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linux/drivers
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Marco Crivellari d7b1cdc910 drivers/block: WQ_PERCPU added to alloc_workqueue users 
Currently if a user enqueue a work item using schedule_delayed_work() the
used wq is "system_wq" (per-cpu wq) while queue_delayed_work() use
WORK_CPU_UNBOUND (used when a cpu is not specified). The same applies to
schedule_work() that is using system_wq and queue_work(), that makes use
again of WORK_CPU_UNBOUND.
This lack of consistentcy cannot be addressed without refactoring the API.

alloc_workqueue() treats all queues as per-CPU by default, while unbound
workqueues must opt-in via WQ_UNBOUND.

This default is suboptimal: most workloads benefit from unbound queues,
allowing the scheduler to place worker threads where they’re needed and
reducing noise when CPUs are isolated.

This default is suboptimal: most workloads benefit from unbound queues,
allowing the scheduler to place worker threads where they’re needed and
reducing noise when CPUs are isolated.

This patch adds a new WQ_PERCPU flag to explicitly request the use of
the per-CPU behavior. Both flags coexist for one release cycle to allow
callers to transition their calls.

Once migration is complete, WQ_UNBOUND can be removed and unbound will
become the implicit default.

With the introduction of the WQ_PERCPU flag (equivalent to !WQ_UNBOUND),
any alloc_workqueue() caller that doesn’t explicitly specify WQ_UNBOUND
must now use WQ_PERCPU.

All existing users have been updated accordingly.

