (Sebastian
Andrzej Siewior)
Seqlocks:
- Introduce scoped_seqlock_read() (Peter Zijlstra)
- Change thread_group_cputime() to use scoped_seqlock_read() (Oleg
Nesterov)
- Change do_task_stat() to use scoped_seqlock_read() (Oleg Nesterov)
- Change do_io_accounting() to use scoped_seqlock_read() (Oleg
Nesterov)
- Fix the incorrect documentation of read_seqbegin_or_lock() /
need_seqretry() (Oleg Nesterov)
- Allow KASAN to fail optimizing (Peter Zijlstra)
Local lock updates:
- Fix all kernel-doc warnings (Randy Dunlap)
- Add the <linux/local_lock*.h> headers to MAINTAINERS (Sebastian
Andrzej Siewior)
- Reduce the risk of shadowing via s/l/__l/ and s/tl/__tl/ (Vincent
Mailhol)
Lock debugging:
- spinlock/debug: Fix data-race in do_raw_write_lock (Alexander
Sverdlin)
Atomic primitives infrastructure:
- atomic: Skip alignment check for try_cmpxchg() old arg (Arnd
Bergmann)
Rust runtime integration:
- sync: atomic: Enable generated Atomic<T> usage (Boqun Feng)
- sync: atomic: Implement Debug for Atomic<Debug> (Boqun Feng)
- debugfs: Remove Rust native atomics and replace them with Linux
versions (Boqun Feng)
- debugfs: Implement Reader for Mutex<T> only when T is Unpin (Boqun
Feng)
- lock: guard: Add T: Unpin bound to DerefMut (Daniel Almeida)
- lock: Pin the inner data (Daniel Almeida)
- lock: Add a Pin<&mut T> accessor (Daniel Almeida)"
* tag 'locking-core-2025-12-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
locking/local_lock: Fix all kernel-doc warnings
locking/local_lock: s/l/__l/ and s/tl/__tl/ to reduce the risk of shadowing
locking/local_lock: Add the <linux/local_lock*.h> headers to MAINTAINERS
locking/mutex: Redo __mutex_init() to reduce generated code size
rust: debugfs: Replace the usage of Rust native atomics
rust: sync: atomic: Implement Debug for Atomic<Debug>
rust: sync: atomic: Make Atomic*Ops pub(crate)
seqlock: Allow KASAN to fail optimizing
rust: debugfs: Implement Reader for Mutex<T> only when T is Unpin
seqlock: Change do_io_accounting() to use scoped_seqlock_read()
seqlock: Change do_task_stat() to use scoped_seqlock_read()
seqlock: Change thread_group_cputime() to use scoped_seqlock_read()
seqlock: Introduce scoped_seqlock_read()
documentation: seqlock: fix the wrong documentation of read_seqbegin_or_lock/need_seqretry
atomic: Skip alignment check for try_cmpxchg() old arg
rust: lock: Add a Pin<&mut T> accessor
rust: lock: Pin the inner data
rust: lock: guard: Add T: Unpin bound to DerefMut
locking/spinlock/debug: Fix data-race in do_raw_write_lock
|
|
|
Linus Torvalds
|
1b5dd29869 |
vfs-6.19-rc1.fd_prepare.fs
-----BEGIN PGP SIGNATURE-----
iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCaSmOZwAKCRCRxhvAZXjc
op0AAP4oNVJkFyvgKoPos5K2EGFB8M7merGhpYtsOoeg8UK6OwD/UySQErHsXQDR
sUDDa5uFOhfrkcfM8REtAN4wF8p5qAc=
=QgFD
-----END PGP SIGNATURE-----
Merge tag 'vfs-6.19-rc1.fd_prepare.fs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull fd prepare updates from Christian Brauner:
"This adds the FD_ADD() and FD_PREPARE() primitive. They simplify the
common pattern of get_unused_fd_flags() + create file + fd_install()
that is used extensively throughout the kernel and currently requires
cumbersome cleanup paths.
FD_ADD() - For simple cases where a file is installed immediately:
fd = FD_ADD(O_CLOEXEC, vfio_device_open_file(device));
if (fd < 0)
vfio_device_put_registration(device);
return fd;
FD_PREPARE() - For cases requiring access to the fd or file, or
additional work before publishing:
FD_PREPARE(fdf, O_CLOEXEC, sync_file->file);
if (fdf.err) {
fput(sync_file->file);
return fdf.err;
}
data.fence = fd_prepare_fd(fdf);
if (copy_to_user((void __user *)arg, &data, sizeof(data)))
return -EFAULT;
return fd_publish(fdf);
The primitives are centered around struct fd_prepare. FD_PREPARE()
encapsulates all allocation and cleanup logic and must be followed by
a call to fd_publish() which associates the fd with the file and
installs it into the caller's fdtable. If fd_publish() isn't called,
both are deallocated automatically. FD_ADD() is a shorthand that does
fd_publish() immediately and never exposes the struct to the caller.
