Wang Qing 89e28ce60c workqueue/watchdog: Make unbound workqueues aware of touch_softlockup_watchdog() ... 84;0;0c84;0;0c There are two workqueue-specific watchdog timestamps: + @wq_watchdog_touched_cpu (per-CPU) updated by touch_softlockup_watchdog() + @wq_watchdog_touched (global) updated by touch_all_softlockup_watchdogs() watchdog_timer_fn() checks only the global @wq_watchdog_touched for unbound workqueues. As a result, unbound workqueues are not aware of touch_softlockup_watchdog(). The watchdog might report a stall even when the unbound workqueues are blocked by a known slow code. Solution: touch_softlockup_watchdog() must touch also the global @wq_watchdog_touched timestamp. The global timestamp can no longer be used for bound workqueues because it is now updated from all CPUs. Instead, bound workqueues have to check only @wq_watchdog_touched_cpu and these timestamps have to be updated for all CPUs in touch_all_softlockup_watchdogs(). Beware: The change might cause the opposite problem. An unbound workqueue might get blocked on CPU A because of a real softlockup. The workqueue watchdog would miss it when the timestamp got touched on CPU B. It is acceptable because softlockups are detected by softlockup watchdog. The workqueue watchdog is there to detect stalls where a work never finishes, for example, because of dependencies of works queued into the same workqueue. V3: - Modify the commit message clearly according to Petr's suggestion. Signed-off-by: Wang Qing <wangqing@vivo.com> Signed-off-by: Tejun Heo <tj@kernel.org>		2021-04-04 13:26:49 -04:00
..
bpf	bpf: Fix umd memory leak in copy_process()	2021-03-19 22:23:19 +01:00
cgroup	idmapped-mounts-v5.12	2021-02-23 13:39:45 -08:00
configs	staging: ION: remove some references to CONFIG_ION	2021-01-06 17:39:38 +01:00
debug	kgdb: fix to kill breakpoints on initmem after boot	2021-02-26 09:41:05 -08:00
dma	Merge branch 'stable/for-linus-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb	2021-02-26 13:59:32 -08:00
entry	entry: Explicitly flush pending rcuog wakeup before last rescheduling point	2021-02-17 14:12:43 +01:00
events	perf/core: Flush PMU internal buffers for per-CPU events	2021-03-06 12:52:39 +01:00
gcov	gcov: fix clang-11+ support	2021-03-25 09:22:55 -07:00
irq	genirq: Disable interrupts for force threaded handlers	2021-03-21 00:17:52 +01:00
kcsan	kcsan: Rewrite kcsan_prandom_u32_max() without prandom_u32_state()	2021-01-04 14:39:07 -08:00
livepatch	kallsyms: refactor {,module_}kallsyms_on_each_symbol	2021-02-08 12:22:08 +01:00
locking	locking/ww_mutex: Simplify use_ww_ctx & ww_ctx handling	2021-03-17 09:56:44 +01:00
power	PM: EM: postpone creating the debugfs dir till fs_initcall	2021-03-23 19:53:48 +01:00
printk	Merge branch 'printk-rework' into for-linus	2021-02-22 13:43:55 +01:00
rcu	Scheduler updates for v5.12:	2021-02-21 12:35:04 -08:00
sched	sched/membarrier: fix missing local execution of ipi_sync_rq_state()	2021-03-06 12:40:21 +01:00
time	kernel, fs: Introduce and use set_restart_fn() and arch_set_restart_data()	2021-03-16 22:13:10 +01:00
trace	Fix stack trace entry size to stop showing garbage	2021-04-02 08:39:00 -07:00
.gitignore
acct.c	kernel/acct.c: use #elif instead of #end and #elif	2020-12-15 22:46:15 -08:00
async.c	treewide: Remove uninitialized_var() usage	2020-07-16 12:35:15 -07:00
audit_fsnotify.c	audit_alloc_mark(): don't open-code ERR_CAST()	2021-02-23 10:25:27 -05:00
audit_tree.c	fsnotify: generalize handle_inode_event()	2020-12-03 14:58:35 +01:00