Suggested-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Marco Crivellari <marco.crivellari@suse.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
 		2025-09-09 09:11:31 -06:00
..
accel Merge drm/drm-fixes into drm-misc-fixes 2025-08-20 16:08:49 +02:00
accessibility
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acpi Merge branches 'acpi-apei' and 'acpi-pfrut' 2025-08-21 20:47:23 +02:00
amba
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android Char / Misc / IIO / other driver updates for 6.17-rc1 2025-07-29 09:52:01 -07:00
ata switching ->getgeo() from struct block_device to struct gendisk 2025-09-03 15:15:43 -06:00
atm
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auxdisplay
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base regmap: Fixes for v6.17 2025-08-09 08:40:28 +03:00
bcma treewide: rename GPIO set callbacks back to their original names 2025-08-07 10:07:06 +02:00
block drivers/block: WQ_PERCPU added to alloc_workqueue users 2025-09-09 09:11:31 -06:00
bluetooth Bluetooth: btnxpuart: Uses threaded IRQ for host wakeup handling 2025-08-15 10:13:26 -04:00
bus soc: driver updates for 6.17 2025-07-29 11:13:27 -07:00
cache
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cdrom cdrom: Call cdrom_mrw_exit from cdrom_release function 2025-07-22 19:10:17 -06:00
cdx cdx: Fix off-by-one error in cdx_rpmsg_probe() 2025-08-19 12:55:16 +02:00
char Some small fixes for the IPMI driver 2025-08-07 07:38:25 +03:00
clk This is the usual collection of primarily clk driver updates. The big part of 2025-07-31 13:36:27 -07:00
clocksource A treewide cleanup of struct cycle_counter const annotations: 2025-07-29 14:02:53 -07:00
comedi comedi: Make insn_rw_emulate_bits() do insn->n samples 2025-08-19 12:57:01 +02:00
connector
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counter
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cpufreq cpufreq: intel_pstate: Support Clearwater Forest OOB mode 2025-08-11 21:49:47 +02:00
cpuidle cpuidle: governors: menu: Avoid selecting states with too much latency 2025-08-18 19:04:25 +02:00
crypto This update includes the following changes: 2025-07-31 09:45:28 -07:00
cxl Significant patch series in this pull request: 2025-08-03 16:23:09 -07:00
dax
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dca
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devfreq
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dio
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dma dmaengine updates for v6.17 2025-08-01 12:35:12 -07:00
dma-buf drm for 6.17-rc1 2025-07-30 19:26:49 -07:00
dpll dpll: zl3073x: ZL3073X_I2C and ZL3073X_SPI should depend on NET 2025-08-04 17:22:55 -07:00
edac - i10nm: 2025-07-29 16:30:38 -07:00
eisa
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extcon
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firewire firewire: core: reallocate buffer for FCP address handlers when more than 4 are registered 2025-08-03 21:20:15 +09:00
firmware EFI updates for v6.17 2025-08-09 18:10:01 +03:00
fpga fpga: zynq_fpga: Fix the wrong usage of dma_map_sgtable() 2025-08-19 12:54:45 +02:00
fsi Driver core changes for 6.17-rc1 2025-07-29 12:15:39 -07:00
fwctl
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gnss
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gpio gpio: mlxbf3: use platform_get_irq_optional() 2025-08-12 15:40:28 +02:00
gpu - xe_vm_create fixes (Piotr) 2025-08-23 07:24:52 +10:00
greybus
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hid treewide: rename GPIO set callbacks back to their original names 2025-08-07 10:07:06 +02:00
hsi
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hte
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hv ARM: 2025-07-30 17:14:01 -07:00
hwmon treewide: rename GPIO set callbacks back to their original names 2025-08-07 10:07:06 +02:00
hwspinlock
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hwtracing
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i2c i2c: rtl9300: Add missing count byte for SMBus Block Ops 2025-08-19 20:21:03 -01:00
i3c i3c: add missing include to internal header 2025-07-31 02:25:17 +02:00
idle intel_idle: Allow loading ACPI tables for any family 2025-08-11 21:43:26 +02:00
iio iio: pressure: bmp280: Use IS_ERR() in bmp280_common_probe() 2025-08-18 19:22:18 +01:00
infiniband RDMA/hns: Fix dip entries leak on devices newer than hip09 2025-08-13 07:22:18 -04:00
input treewide: rename GPIO set callbacks back to their original names 2025-08-07 10:07:06 +02:00
interconnect Char / Misc / IIO / other driver updates for 6.17-rc1 2025-07-29 09:52:01 -07:00
iommu iommufd 6.17 first rc pull 2025-08-22 17:24:48 -04:00
ipack
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irqchip irqchip/mvebu-gicp: Use resource_size() for ioremap() 2025-08-06 17:00:40 +02:00
isdn
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leds treewide: rename GPIO set callbacks back to their original names 2025-08-07 10:07:06 +02:00
macintosh
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mailbox mailbox/pcc: support mailbox management of the shared buffer 2025-08-07 23:49:56 -05:00
mcb mcb: use sysfs_emit_at() instead of scnprintf() in show functions 2025-07-16 14:17:07 +02:00
md block: remove the bi_inline_vecs variable sized array from struct bio 2025-09-09 07:31:59 -06:00
media treewide: rename GPIO set callbacks back to their original names 2025-08-07 10:07:06 +02:00
memory Memory controller drivers for v6.17 2025-07-22 22:47:00 +02:00