I've implemented this in a way that it's compatible with the cleanup
infrastructure while also being usable separately. IOW, it's centered
around struct fd_prepare which is aliased to class_fd_prepare_t and so
we can make use of all the basica guard infrastructure"
* tag 'vfs-6.19-rc1.fd_prepare.fs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (42 commits)
io_uring: convert io_create_mock_file() to FD_PREPARE()
file: convert replace_fd() to FD_PREPARE()
vfio: convert vfio_group_ioctl_get_device_fd() to FD_ADD()
tty: convert ptm_open_peer() to FD_ADD()
ntsync: convert ntsync_obj_get_fd() to FD_PREPARE()
media: convert media_request_alloc() to FD_PREPARE()
hv: convert mshv_ioctl_create_partition() to FD_ADD()
gpio: convert linehandle_create() to FD_PREPARE()
pseries: port papr_rtas_setup_file_interface() to FD_ADD()
pseries: convert papr_platform_dump_create_handle() to FD_ADD()
spufs: convert spufs_gang_open() to FD_PREPARE()
papr-hvpipe: convert papr_hvpipe_dev_create_handle() to FD_PREPARE()
spufs: convert spufs_context_open() to FD_PREPARE()
net/socket: convert __sys_accept4_file() to FD_ADD()
net/socket: convert sock_map_fd() to FD_ADD()
net/kcm: convert kcm_ioctl() to FD_PREPARE()
net/handshake: convert handshake_nl_accept_doit() to FD_PREPARE()
secretmem: convert memfd_secret() to FD_ADD()
memfd: convert memfd_create() to FD_ADD()
bpf: convert bpf_token_create() to FD_PREPARE()
...
|
|
|
Linus Torvalds
|
1d18101a64 |
kernel-6.19-rc1.cred
-----BEGIN PGP SIGNATURE-----
iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCaSmOZQAKCRCRxhvAZXjc
orJLAP9UD+dX6cicJDkzFZowDakmoIQkR5ZSDwChSlmvLcmquwEAlSq4svVd9Bdl
7kOFUk71DqhVHrPAwO7ap0BxehokEAA=
=Cli6
-----END PGP SIGNATURE-----
Merge tag 'kernel-6.19-rc1.cred' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull cred guard updates from Christian Brauner:
"This contains substantial credential infrastructure improvements
adding guard-based credential management that simplifies code and
eliminates manual reference counting in many subsystems.
Features:
- Kernel Credential Guards
Add with_kernel_creds() and scoped_with_kernel_creds() guards that
allow using the kernel credentials without allocating and copying
them. This was requested by Linus after seeing repeated
prepare_kernel_creds() calls that duplicate the kernel credentials
only to drop them again later.
The new guards completely avoid the allocation and never expose the
temporary variable to hold the kernel credentials anywhere in
callers.
- Generic Credential Guards
Add scoped_with_creds() guards for the common override_creds() and
revert_creds() pattern. This builds on earlier work that made
override_creds()/revert_creds() completely reference count free.
- Prepare Credential Guards
Add prepare credential guards for the more complex pattern of
preparing a new set of credentials and overriding the current
credentials with them:
- prepare_creds()
- modify new creds
- override_creds()
- revert_creds()
- put_cred()
Cleanups:
- Make init_cred static since it should not be directly accessed
- Add kernel_cred() helper to properly access the kernel credentials
- Fix scoped_class() macro that was introduced two cycles ago
- coredump: split out do_coredump() from vfs_coredump() for cleaner
credential handling
- coredump: move revert_cred() before coredump_cleanup()
- coredump: mark struct mm_struct as const
- coredump: pass struct linux_binfmt as const
- sev-dev: use guard for path"
* tag 'kernel-6.19-rc1.cred' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (36 commits)
trace: use override credential guard
trace: use prepare credential guard
coredump: use override credential guard
coredump: use prepare credential guard
coredump: split out do_coredump() from vfs_coredump()
coredump: mark struct mm_struct as const
coredump: pass struct linux_binfmt as const
coredump: move revert_cred() before coredump_cleanup()
sev-dev: use override credential guards
sev-dev: use prepare credential guard
sev-dev: use guard for path
cred: add prepare credential guard
net/dns_resolver: use credential guards in dns_query()
cgroup: use credential guards in cgroup_attach_permissions()
act: use credential guards in acct_write_process()
smb: use credential guards in cifs_get_spnego_key()
nfs: use credential guards in nfs_idmap_get_key()
nfs: use credential guards in nfs_local_call_write()
nfs: use credential guards in nfs_local_call_read()
erofs: use credential guards
...
|
|
Zqiang
|
1dd6c84f1c |
sched_ext: Fix incorrect sched_class settings for per-cpu migration tasks
When loading the ebpf scheduler, the tasks in the scx_tasks list will
be traversed and invoke __setscheduler_class() to get new sched_class.
however, this would also incorrectly set the per-cpu migration
task's->sched_class to rt_sched_class, even after unload, the per-cpu
migration task's->sched_class remains sched_rt_class.