audit_watch.c	fsnotify: generalize handle_inode_event()	2020-12-03 14:58:35 +01:00
audit.c	audit: Remove leftover reference to the audit_tasklet	2021-01-15 11:58:10 -05:00
audit.h	audit: change unnecessary globals into statics	2020-08-17 20:26:58 -04:00
auditfilter.c	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
auditsc.c	idmapped-mounts-v5.12	2021-02-23 13:39:45 -08:00
backtracetest.c	treewide: Replace DECLARE_TASKLET() with DECLARE_TASKLET_OLD()	2020-07-30 11:15:58 -07:00
bounds.c
capability.c	capability: handle idmapped mounts	2021-01-24 14:27:16 +01:00
compat.c	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
configs.c
context_tracking.c
cpu_pm.c	notifier: Fix broken error handling pattern	2020-09-01 09:58:03 +02:00
cpu.c	cpu/hotplug: Add lockdep_is_cpus_held()	2021-01-06 16:24:59 -08:00
crash_core.c	kdump: append uts_namespace.name offset to VMCOREINFO	2020-12-15 22:46:18 -08:00
crash_dump.c
cred.c
delayacct.c
dma.c
exec_domain.c
exit.c	kernel/io_uring: cancel io_uring before task works	2020-12-30 19:36:54 -07:00
extable.c
fail_function.c	fault-injection: handle EI_ETYPE_TRUE	2020-12-15 22:46:19 -08:00
fork.c	io_uring-5.12-2021-03-27	2021-03-28 11:42:05 -07:00
freezer.c	Revert "kernel: freezer should treat PF_IO_WORKER like PF_KTHREAD for freezing"	2021-03-27 14:09:10 -06:00
futex.c	kernel, fs: Introduce and use set_restart_fn() and arch_set_restart_data()	2021-03-16 22:13:10 +01:00
gen_kheaders.sh
groups.c	groups: simplify struct group_info allocation	2021-02-26 09:41:03 -08:00
hung_task.c	kernel/hung_task.c: make type annotations consistent	2020-11-02 12:14:19 -08:00
iomem.c
irq_work.c	irq_work: Optimize irq_work_single()	2020-11-24 16:47:49 +01:00
jump_label.c	static_call: Fix static_call_update() sanity check	2021-03-19 13:16:44 +01:00
kallsyms.c	kallsyms: only build {,module_}kallsyms_on_each_symbol when required	2021-02-08 12:24:04 +01:00
kcmp.c	Merge branch 'exec-update-lock-for-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2020-12-15 19:36:48 -08:00
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt	preempt: Introduce CONFIG_PREEMPT_DYNAMIC	2021-02-17 14:12:24 +01:00
kcov.c	kernel: make kcov_common_handle consider the current context	2020-11-02 18:00:20 -08:00
kexec_core.c	Merge branch 'work.elf-compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2021-02-21 09:29:23 -08:00
kexec_elf.c
kexec_file.c	ima: Free IMA measurement buffer after kexec syscall	2021-02-10 15:49:38 -05:00
kexec_internal.h	kexec: move machine_kexec_post_load() to public interface	2021-02-22 12:33:26 +00:00
kexec.c	LSM: Introduce kernel_post_load_data() hook	2020-10-05 13:37:03 +02:00
kheaders.c
kmod.c	kmod: remove redundant "be an" in the comment	2020-08-12 10:58:01 -07:00
kprobes.c	kprobes: Fix to delay the kprobes jump optimization	2021-02-19 14:57:12 -05:00
ksysfs.c
kthread.c	- Correct the marking of kthreads which are supposed to run on a specific,	2021-01-24 10:09:20 -08:00
latencytop.c
Makefile	kcmp: Support selection of SYS_kcmp without CHECKPOINT_RESTORE	2021-02-16 09:59:41 +01:00
module_signature.c	module: harden ELF info handling	2021-01-19 10:24:45 +01:00
module_signing.c	module: harden ELF info handling	2021-01-19 10:24:45 +01:00
module-internal.h
module.c	module: potential uninitialized return in module_kallsyms_on_each_symbol()	2021-02-10 16:57:04 +01:00
notifier.c	notifier: Fix broken error handling pattern	2020-09-01 09:58:03 +02:00
nsproxy.c	fixes-v5.11	2020-12-14 16:40:27 -08:00
