Bitao Hu d7037381d0 watchdog/softlockup: Low-overhead detection of interrupt storm ... The following softlockup is caused by interrupt storm, but it cannot be identified from the call tree. Because the call tree is just a snapshot and doesn't fully capture the behavior of the CPU during the soft lockup. watchdog: BUG: soft lockup - CPU#28 stuck for 23s! [fio:83921] ... Call trace: __do_softirq+0xa0/0x37c __irq_exit_rcu+0x108/0x140 irq_exit+0x14/0x20 __handle_domain_irq+0x84/0xe0 gic_handle_irq+0x80/0x108 el0_irq_naked+0x50/0x58 Therefore, it is necessary to report CPU utilization during the softlockup_threshold period (report once every sample_period, for a total of 5 reportings), like this: watchdog: BUG: soft lockup - CPU#28 stuck for 23s! [fio:83921] CPU#28 Utilization every 4s during lockup: #1: 0% system, 0% softirq, 100% hardirq, 0% idle #2: 0% system, 0% softirq, 100% hardirq, 0% idle #3: 0% system, 0% softirq, 100% hardirq, 0% idle #4: 0% system, 0% softirq, 100% hardirq, 0% idle #5: 0% system, 0% softirq, 100% hardirq, 0% idle ... This is helpful in determining whether an interrupt storm has occurred or in identifying the cause of the softlockup. The criteria for determination are as follows: a. If the hardirq utilization is high, then interrupt storm should be considered and the root cause cannot be determined from the call tree. b. If the softirq utilization is high, then the call might not necessarily point at the root cause. c. If the system utilization is high, then analyzing the root cause from the call tree is possible in most cases. The mechanism requires a considerable amount of global storage space when configured for the maximum number of CPUs. Therefore, adding a SOFTLOCKUP_DETECTOR_INTR_STORM Kconfig knob that defaults to "yes" if the max number of CPUs is <= 128. Signed-off-by: Bitao Hu <yaoma@linux.alibaba.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Douglas Anderson <dianders@chromium.org> Reviewed-by: Liu Song <liusong@linux.alibaba.com> Link: https://lore.kernel.org/r/20240411074134.30922-5-yaoma@linux.alibaba.com		2024-04-12 17:08:05 +02:00
..
842	…
crypto	crypto: lib/mpi - Fix unexpected pointer access in mpi_ec_init	2023-12-22 12:30:19 +08:00
dim	linux/dim: Do nothing if no time delta between samples	2023-05-09 11:06:45 +02:00
fonts	fbdev fixes and cleanups for 6.9-rc1:	2024-03-22 10:09:08 -07:00
kunit	kunit: test: Log the correct filter string in executor_test	2024-02-27 15:25:50 -07:00
lz4	…
lzo	…
math	mul_u64_u64_div_u64: increase precision by conditionally swapping a and b	2024-03-12 13:09:22 -07:00
pldmfw	lib: remove MODULE_LICENSE in non-modules	2023-04-13 13:13:53 -07:00
raid6	- Kuan-Wei Chiu has developed the well-named series "lib min_heap: Min	2024-03-14 18:03:09 -07:00
reed_solomon	treewide: use get_random_u32_below() instead of deprecated function	2022-11-18 02:15:15 +01:00
test_fortify	string: Remove strlcpy()	2024-01-19 11:59:11 -08:00
vdso	vdso: Improve cmd_vdso_check to check all dynamic relocations	2023-03-21 21:15:34 +01:00
xz	arch: Remove Itanium (IA-64) architecture	2023-09-11 08:13:17 +00:00