The log for this issue is as follows:
./scx_rustland --stats 1
[ 199.245639][ T630] sched_ext: "rustland" does not implement cgroup cpu.weight
[ 199.269213][ T630] sched_ext: BPF scheduler "rustland" enabled
04:25:09 [INFO] RustLand scheduler attached
bpftrace -e 'iter:task /strcontains(ctx->task->comm, "migration")/
{ printf("%s:%d->%pS\n", ctx->task->comm, ctx->task->pid, ctx->task->sched_class); }'
Attaching 1 probe...
migration/0:24->rt_sched_class+0x0/0xe0
migration/1:27->rt_sched_class+0x0/0xe0
migration/2:33->rt_sched_class+0x0/0xe0
migration/3:39->rt_sched_class+0x0/0xe0
migration/4:45->rt_sched_class+0x0/0xe0
migration/5:52->rt_sched_class+0x0/0xe0
migration/6:58->rt_sched_class+0x0/0xe0
migration/7:64->rt_sched_class+0x0/0xe0
sched_ext: BPF scheduler "rustland" disabled (unregistered from user space)
EXIT: unregistered from user space
04:25:21 [INFO] Unregister RustLand scheduler
bpftrace -e 'iter:task /strcontains(ctx->task->comm, "migration")/
{ printf("%s:%d->%pS\n", ctx->task->comm, ctx->task->pid, ctx->task->sched_class); }'
Attaching 1 probe...
migration/0:24->rt_sched_class+0x0/0xe0
migration/1:27->rt_sched_class+0x0/0xe0
migration/2:33->rt_sched_class+0x0/0xe0
migration/3:39->rt_sched_class+0x0/0xe0
migration/4:45->rt_sched_class+0x0/0xe0
migration/5:52->rt_sched_class+0x0/0xe0
migration/6:58->rt_sched_class+0x0/0xe0
migration/7:64->rt_sched_class+0x0/0xe0
This commit therefore generate a new scx_setscheduler_class() and
add check for stop_sched_class to replace __setscheduler_class().
Fixes:
|
|
|
Linus Torvalds
|
415d34b92c |
namespace-6.19-rc1
-----BEGIN PGP SIGNATURE-----
iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCaSmOZQAKCRCRxhvAZXjc
ooKwAP4kR5kMjHlthf8jHmmCjVU3nQFO9hUZsIQL9gFJLOIQMAD+LLoTaq1WJufl
oSgZpREXZVmI1TK61eR6EZMB1YikGAo=
=TExi
-----END PGP SIGNATURE-----
Merge tag 'namespace-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull namespace updates from Christian Brauner:
"This contains substantial namespace infrastructure changes including a new
system call, active reference counting, and extensive header cleanups.
The branch depends on the shared kbuild branch for -fms-extensions support.
Features:
- listns() system call
Add a new listns() system call that allows userspace to iterate
through namespaces in the system. This provides a programmatic
interface to discover and inspect namespaces, addressing
longstanding limitations:
Currently, there is no direct way for userspace to enumerate
namespaces. Applications must resort to scanning /proc/*/ns/ across
all processes, which is:
- Inefficient - requires iterating over all processes
- Incomplete - misses namespaces not attached to any running
process but kept alive by file descriptors, bind mounts, or
parent references
- Permission-heavy - requires access to /proc for many processes
- No ordering or ownership information
- No filtering per namespace type
The listns() system call solves these problems:
ssize_t listns(const struct ns_id_req *req, u64 *ns_ids,
size_t nr_ns_ids, unsigned int flags);
struct ns_id_req {
__u32 size;
__u32 spare;
__u64 ns_id;
struct /* listns */ {
__u32 ns_type;
__u32 spare2;
__u64 user_ns_id;
};
};
Features include:
- Pagination support for large namespace sets
- Filtering by namespace type (MNT_NS, NET_NS, USER_NS, etc.)
- Filtering by owning user namespace
- Permission checks respecting namespace isolation
- Active Reference Counting
Introduce an active reference count that tracks namespace
visibility to userspace. A namespace is visible in the following
cases:
- The namespace is in use by a task
- The namespace is persisted through a VFS object (namespace file
descriptor or bind-mount)
- The namespace is a hierarchical type and is the parent of child
namespaces
The active reference count does not regulate lifetime (that's still
done by the normal reference count) - it only regulates visibility
to namespace file handles and listns().
This prevents resurrection of namespaces that are pinned only for
internal kernel reasons (e.g., user namespaces held by
file->f_cred, lazy TLB references on idle CPUs, etc.) which should
not be accessible via (1)-(3).