memstick switching ->getgeo() from struct block_device to struct gendisk 2025-09-03 15:15:43 -06:00
message scsi: switch ->bios_param() to passing gendisk 2025-08-13 02:59:28 -04:00
mfd treewide: rename GPIO set callbacks back to their original names 2025-08-07 10:07:06 +02:00
misc treewide: rename GPIO set callbacks back to their original names 2025-08-07 10:07:06 +02:00
mmc switching ->getgeo() from struct block_device to struct gendisk 2025-09-03 15:15:43 -06:00
most most: core: Drop device reference after usage in get_channel() 2025-08-19 12:57:34 +02:00
mtd block: switch ->getgeo() to struct gendisk 2025-08-13 02:59:29 -04:00
mux hardening updates for v6.17-rc1 2025-07-28 17:16:12 -07:00
net net/mlx5e: Preserve shared buffer capacity during headroom updates 2025-08-21 07:58:33 -07:00
nfc
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ntb
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nubus
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nvdimm block: switch ->getgeo() to struct gendisk 2025-08-13 02:59:29 -04:00
nvme switching ->getgeo() from struct block_device to struct gendisk 2025-09-03 15:15:43 -06:00
nvmem Driver core changes for 6.17-rc1 2025-07-29 12:15:39 -07:00
of ARM: 2025-07-30 17:14:01 -07:00
opp
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parisc parisc/power: Move soft-power into power.c 2025-07-23 11:52:48 +02:00
parport
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pci PCI: vmd: Remove MSI-X check on child devices 2025-08-12 13:45:01 -05:00
pcmcia
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peci
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perf
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phy phy-for-6.17 2025-08-01 12:31:50 -07:00
pinctrl treewide: rename GPIO set callbacks back to their original names 2025-08-07 10:07:06 +02:00
platform platform/x86: hp-wmi: mark Victus 16-r1xxx for victus_s fan and thermal profile support 2025-08-12 15:23:09 +03:00
pmdomain pmdomain: qcom: rpmhpd: Add Glymur RPMh Power Domains 2025-07-23 12:12:16 +02:00
pnp
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power power supply and reset changes for the 6.17 series 2025-07-31 21:39:01 -07:00
powercap platform-drivers-x86 for v6.17-1 2025-07-28 23:21:28 -07:00
pps
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ps3
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ptp ptp: prevent possible ABBA deadlock in ptp_clock_freerun() 2025-08-12 14:17:35 -07:00
pwm treewide: rename GPIO set callbacks back to their original names 2025-08-07 10:07:06 +02:00
rapidio
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ras
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regulator regulator: tps65219: regulator: tps65219: Fix error codes in probe() 2025-08-19 16:51:03 +01:00
remoteproc remoteproc updates for v6.17 2025-08-01 15:02:25 -07:00
reset This is the usual collection of primarily clk driver updates. The big part of 2025-07-31 13:36:27 -07:00
rpmsg remoteproc updates for v6.17 2025-08-01 15:02:25 -07:00
rtc RTC for 6.17 2025-08-03 20:17:34 -07:00
s390 switching ->getgeo() from struct block_device to struct gendisk 2025-09-03 15:15:43 -06:00
sbus
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scsi switching ->getgeo() from struct block_device to struct gendisk 2025-09-03 15:15:43 -06:00
sh
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siox
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slimbus
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soc soc/tegra: pmc: Ensure power-domains are in a known state 2025-08-11 12:24:43 +02:00
soundwire soundwire updates for 6.17 2025-08-01 11:09:27 -07:00
spi spi: Fixes for v6.17 2025-08-21 16:28:00 -04:00
spmi
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ssb treewide: rename GPIO set callbacks back to their original names 2025-08-07 10:07:06 +02:00
staging treewide: rename GPIO set callbacks back to their original names 2025-08-07 10:07:06 +02:00
target block: add a bio_init_inline helper 2025-09-09 07:31:59 -06:00
tc
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tee
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thermal Driver core changes for 6.17-rc1 2025-07-29 12:15:39 -07:00
thunderbolt thunderbolt: Fix copy+paste error in match_service_id() 2025-07-21 16:33:43 +02:00
tty module: Rename EXPORT_SYMBOL_GPL_FOR_MODULES to EXPORT_SYMBOL_FOR_MODULES 2025-08-11 16:16:36 +02:00
ufs scsi: ufs: ufs-qcom: Fix ESI null pointer dereference 2025-08-18 22:25:52 -04:00
uio
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usb usb: xhci: fix host not responding after suspend and resume 2025-08-19 16:12:13 +02:00
vdpa vdpa: Fix IDR memory leak in VDUSE module exit 2025-08-01 09:11:08 -04:00
vfio VFIO updates for v6.17-rc1 v2 2025-08-07 07:32:50 +03:00
vhost vhost: initialize vq->nheads properly 2025-08-05 05:57:40 -04:00
video gpio updates for v6.17-rc1 2025-08-09 08:15:43 +03:00
virt virt: sev-guest: Satisfy linear mapping requirement in get_derived_key() 2025-08-15 17:05:39 +02:00
virtio virtio, vhost: features, fixes 2025-08-01 14:17:48 -07:00
w1
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watchdog watchdog: sbsa: Adjust keepalive timeout to avoid MediaTek WS0 race condition 2025-07-28 12:07:08 +02:00
xen drivers/xen/xenbus: remove quirk for Xen 3.x 2025-08-20 15:47:43 +02:00
zorro
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Kconfig drm for 6.17-rc1 2025-07-30 19:26:49 -07:00
Makefile
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