zlib_deflate	lib/zlib: DFLTCC deflate does not write all available bits for Z_NO_FLUSH	2023-02-27 17:00:14 -08:00
zlib_dfltcc	lib/zlib: remove redundation assignement of avail_in dfltcc_gdht()	2023-02-02 22:50:10 -08:00
zlib_inflate	lib/zlib: Split deflate and inflate states for DFLTCC	2023-02-02 22:50:09 -08:00
zstd	zstd: Fix array-index-out-of-bounds UBSAN warning	2023-11-14 17:12:52 -08:00
.gitignore	…
Kconfig	PCI: Move pci_iomap.c to drivers/pci/	2024-02-12 10:35:40 -06:00
Kconfig.debug	watchdog/softlockup: Low-overhead detection of interrupt storm	2024-04-12 17:08:05 +02:00
Kconfig.kasan	treewide: update LLVM Bugzilla links	2024-02-22 15:38:51 -08:00
Kconfig.kcsan	Kernel concurrency sanitizer (KCSAN) updates for v6.3	2023-02-25 13:02:20 -08:00
Kconfig.kfence	mm/slab: remove CONFIG_SLAB from all Kconfig and Makefile	2023-12-05 11:14:40 +01:00
Kconfig.kgdb	vt: remove superfluous CONFIG_HW_CONSOLE	2024-01-27 19:03:51 -08:00
Kconfig.kmsan	mm/slab: remove CONFIG_SLAB from all Kconfig and Makefile	2023-12-05 11:14:40 +01:00
Kconfig.ubsan	ubsan: Disable signed integer overflow sanitizer on GCC < 8	2024-03-18 11:24:14 -07:00
Makefile	pci-v6.9-changes	2024-03-14 10:58:27 -07:00
argv_split.c	argv_split: fix kernel-doc warnings	2023-09-19 13:21:33 -07:00
ashldi3.c	…
ashrdi3.c	…
asn1_decoder.c	…
asn1_encoder.c	…
assoc_array.c	assoc_array: fix the return value in assoc_array_insert_mid_shortcut()	2024-03-12 13:09:23 -07:00
atomic64.c	…
atomic64_test.c	…
audit.c	…
base64.c	…
bcd.c	…
bch.c	lib/bch.c: use bitrev instead of internal logic	2023-08-18 10:18:58 -07:00
bitfield_kunit.c	…
bitmap-str.c	lib/bitmap: split-out string-related operations to a separate files	2023-10-14 20:25:22 -07:00
bitmap.c	cpumask: add cpumask_weight_andnot()	2024-02-01 13:06:40 +01:00
bitrev.c	…
bootconfig-data.S	…
bootconfig.c	…
bsearch.c	…
btree.c	btree: remove MODULE_LICENSE in non-modules	2023-04-13 13:13:54 -07:00
bucket_locks.c	…
bug.c	cpuidle: lib/bug: Disable rcu_is_watching() during WARN/BUG	2023-01-31 15:01:45 +01:00
build_OID_registry	…
buildid.c	- Kuan-Wei Chiu has developed the well-named series "lib min_heap: Min	2024-03-14 18:03:09 -07:00
bust_spinlocks.c	…
check_signature.c	…
checksum.c	…
checksum_kunit.c	kunit: Fix again checksum tests on big endian CPUs	2024-02-29 09:16:02 -08:00
closure.c	closures: CLOSURE_CALLBACK() to fix type punning	2023-11-24 00:29:58 -05:00
clz_ctz.c	lib/clz_ctz.c: Fix __clzdi2() and __ctzdi2() for 32-bit kernels	2023-08-25 13:22:10 -07:00
clz_tab.c	…
cmdline.c	…
cmdline_kunit.c	lib/cmdline: Fix an invalid format specifier in an assertion msg	2024-02-27 15:25:56 -07:00
cmpdi2.c	…
compat_audit.c	…
cpu_rmap.c	lib: cpu_rmap: Fix potential use-after-free in irq_cpu_rmap_release()	2023-06-07 21:25:00 -07:00
cpumask.c	bitmap patches for v6.7	2023-11-03 07:08:36 -10:00
cpumask_kunit.c	cpumask: re-introduce constant-sized cpumask optimizations	2023-03-05 14:30:34 -08:00
crc-ccitt.c	lib: crc_ccitt_false() is identical to crc_itu_t()	2023-12-29 12:22:26 -08:00
crc-itu-t.c	…
crc-t10dif.c	…
crc4.c	…