- Unified Namespace Tree
Introduce a unified tree structure for all namespaces with:
- Fixed IDs assigned to initial namespaces
- Lookup based solely on inode number
- Maintained list of owned namespaces per user namespace
- Simplified rbtree comparison helpers
Cleanups
- Header Reorganization:
- Move namespace types into separate header (ns_common_types.h)
- Decouple nstree from ns_common header
- Move nstree types into separate header
- Switch to new ns_tree_{node,root} structures with helper functions
- Use guards for ns_tree_lock
- Initial Namespace Reference Count Optimization
- Make all reference counts on initial namespaces a nop to avoid
pointless cacheline ping-pong for namespaces that can never go
away
- Drop custom reference count initialization for initial namespaces
- Add NS_COMMON_INIT() macro and use it for all namespaces
- pid: rely on common reference count behavior
- Miscellaneous Cleanups
- Rename exit_task_namespaces() to exit_nsproxy_namespaces()
- Rename is_initial_namespace() and make argument const
- Use boolean to indicate anonymous mount namespace
- Simplify owner list iteration in nstree
- nsfs: raise SB_I_NODEV, SB_I_NOEXEC, and DCACHE_DONTCACHE explicitly
- nsfs: use inode_just_drop()
- pidfs: raise DCACHE_DONTCACHE explicitly
- pidfs: simplify PIDFD_GET__NAMESPACE ioctls
- libfs: allow to specify s_d_flags
- cgroup: add cgroup namespace to tree after owner is set
- nsproxy: fix free_nsproxy() and simplify create_new_namespaces()
Fixes:
- setns(pidfd, ...) race condition
Fix a subtle race when using pidfds with setns(). When the target
task exits after prepare_nsset() but before commit_nsset(), the
namespace's active reference count might have been dropped. If
setns() then installs the namespaces, it would bump the active
reference count from zero without taking the required reference on
the owner namespace, leading to underflow when later decremented.
The fix resurrects the ownership chain if necessary - if the caller
succeeded in grabbing passive references, the setns() should
succeed even if the target task exits or gets reaped.
- Return EFAULT on put_user() error instead of success
- Make sure references are dropped outside of RCU lock (some
namespaces like mount namespace sleep when putting the last
reference)
- Don't skip active reference count initialization for network
namespace
- Add asserts for active refcount underflow
- Add asserts for initial namespace reference counts (both passive
and active)
- ipc: enable is_ns_init_id() assertions
- Fix kernel-doc comments for internal nstree functions
- Selftests
- 15 active reference count tests
- 9 listns() functionality tests
- 7 listns() permission tests
- 12 inactive namespace resurrection tests
- 3 threaded active reference count tests
- commit_creds() active reference tests
- Pagination and stress tests
- EFAULT handling test
- nsid tests fixes"
* tag 'namespace-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (103 commits)
pidfs: simplify PIDFD_GET_<type>_NAMESPACE ioctls
nstree: fix kernel-doc comments for internal functions
nsproxy: fix free_nsproxy() and simplify create_new_namespaces()
selftests/namespaces: fix nsid tests
ns: drop custom reference count initialization for initial namespaces
pid: rely on common reference count behavior
ns: add asserts for initial namespace active reference counts
ns: add asserts for initial namespace reference counts
ns: make all reference counts on initial namespace a nop
ipc: enable is_ns_init_id() assertions
fs: use boolean to indicate anonymous mount namespace
ns: rename is_initial_namespace()
ns: make is_initial_namespace() argument const
nstree: use guards for ns_tree_lock
nstree: simplify owner list iteration
nstree: switch to new structures
nstree: add helper to operate on struct ns_tree_{node,root}
nstree: move nstree types into separate header
nstree: decouple from ns_common header
ns: move namespace types into separate header
...
|
|
|
Linus Torvalds
|
b04b2e7a61 |
vfs-6.19-rc1.misc
-----BEGIN PGP SIGNATURE-----
iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCaSmOZAAKCRCRxhvAZXjc
onGCAQDEHKNEuZMhkyd3K5YsJtMzZlW/uXp4+Wddeob+5yQp0wEA09xN4CJNMwhP
J6Kjaa80hWfrFacqSvyMUwQHHw6mngs=
=5Mom
-----END PGP SIGNATURE-----
Merge tag 'vfs-6.19-rc1.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull misc vfs updates from Christian Brauner:
"Features:
- Cheaper MAY_EXEC handling for path lookup. This elides MAY_WRITE
permission checks during path lookup and adds the
IOP_FASTPERM_MAY_EXEC flag so filesystems like btrfs can avoid
expensive permission work.
- Hide dentry_cache behind runtime const machinery.
- Add German Maglione as virtiofs co-maintainer.
Cleanups:
- Tidy up and inline step_into() and walk_component() for improved
code generation.
- Re-enable IOCB_NOWAIT writes to files. This refactors file
timestamp update logic, fixing a layering bypass in btrfs when
updating timestamps on device files and improving FMODE_NOCMTIME
handling in VFS now that nfsd started using it.
- Path lookup optimizations extracting slowpaths into dedicated
routines and adding branch prediction hints for mntput_no_expire(),
fd_install(), lookup_slow(), and various other hot paths.
- Enable clang's -fms-extensions flag, requiring a JFS rename to
avoid conflicts.
- Remove spurious exports in fs/file_attr.c.