padata.c	padata: fix possible padata_works_lock deadlock	2020-09-04 17:51:55 +10:00
panic.c	panic: don't dump stack twice on warn	2020-11-14 11:26:04 -08:00
params.c	Modules updates for v5.11	2020-12-17 13:01:31 -08:00
pid_namespace.c	fixes-v5.11	2020-12-14 16:40:27 -08:00
pid.c	Merge branch 'exec-update-lock-for-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2020-12-15 19:36:48 -08:00
profile.c
ptrace.c	Revert "kernel: treat PF_IO_WORKER like PF_KTHREAD for ptrace/signals"	2021-03-27 14:09:10 -06:00
range.c	kernel.h: split out min()/max() et al. helpers	2020-10-16 11:11:19 -07:00
reboot.c	Revert "PM: ACPI: reboot: Use S5 for reboot"	2021-03-18 16:58:02 +01:00
regset.c	regset: kill ->get()	2020-07-27 14:31:12 -04:00
relay.c	relay: allow the use of const callback structs	2020-12-15 22:46:18 -08:00
resource_kunit.c	resource: provide meaningful MODULE_LICENSE() in test suite	2020-11-25 18:52:35 +01:00
resource.c	resource: Move devmem revoke code to resource framework	2021-01-12 14:26:31 +01:00
rseq.c
scftorture.c	scftorture: Add debug output for wrong-CPU warning	2021-01-04 13:53:41 -08:00
scs.c	scs: switch to vmapped shadow stacks	2020-12-01 10:30:28 +00:00
seccomp.c	seccomp: Improve performace by optimizing rmb()	2021-02-10 12:40:11 -08:00
signal.c	Revert "signal: don't allow STOP on PF_IO_WORKER threads"	2021-03-27 14:09:11 -06:00
smp.c	smp: Process pending softirqs in flush_smp_call_function_from_idle()	2021-02-17 14:12:42 +01:00
smpboot.c	kthread: Extract KTHREAD_IS_PER_CPU	2021-01-22 15:09:42 +01:00
smpboot.h
softirq.c	softirq: Move do_softirq_own_stack() to generic asm header	2021-02-10 23:34:16 +01:00
stackleak.c	stackleak: let stack_erasing_sysctl take a kernel pointer buffer	2020-09-19 13:13:39 -07:00
stacktrace.c	stacktrace: Remove reliable argument from arch_stack_walk() callback	2020-09-18 14:24:16 +01:00
static_call.c	static_call: Fix static_call_update() sanity check	2021-03-19 13:16:44 +01:00
stop_machine.c	Merge branch 'linus' into sched/core, to resolve semantic conflict	2020-11-27 11:10:50 +01:00
sys_ni.c	epoll: wire up syscall epoll_pwait2	2020-12-19 11:18:38 -08:00
sys.c	prctl: fix PR_SET_MM_AUXV kernel stack leak	2021-03-14 14:33:27 -07:00
sysctl-test.c
sysctl.c	sysctl.c: fix underflow value setting risk in vm_table	2021-02-26 09:41:03 -08:00
task_work.c	task_work: remove legacy TWA_SIGNAL path	2020-12-12 09:17:38 -07:00
taskstats.c	treewide: rename nla_strlcpy to nla_strscpy.	2020-11-16 08:08:54 -08:00
test_kprobes.c
torture.c	torture: Maintain torture-specific set of CPUs-online books	2021-01-06 17:17:22 -08:00
tracepoint.c	tracepoints: Code clean up	2021-02-09 12:27:29 -05:00
tsacct.c
ucount.c
uid16.c
uid16.h
umh.c	usermodehelper: reset umask to default before executing user process	2020-10-06 10:31:52 -07:00
up.c
user_namespace.c	fixes-v5.11	2020-12-14 16:40:27 -08:00
user-return-notifier.c
user.c	user: Use generic ns_common::count	2020-08-19 14:14:12 +02:00
usermode_driver.c	bpf: Fix umd memory leak in copy_process()	2021-03-19 22:23:19 +01:00
utsname_sysctl.c
utsname.c	uts: Use generic ns_common::count	2020-08-19 14:13:20 +02:00
watch_queue.c	watch_queue: rectify kernel-doc for init_watch()	2021-01-26 11:16:34 +00:00
watchdog_hld.c
watchdog.c	workqueue/watchdog: Make unbound workqueues aware of touch_softlockup_watchdog()	2021-04-04 13:26:49 -04:00
workqueue_internal.h
workqueue.c	workqueue/watchdog: Make unbound workqueues aware of touch_softlockup_watchdog()	2021-04-04 13:26:49 -04:00