crc7.c	…
crc8.c	…
crc16.c	…
crc32.c	…
crc32defs.h	…
crc32test.c	…
crc64-rocksoft.c	…
crc64.c	…
ctype.c	…
debug_info.c	…
debug_locks.c	…
debugobjects.c	debugobjects: Stop accessing objects after releasing hash bucket lock	2023-11-22 10:41:46 +01:00
dec_and_lock.c	perf: Fix perf_event_pmu_context serialization	2023-01-31 20:37:18 +01:00
decompress.c	…
decompress_bunzip2.c	…
decompress_inflate.c	decompressor: provide missing prototypes	2023-06-09 17:44:17 -07:00
decompress_unlz4.c	…
decompress_unlzma.c	…
decompress_unlzo.c	…
decompress_unxz.c	arch: Remove Itanium (IA-64) architecture	2023-09-11 08:13:17 +00:00
decompress_unzstd.c	decompressor: provide missing prototypes	2023-06-09 17:44:17 -07:00
devmem_is_allowed.c	lib: devmem_is_allowed: include linux/io.h	2023-06-09 17:44:15 -07:00
devres.c	PCI: Move PCI-specific devres code to drivers/pci/	2024-02-12 10:36:17 -06:00
dhry.h	lib: add Dhrystone benchmark test	2023-02-02 22:50:01 -08:00
dhry_1.c	lib: dhry: use ktime_ms_delta() helper	2024-02-22 15:38:52 -08:00
dhry_2.c	lib: add Dhrystone benchmark test	2023-02-02 22:50:01 -08:00
dhry_run.c	lib: dhry: remove unneeded <linux/mutex.h>	2024-02-22 15:38:52 -08:00
digsig.c	…
dump_stack.c	dump_stack: Do not get cpu_sync for panic CPU	2024-02-07 17:23:19 +01:00
dynamic_debug.c	dyndbg: replace kstrdup() + strchr() with kstrdup_and_replace()	2024-03-06 13:07:39 -08:00
dynamic_queue_limits.c	net: dqs: add NIC stall detector based on BQL	2024-03-08 10:23:26 +00:00
earlycpio.c	…
errname.c	parisc: Drop the HP-UX ENOSYM and EREMOTERELEASE error codes	2023-11-25 09:43:18 +01:00
error-inject.c	lib: error-inject: remove error checking for debugfs_create_dir()	2023-08-18 10:18:55 -07:00
errseq.c	…
extable.c	…
fault-inject-usercopy.c	…
fault-inject.c	fault-inject: allow configuration via configfs	2023-04-13 07:38:54 -06:00
fdt.c	…
fdt_addresses.c	…
fdt_empty_tree.c	…
fdt_ro.c	…
fdt_rw.c	…
fdt_strerror.c	…
fdt_sw.c	…
fdt_wip.c	…
find_bit.c	cpumask: introduce for_each_cpu_or	2023-03-19 10:02:04 -07:00
find_bit_benchmark.c	treewide: use get_random_u32_below() instead of deprecated function	2022-11-18 02:15:15 +01:00
flex_proportions.c	flex_proportions: remove unused fprop_local_single	2024-02-22 15:38:52 -08:00
fortify_kunit.c	fortify: Improve buffer overflow reporting	2024-02-29 13:38:02 -08:00
fw_table.c	lib/firmware_table: Provide buffer length argument to cdat_table_parse()	2024-03-13 00:03:21 -07:00
gen_crc32table.c	…
gen_crc64table.c	…
genalloc.c	Devicetree include cleanups for v6.6:	2023-08-30 17:04:28 -07:00
generic-radix-tree.c	lib/generic-radix-tree.c: Make nodes more reasonably sized	2024-03-13 21:22:26 -04:00
glob.c	…
globtest.c	…
group_cpus.c	lib/group_cpus.c: avoid acquiring cpu hotplug lock in group_cpus_evenly	2023-12-06 16:12:46 -08:00
hashtable_test.c	lib/hashtable_test.c: add test for the hashtable structure	2023-02-08 14:28:17 -07:00
hexdump.c	…
hweight.c	…
idr.c	ida: Fix crash in ida_free when the bitmap is empty	2023-12-21 10:02:28 -08:00
inflate.c	…
interval_tree.c	interval-tree: Add a utility to iterate over spans in an interval tree	2022-11-29 16:34:15 -04:00