- Stop duplicating union pipe_index declaration. This depends on the
shared kbuild branch that brings in -fms-extensions support which
is merged into this branch.
- Use MD5 library instead of crypto_shash in ecryptfs.
- Use largest_zero_folio() in iomap_dio_zero().
- Replace simple_strtol/strtoul with kstrtoint/kstrtouint in init and
initrd code.
- Various typo fixes.
Fixes:
- Fix emergency sync for btrfs. Btrfs requires an explicit sync_fs()
call with wait == 1 to commit super blocks. The emergency sync path
never passed this, leaving btrfs data uncommitted during emergency
sync.
- Use local kmap in watch_queue's post_one_notification().
- Add hint prints in sb_set_blocksize() for LBS dependency on THP"
* tag 'vfs-6.19-rc1.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (35 commits)
MAINTAINERS: add German Maglione as virtiofs co-maintainer
fs: inline step_into() and walk_component()
fs: tidy up step_into() & friends before inlining
orangefs: use inode_update_timestamps directly
btrfs: fix the comment on btrfs_update_time
btrfs: use vfs_utimes to update file timestamps
fs: export vfs_utimes
fs: lift the FMODE_NOCMTIME check into file_update_time_flags
fs: refactor file timestamp update logic
include/linux/fs.h: trivial fix: regualr -> regular
fs/splice.c: trivial fix: pipes -> pipe's
fs: mark lookup_slow() as noinline
fs: add predicts based on nd->depth
fs: move mntput_no_expire() slowpath into a dedicated routine
fs: remove spurious exports in fs/file_attr.c
watch_queue: Use local kmap in post_one_notification()
fs: touch up predicts in path lookup
fs: move fd_install() slowpath into a dedicated routine and provide commentary
fs: hide dentry_cache behind runtime const machinery
fs: touch predicts in do_dentry_open()
...
|
|
Petr Mladek
|
5cae92e622 | Merge branch 'rework/write_atomic-unsafe' into for-linus | |
|
Petr Mladek
|
4f132d81f9 | Merge branch 'rework/threaded-printk' into for-linus | |
|
Petr Mladek
|
3a9a3f5fb2 | Merge branch 'rework/suspend-fixes' into for-linus | |
|
Petr Mladek
|
b1e6c41ef9 | Merge branch 'rework/preempt-legacy-kthread' into for-linus | |
|
Petr Mladek
|
2d786a5b80 | Merge branch 'rework/nbcon-in-kdb' into for-linus | |
|
Petr Mladek
|
475bb520c3 | Merge branch 'rework/atomic-flush-hardlockup' into for-linus | |
|
Petr Mladek
|
3869e431b5 | Merge branch 'for-6.19-vsprintf-timespec64' into for-linus | |
Sebastian Andrzej Siewior
|
51d7a05452 |
locking/mutex: Redo __mutex_init() to reduce generated code size
mutex_init() invokes __mutex_init() providing the name of the lock and
a pointer to a the lock class. With LOCKDEP enabled this information is
useful but without LOCKDEP it not used at all. Passing the pointer
information of the lock class might be considered negligible but the
name of the lock is passed as well and the string is stored. This
information is wasting storage.
Split __mutex_init() into a _genereic() variant doing the initialisation
of the lock and a _lockdep() version which does _genereic() plus the
lockdep bits. Restrict the lockdep version to lockdep enabled builds
allowing the compiler to remove the unused parameter.
This results in the following size reduction:
text data bss dec filename
| 30237599 8161430 1176624 39575653 vmlinux.defconfig
| 30233269 8149142 1176560 39558971 vmlinux.defconfig.patched
-4.2KiB -12KiB
| 32455099 8471098 12934684 53860881 vmlinux.defconfig.lockdep
| 32455100 8471098 12934684 53860882 vmlinux.defconfig.patched.lockdep
| 27152407 7191822 2068040 36412269 vmlinux.defconfig.preempt_rt
| 27145937 7183630 2067976 36397543 vmlinux.defconfig.patched.preempt_rt
-6.3KiB -8KiB
| 29382020 7505742 13784608 50672370 vmlinux.defconfig.preempt_rt.lockdep
| 29376229 7505742 13784544 50666515 vmlinux.defconfig.patched.preempt_rt.lockdep
-5.6KiB
[peterz: folded fix from boqun]
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Waiman Long <longman@redhat.com>
Link: https://lkml.kernel.org/r/20251125145425.68319-1-boqun.feng@gmail.com
Link: https://patch.msgid.link/20251105142350.Tfeevs2N@linutronix.de
|
|
Frederic Weisbecker
|
9a08942f17 |
Merge branch 'rcu/misc' into next
- In order to prepare the layout for nohz_full work deferral to user exit, the context tracking state must shrink the counter of transitions to/from RCU not watching. The only possible hazard is to trigger wrap-around more easily, delaying a bit grace periods when that happens. This should be a rare event though. Yet add debugging and torture code to test that assumption. - Fix memory leak on locktorture module - Annotate accesses in rculist_nulls.h to prevent from KCSAN warnings. On recent discussions, we also concluded that all those WRITE_ONCE() and READ_ONCE() on list APIs deserve appropriate comments. Something to be expected for the next cycle. - Provide a script to apply several configs to several commits with torture. - Allow torture to reuse a build directory in order to save needless rebuild time. - Various cleanups. |
|
|
Linus Torvalds
|
e69c7c1751 |
- Have timekeeping aux clocks sysfs interface setup function return an
error code on failure instead of success -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEzv7L6UO9uDPlPSfHEsHwGGHeVUoFAmksJ6kACgkQEsHwGGHe VUqxARAAqEqj33/ErgPpytnpRkuJwGCGeSO879MMAoLTFpmALmoQZlqhA+WF1xYw T5QF7nGlBeW/GwFAVlm1riqI6iPk2iUZWczS9bq0wjtR0XNHReCqLGdRe+4DHEjb PtyXMrrQgq5FuvHaIkuSUxBKtyHn+KMObldxp2azpO8nfUubDSCCgw9aQfm2osHi JIldKOPdFKRv8uLnBBbI2A+6cFrqXr/ptAzx8C3hov7sN0jBODOitb7fNerEb+T4 U5awKzpK3WzcilyrlEZMCFXRV5e3naTgnUDd8/7t9m0SA10K5oSIM1zggVLRWN8Z AA7XMpbRAl1S23GUVjSAM/vOMmaJJAuIMJ4ZXIKoTFVQJ3kenzY4GtDdObh05ID4 971y0hXrko74Qq42oME4UHSKexcR4vIBwXC0J9g04EbtKQ/sm6uhoUlb2Xb/UfxR CPxzDqy1pFkjuMG49yu3JE2fUHOryiRcNUUgas2PBKjKG0KyZPcJWa/fRsk5LlLy oeUXx/hXOq6Nw0ydyzI7iJgAM5SbM4A5p/hxlWmQnfXJ2EQdmkORTmMkloaUvB7u vWaOd9I+D3iSzNaw4zP0kzgPRX70PCRn1qakT3zQ340c9vNT/lYQjRelK7gfYZF6 HOBID2Pl3+pqUTfli6qxbXsgqH4hbCWSomDbY9t2AFK6h6K2l8Q= =CFYj -----END PGP SIGNATURE----- Merge tag 'timers_urgent_for_v6.18_rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timer fix from Borislav Petkov: - Have timekeeping aux clocks sysfs interface setup function return an error code on failure instead of success * tag 'timers_urgent_for_v6.18_rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: timekeeping: Fix error code in tk_aux_sysfs_init() |
|
Ritesh Oedayrajsingh Varma
|
ff34657aa7 |
bpf: optimize bpf_map_update_elem() for map-in-map types
Updating a BPF_MAP_TYPE_HASH_OF_MAPS or BPF_MAP_TYPE_ARRAY_OF_MAPS via
bpf_map_update_elem() is very expensive.
In one of our workloads, we're inserting ~1400 maps of type
BPF_MAP_TYPE_ARRAY into a BPF_MAP_TYPE_ARRAY_OF_MAPS. This takes ~21
seconds on a single thread, with an average of ~15ms per call:
Function Name: map_update_elem
Number of calls: 1369
Total time: 21s 182ms 966µs
Maximum: 47ms 937µs
Average: 15ms 473µs
Minimum: 7µs
Profiling shows that nearly all of this time is going to synchronize_rcu(),
via maybe_wait_bpf_programs() in map_update_elem().
The call to synchronize_rcu() is done to ensure that after
bpf_map_update_elem() returns, no BPF programs are still looking at the old
value of the map, per commit
|
|
Menglong Dong
|
c1af4465b9 |
bpf: make kprobe_multi_link_prog_run always_inline
Make kprobe_multi_link_prog_run() always inline to obtain better performance. Before this patch, the bench performance is: ./bench trig-kprobe-multi Setting up benchmark 'trig-kprobe-multi'... Benchmark 'trig-kprobe-multi' started. Iter 0 ( 95.485us): hits 62.462M/s ( 62.462M/prod), [...] Iter 1 (-80.054us): hits 62.486M/s ( 62.486M/prod), [...] Iter 2 ( 13.572us): hits 62.287M/s ( 62.287M/prod), [...] Iter 3 ( 76.961us): hits 62.293M/s ( 62.293M/prod), [...] Iter 4 (-77.698us): hits 62.394M/s ( 62.394M/prod), [...] Iter 5 (-13.399us): hits 62.319M/s ( 62.319M/prod), [...] Iter 6 ( 77.573us): hits 62.250M/s ( 62.250M/prod), [...] Summary: hits 62.338 ± 0.083M/s ( 62.338M/prod) And after this patch, the performance is: Iter 0 (454.148us): hits 66.900M/s ( 66.900M/prod), [...] Iter 1 (-435.540us): hits 68.925M/s ( 68.925M/prod), [...] Iter 2 ( 8.223us): hits 68.795M/s ( 68.795M/prod), [...] Iter 3 (-12.347us): hits 68.880M/s ( 68.880M/prod), [...] Iter 4 ( 2.291us): hits 68.767M/s ( 68.767M/prod), [...] Iter 5 ( -1.446us): hits 68.756M/s ( 68.756M/prod), [...] Iter 6 ( 13.882us): hits 68.657M/s ( 68.657M/prod), [...] Summary: hits 68.792 ± 0.087M/s ( 68.792M/prod) As we can see, the performance of kprobe-multi increase from 62M/s to 68M/s. Signed-off-by: Menglong Dong <dongml2@chinatelecom.cn> Link: https://lore.kernel.org/r/20251126085246.309942-1-dongml2@chinatelecom.cn Signed-off-by: Alexei Starovoitov <ast@kernel.org> |
|
Kumar Kartikeya Dwivedi
|
087849cca3 |
rqspinlock: Precede non-head waiter queueing with AA check