interval_tree_test.c	…
iomap.c	…
iomap_copy.c	…
iommu-helper.c	…
iov_iter.c	vfs-6.9.misc	2024-03-11 09:38:17 -07:00
irq_poll.c	…
irq_regs.c	…
is_signed_type_kunit.c	lib: assume char is unsigned	2022-11-19 00:56:15 +01:00
is_single_threaded.c	…
kasprintf.c	…
kfifo.c	…
klist.c	…
kobject.c	Revert "kobject: Remove redundant checks for whether ktype is NULL"	2024-02-08 16:39:25 +00:00
kobject_uevent.c	kobject: reduce uevent_sock_mutex scope	2024-02-17 16:20:41 +01:00
kstrtox.c	kstrtox: consistently use _tolower()	2023-08-21 13:46:25 -07:00
kstrtox.h	…
kunit_iov_iter.c	iov_iter: Kunit tests for page extraction	2023-09-09 15:11:49 -07:00
libcrc32c.c	libcrc32c: remove crc32c_impl	2023-04-17 18:01:23 +02:00
linear_ranges.c	…
list-test.c	list: test: Test the klist structure	2023-03-31 09:21:35 -06:00
list_debug.c	list: Introduce CONFIG_LIST_HARDENED	2023-08-15 14:57:25 -07:00
list_sort.c	…
llist.c	llist: add llist_del_first_this()	2023-10-16 12:44:06 -04:00
locking-selftest-hardirq.h	…
locking-selftest-mutex.h	…
locking-selftest-rlock-hardirq.h	…
locking-selftest-rlock-softirq.h	…
locking-selftest-rlock.h	…
locking-selftest-rsem.h	…
locking-selftest-rtmutex.h	…
locking-selftest-softirq.h	…
locking-selftest-spin-hardirq.h	…
locking-selftest-spin-softirq.h	…
locking-selftest-spin.h	…
locking-selftest-wlock-hardirq.h	…
locking-selftest-wlock-softirq.h	…
locking-selftest-wlock.h	…
locking-selftest-wsem.h	…
locking-selftest.c	lockdep/selftests: Use SBRM APIs for wait context tests	2023-07-26 12:29:13 +02:00
lockref.c	lockref: stop doing cpu_relax in the cmpxchg loop	2023-01-13 14:35:38 -06:00
logic_iomem.c	…
logic_pio.c	minmax: add in_range() macro	2023-08-24 16:20:18 -07:00
lru_cache.c	lru_cache: remove unused lc_private, lc_set, lc_index_of	2022-11-22 19:38:39 -07:00
lshrdi3.c	…
lwq.c	lib: add light-weight queuing mechanism.	2023-10-16 12:44:06 -04:00
maple_tree.c	- Sumanth Korikkar has taught s390 to allocate hotplug-time page frames	2024-03-14 17:43:30 -07:00
memcat_p.c	…
memcpy_kunit.c	Revert "kunit: memcpy: Split slow memcpy tests into MEMCPY_SLOW_KUNIT_TEST"	2024-03-18 11:24:15 -07:00
memory-notifier-error-inject.c	…
memregion.c	…
memweight.c	…
muldi3.c	…
net_utils.c	mac_pton: Clean up the header inclusions	2023-06-06 13:18:32 +02:00
netdev-notifier-error-inject.c	…
nlattr.c	netlink: add nla be16/32 types to minlen array	2024-02-22 19:01:55 -08:00
nmi_backtrace.c	nmi_backtrace: allow excluding an arbitrary CPU	2023-08-18 10:19:00 -07:00
notifier-error-inject.c	lib: remove error checking for debugfs_create_dir()	2023-08-18 10:18:55 -07:00
notifier-error-inject.h	…
objagg.c	…
objpool.c	lib: objpool: fix head overrun on RK3588 SBC	2023-12-01 14:53:55 +09:00
of-reconfig-notifier-error-inject.c	…
oid_registry.c	lib/oid_registry.c: remove redundant assignment to variable num	2022-11-18 13:55:06 -08:00
once.c	…
overflow_kunit.c	overflow: Change DEFINE_FLEX to take __counted_by member	2024-03-22 16:25:31 -07:00
packing.c	lib: packing: remove MODULE_LICENSE in non-modules	2023-03-09 23:08:04 -08:00
parman.c	…