While previous commits sufficiently address the deadlocks, there are still scenarios where queueing of waiters in NMIs can exacerbate the possibility of timeouts. Consider the case below: CPU 0 <NMI> res_spin_lock(A) -> becomes non-head waiter </NMI> lock owner in CS or pending waiter spinning CPU 1 res_spin_lock(A) -> head waiter spinning on owner/pending bits In such a scenario, the non-head waiter in NMI on CPU 0 will not poll for deadlocks or timeout since it will simply queue behind previous waiter (head on CPU 1), and also not enter the trylock fallback since no rqspinlock queue waiter is active on CPU 0. In such a scenario, the transaction initiated by the head waiter on CPU 1 will timeout, signalling the NMI and ending the cyclic dependency, but it will cost 250 ms of time. Instead, the NMI on CPU 0 could simply check for the presence of an AA deadlock and only proceed with queueing on success. Add such a check right before any form of queueing is initiated. The reason the AA deadlock check is not used in conjunction with in_nmi() is that a similar case could occur due to a reentrant path in the owner's critical section, and unconditionally checking for AA before entering the queueing path avoids expensive timeouts. Non-NMI reentrancy only happens at controlled points in the slow path (with specific tracepoints which do not impede the forward progress of a waiter loop), or in the owner CS, while NMIs can land anywhere. While this check is only needed for non-head waiter queueing, checking whether we are head or not is racy without xchg_tail, and after that point, we are already queued, hence for simplicity we must invoke the check unconditionally. Note that a more contrived case could still be constructed by using two locks, and interrupting the progress of the respective owners by non-head waiters of the other lock, in an ABBA fashion, which would still not be covered by the current set of checks and conditions. It would still lead to a timeout though, and not a deadlock. An ABBA check cannot happen optimistically before the queueing, since it can be racy, and needs to be happen continuously during the waiting period, which would then require an unlinking step for queued NMI/reentrant waiters. This is beyond the scope of this patch. Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Link: https://lore.kernel.org/r/20251128232802.1031906-6-memxor@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org> |
|
|
Kumar Kartikeya Dwivedi
|
30dc2f7025 |
rqspinlock: Disable spinning for trylock fallback
The original trylock fallback was inherited from qspinlock, and then reused for the reentrant NMIs while the slow path is active. However, under contention, it is very unlikely for the trylock to succeed in taking the lock. In addition, a trylock also has no fairness guarantees, and thus is prone to starvation issues under extreme scenarios. The original qspinlock had no choice in terms of returning an error the caller; if the node count was breached, it had to fall back to trylock to attempt to take the lock. In case of rqspinlock, we do have the option of returning to the user. Thus, simply attempt the trylock once, and instead of spinning, return an error in case the lock cannot be taken. This ends up significantly reducing the time spent in the trylock fallback, since we no longer wait for the timeout duration trying to aimlessly acquire the lock when there's a high-probability that under contention, it won't be available to us anyway. Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Link: https://lore.kernel.org/r/20251128232802.1031906-5-memxor@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org> |
|
|
Kumar Kartikeya Dwivedi
|
81d5a6a438 |
rqspinlock: Use trylock fallback when per-CPU rqnode is busy
In addition to deferring to the trylock fallback in NMIs, only do so
when an rqspinlock waiter is queued on the current CPU. This is detected
by noticing a non-zero node index. This allows NMI waiters to join the
waiter queue if it isn't interrupting an existing rqspinlock waiter, and
increase the chances of fairly obtaining the lock, performing deadlock
detection as the head, and not being starved while attempting the
trylock.
The trylock path in particular is unlikely to succeed under contention,
as it relies on the lock word becoming 0, which indicates no contention.
This means that the most likely result for NMIs attempting a trylock is
a timeout under contention if they don't hit an AA or ABBA case.
The core problem being addressed through the fixed commit was removing
the dependency edge between an NMI queue waiter and the queue waiter it
is interrupting. Whenever a circular dependency forms, and with no way
to break it (as non-head waiters don't poll for deadlocks or timeouts),
we would enter into a deadlock. A trylock either breaks such an edge by
probing for deadlocks, and finally terminating the waiting loop using a
timeout.