parser.c	lib: parser: update documentation for match_NUMBER functions	2023-03-02 21:54:22 -08:00
percpu-refcount.c	percpu-refcount: Use call_rcu_hurry() for atomic switch	2022-11-30 13:16:40 -08:00
percpu_counter.c	percpu_counter: extend _limited_add() to negative amounts	2023-10-18 14:34:14 -07:00
percpu_test.c	…
plist.c	…
pm-notifier-error-inject.c	…
polynomial.c	…
radix-tree.c	radix tree: remove unused variable	2023-08-21 13:07:22 -07:00
radix-tree.h	radix-tree: move declarations to header	2023-06-12 11:31:50 -07:00
random32.c	treewide: use get_random_bytes() when possible	2022-10-11 17:42:58 -06:00
ratelimit.c	…
rbtree.c	lib/rbtree: use '+' instead of '|' for setting color.	2023-04-18 16:39:33 -07:00
rbtree_test.c	…
rcuref.c	locking/atomics: Use atomic_try_cmpxchg_release() to micro-optimize rcuref_put_slowpath()	2023-10-10 10:14:27 +02:00
ref_tracker.c	lib/ref_tracker: remove warnings in case of allocation failure	2023-06-05 15:28:42 -07:00
refcount.c	…
rhashtable.c	rhashtable: Allow rhashtable to be used from irq-safe contexts	2022-12-09 10:42:56 +00:00
sbitmap.c	sbitmap: remove stale comment in sbq_calc_wake_batch	2024-01-15 07:23:50 -07:00
scatterlist.c	scatterlist: add missing function params to kernel-doc	2023-09-19 13:21:33 -07:00
seq_buf.c	seq_buf: Fix kernel documentation	2024-02-15 12:17:28 -05:00
sg_pool.c	…
sg_split.c	…
siphash.c	…
siphash_kunit.c	siphash: Convert selftest to KUnit	2022-11-01 10:04:52 -07:00
slub_kunit.c	linux-kselftest-kunit-next-6.2-rc1	2022-12-12 16:42:57 -08:00
smp_processor_id.c	…
sort.c	lib/sort: optimize heapsort with double-pop variation	2024-02-22 15:38:52 -08:00
stackdepot.c	lib/stackdepot: off by one in depot_fetch_stack()	2024-03-04 17:01:17 -08:00
stackinit_kunit.c	- Kuan-Wei Chiu has developed the well-named series "lib min_heap: Min	2024-03-14 18:03:09 -07:00
stmp_device.c	…
strcat_kunit.c	string: Add Kunit tests for strcat() family	2023-05-16 14:08:02 -07:00
string.c	string: Allow 2-argument strscpy()	2024-02-20 20:47:32 -08:00
string_helpers.c	lib/string_helpers: Add flags param to string_get_size()	2024-02-29 22:34:42 -08:00
string_helpers_kunit.c	string: Convert helpers selftest to KUnit	2024-03-05 01:55:28 -08:00
string_kunit.c	string: Convert selftest to KUnit	2024-03-05 01:55:28 -08:00
strncpy_from_user.c	…
strnlen_user.c	…
strscpy_kunit.c	fortify: Short-circuit known-safe calls to strscpy()	2022-11-01 10:04:52 -07:00
syscall.c	…
test-kstrtox.c	…
test_bitmap.c	lib/bitmap: Introduce bitmap_scatter() and bitmap_gather() helpers	2024-03-11 09:36:11 +00:00
test_bitops.c	…
test_bits.c	…
test_blackhole_dev.c	net: blackhole_dev: fix build warning for ethh set but not used	2024-02-05 12:30:54 +00:00
test_bpf.c	test_bpf: Rename second ALU64_SMOD_X to ALU64_SMOD_K	2023-12-09 21:27:54 -08:00
test_debug_virtual.c	…
test_dynamic_debug.c	…
test_firmware.c	firmware_loader: Expand Firmware upload error codes with firmware invalid error	2023-11-24 18:09:19 -08:00
test_fprobe.c	fprobe: Pass return address to the handlers	2023-06-06 21:39:55 +09:00
test_fpu.c	…
test_free_pages.c	…