By excluding queueing on CPUs where the node index is non-zero for NMIs,
this sort of dependency is broken. The CPU enters the trylock path for
those cases, and falls back to deadlock checks and timeouts. However, in
other case where it doesn't interrupt the CPU in the slow path while its
queued on the lock, it can join the queue as a normal waiter, and avoid
trylock associated starvation and subsequent timeouts.
There are a few remaining cases here that matter: the NMI can still
preempt the owner in its critical section, and if it queues as a
non-head waiter, it can end up impeding the progress of the owner. While
this won't deadlock, since the head waiter will eventually signal the
NMI waiter to either stop (due to a timeout), it can still lead to long
timeouts. These gaps will be addressed in subsequent commits.
Note that while the node count detection approach is less conservative
than simply deferring NMIs to trylock, it is going to return errors
where attempts to lock B in NMI happen while waiters for lock A are in a
lower context on the same CPU. However, this only occurs when the lower
context is queued in the slow path, and the NMI attempt can proceed
without failure in all other cases. To continue to prevent AA deadlocks
(or ABBA in a similar NMI interrupting lower context pattern), we'd need
a more fleshed out algorithm to unlink NMI waiters after they queue and
detect such cases. However, all that complexity isn't appealing yet to
reduce the failure rate in the small window inside the slow path.
It is important to note that reentrancy in the slow path can also happen
through trace_contention_{begin,end}, but in those cases, unlike an NMI,
the forward progress of the head waiter (or the predecessor in general)
is not being blocked.
Fixes:
|
|
|
Kumar Kartikeya Dwivedi
|
5860f5ce47 |
rqspinlock: Perform AA checks immediately
Currently, while we enter the check_timeout call immediately due to the way the ts.spin is initialized, we still invoke the AA and ABBA checks in the second invocation, and only initialize the timestamp in the first one. Since each iteration is at least done with a 1ms delay, this can add delays in detection of AA deadlocks, up to a ms. Rework check_timeout() to avoid this. First, call check_deadlock_AA() while initializing the timestamps for the wait period. This also means that we only do it once per waiting period, instead of every invocation. Finally, drop check_deadlock() and call check_deadlock_ABBA() directly. To save on unnecessary ktime_get_mono_fast_ns() in case of AA deadlock, sample the time only if it returns 0. Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Link: https://lore.kernel.org/r/20251128232802.1031906-3-memxor@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org> |
|
|
Kumar Kartikeya Dwivedi
|
beb7021a60 |
rqspinlock: Enclose lock/unlock within lock entry acquisitions
Ritesh reported that timeouts occurred frequently for rqspinlock despite
reentrancy on the same lock on the same CPU in [0]. This patch closes
one of the races leading to this behavior, and reduces the frequency of
timeouts.
We currently have a tiny window between the fast-path cmpxchg and the
grabbing of the lock entry where an NMI could land, attempt the same
lock that was just acquired, and end up timing out. This is not ideal.
Instead, move the lock entry acquisition from the fast path to before
the cmpxchg, and remove the grabbing of the lock entry in the slow path,
assuming it was already taken by the fast path. The TAS fallback is
invoked directly without being preceded by the typical fast path,
therefore we must continue to grab the deadlock detection entry in that
case.
Case on lock leading to missed AA:
cmpxchg lock A
<NMI>
... rqspinlock acquisition of A
... timeout
</NMI>
grab_held_lock_entry(A)
There is a similar case when unlocking the lock. If the NMI lands
between the WRITE_ONCE and smp_store_release, it is possible that we end
up in a situation where the NMI fails to diagnose the AA condition,
leading to a timeout.
Case on unlock leading to missed AA:
WRITE_ONCE(rqh->locks[rqh->cnt - 1], NULL)
<NMI>
... rqspinlock acquisition of A
... timeout
</NMI>
smp_store_release(A->locked, 0)
The patch changes the order on unlock to smp_store_release() succeeded
by WRITE_ONCE() of NULL. This avoids the missed AA detection described
above, but may lead to a false positive if the NMI lands between these
two statements, which is acceptable (and preferred over a timeout).
The original intention of the reverse order on unlock was to prevent the
following possible misdiagnosis of an ABBA scenario:
grab entry A
lock A
grab entry B
lock B
unlock B
smp_store_release(B->locked, 0)
grab entry B
lock B
grab entry A
lock A
! <detect ABBA>
WRITE_ONCE(rqh->locks[rqh->cnt - 1], NULL)
If the store release were is after the WRITE_ONCE, the other CPU would
not observe B in the table of the CPU unlocking the lock B. However,
since the threads are obviously participating in an ABBA deadlock, it
is no longer appealing to use the order above since it may lead to a
250 ms timeout due to missed AA detection.
[0]: https://lore.kernel.org/bpf/CAH6OuBTjG+N=+GGwcpOUbeDN563oz4iVcU3rbse68egp9wj9_A@mail.gmail.com
Fixes:
|