test_hash.c	…
test_hexdump.c	treewide: use get_random_u32_inclusive() when possible	2022-11-18 02:18:02 +01:00
test_hmm.c	lib: replace kmap() with kmap_local_page()	2023-08-18 10:18:50 -07:00
test_hmm_uapi.h	hmm-tests: add test for migrate_device_range()	2022-10-12 18:51:50 -07:00
test_ida.c	Quite a lot of kexec work this time around. Many singleton patches in	2024-01-09 11:46:20 -08:00
test_kmod.c	lib/test_kmod: fix kernel-doc warnings	2024-02-02 10:21:26 -08:00
test_kprobes.c	test_kprobes: Add recursed kprobe test case	2023-02-21 08:52:42 +09:00
test_linear_ranges.c	lib/test_linear_ranges: Use LINEAR_RANGE()	2022-11-16 13:32:32 +00:00
test_list_sort.c	treewide: use get_random_u32_below() instead of deprecated function	2022-11-18 02:15:15 +01:00
test_lockup.c	…
test_maple_tree.c	test_maple_tree: testing the cyclic allocation	2024-02-21 09:34:26 +01:00
test_memcat_p.c	…
test_meminit.c	mm, treewide: introduce NR_PAGE_ORDERS	2024-01-08 15:27:15 -08:00
test_min_heap.c	treewide: use get_random_u32() when possible	2022-10-11 17:42:58 -06:00
test_module.c	…
test_objagg.c	treewide: use get_random_bytes() when possible	2022-10-11 17:42:58 -06:00
test_objpool.c	lib: test_objpool: make global variables static	2023-11-10 19:59:04 +09:00
test_parman.c	…
test_printf.c	lib/vsprintf: declare no_hash_pointers in sprintf.h	2023-08-21 13:46:24 -07:00
test_ref_tracker.c	lib/ref_tracker: improve printing stats	2023-06-05 15:28:42 -07:00
test_rhashtable.c	Kill sched.h dependency on rcupdate.h	2023-12-27 11:50:20 -05:00
test_scanf.c	lib: test_scanf: Add explicit type cast to result initialization in test_number_prefix()	2023-08-16 11:47:29 +02:00
test_sort.c	…
test_static_key_base.c	…
test_static_keys.c	…
test_sysctl.c	sysctl: Remove the now superfluous sentinel elements from ctl_table array	2023-12-28 04:57:57 -08:00
test_ubsan.c	ubsan: Reintroduce signed overflow sanitizer	2024-02-20 20:44:49 -08:00
test_user_copy.c	…
test_uuid.c	…
test_vmalloc.c	lib/test_vmalloc.c: use unsigned long constant	2024-03-04 17:01:22 -08:00
test_xarray.c	XArray: add cmpxchg order test	2024-02-22 10:24:48 -08:00
textsearch.c	…
timerqueue.c	…
trace_readwrite.c	lib/trace_readwrite.c:: replace asm-generic/io with linux/io	2023-12-29 12:22:29 -08:00
ts_bm.c	lib/ts_bm: add helper to reduce indentation and improve readability	2023-07-27 13:45:51 +02:00
ts_fsm.c	…
ts_kmp.c	…
ubsan.c	ubsan: Reintroduce signed overflow sanitizer	2024-02-20 20:44:49 -08:00
ubsan.h	ubsan: Reintroduce signed overflow sanitizer	2024-02-20 20:44:49 -08:00
ucmpdi2.c	…
ucs2_string.c	lib/ucs2_string: Add UCS-2 strscpy function	2023-09-13 10:18:42 -07:00
usercopy.c	uaccess: Add speculation barrier to copy_from_user()	2023-02-21 14:45:22 -08:00
uuid.c	treewide: use get_random_bytes() when possible	2022-10-11 17:42:58 -06:00
vsprintf.c	lib/vsprintf: Fix %pfwf when current node refcount == 0	2023-12-06 11:06:59 +01:00
win_minmax.c	lib/win_minmax: use /* notation for regular comments	2023-01-11 16:14:21 -08:00
xarray.c	xarray: Document necessary flag in alloc functions	2023-09-05 19:01:38 -04:00
xxhash.c	…