Breno Leitao e8e14ac7cf workqueue: Show in-flight work item duration in stall diagnostics ...

When diagnosing workqueue stalls, knowing how long each in-flight work
item has been executing is valuable. Add a current_start timestamp
(jiffies) to struct worker, set it when a work item begins execution in
process_one_work(), and print the elapsed wall-clock time in show_pwq().

Unlike current_at (which tracks CPU runtime and resets on wakeup for
CPU-intensive detection), current_start is never reset because the
diagnostic cares about total wall-clock time including sleeps.

Before: in-flight: 165:stall_work_fn [wq_stall]
After:  in-flight: 165:stall_work_fn [wq_stall] for 100s

Signed-off-by: Breno Leitao <leitao@debian.org>
Acked-by: Song Liu <song@kernel.org>
Signed-off-by: Tejun Heo <tj@kernel.org>

2026-03-05 07:27:48 -10:00

..

bpf

bpf: Improve bounds when tnum has a single possible value

2026-02-27 16:11:50 -08:00

cgroup

Merge tag 'cgroup-for-7.0-rc2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

2026-03-03 14:25:18 -08:00

configs

Remove WARN_ALL_UNSEEDED_RANDOM kernel config option

2026-02-23 11:18:48 -08:00

debug

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21 01:02:28 -08:00

dma

dma-mapping: avoid random addr value print out on error path

2026-02-23 08:26:54 +01:00

entry

Merge branch 'core/entry' into sched/core

2026-01-30 15:40:05 +01:00

events

perf: Fix __perf_event_overflow() vs perf_remove_from_context() race

2026-02-25 15:02:34 +01:00

futex

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

gcov

Convert more 'alloc_obj' cases to default GFP_KERNEL arguments

2026-02-21 20:03:00 -08:00

irq

Convert 'alloc_flex' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

kcsan

kcsan: test: Adjust "expect" allocation type for kmalloc_obj

2026-02-26 09:54:08 -08:00

livepatch

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

liveupdate

liveupdate: luo_file: remember retrieve() status

2026-02-24 11:13:26 -08:00

locking

Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses

2026-02-22 08:26:33 -08:00

module

module: Fix kernel panic when a symbol st_shndx is out of bounds

2026-02-23 19:37:28 +00:00

power

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

printk

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

rcu

Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses

2026-02-22 08:26:33 -08:00

sched

Merge tag 'cgroup-for-7.0-rc2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

2026-03-03 14:25:18 -08:00

time

Merge tag 'sysctl-7.00-fixes-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/sysctl/sysctl

2026-03-04 08:21:11 -08:00

trace

bpf: Fix kprobe_multi cookies access in show_fdinfo callback

2026-02-26 11:23:57 -08:00

unwind

Convert more 'alloc_obj' cases to default GFP_KERNEL arguments

2026-02-21 20:03:00 -08:00

.gitignore

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acct.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

async.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

audit_fsnotify.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

audit_tree.c

Convert 'alloc_flex' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

audit_watch.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

audit.c

Convert 'alloc_flex' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

audit.h

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auditfilter.c

Convert 'alloc_flex' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

auditsc.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

backtracetest.c

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bounds.c

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capability.c

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cfi.c

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compat.c

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configs.c

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context_tracking.c

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cpu_pm.c

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cpu.c

Merge tag 'spdx-7.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/spdx

2026-02-17 09:46:03 -08:00

crash_core_test.c

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crash_core.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

crash_dump_dm_crypt.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

crash_reserve.c

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cred.c

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delayacct.c

delayacct: fix uapi timespec64 definition

2026-02-08 00:13:32 -08:00

dma.c

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elfcorehdr.c

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exec_domain.c

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exit.c

kthread: consolidate kthread exit paths to prevent use-after-free

2026-02-26 10:45:49 +01:00

exit.h

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extable.c

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fail_function.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

fork.c

unshare: fix unshare_fs() handling

2026-02-18 14:04:51 +01:00

freezer.c

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gen_kheaders.sh

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groups.c

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21 01:02:28 -08:00

hung_task.c

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iomem.c

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irq_work.c

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jump_label.c

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kallsyms_internal.h

kallsyms: Get rid of kallsyms relative base

2026-01-22 15:58:22 -07:00

kallsyms_selftest.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

kallsyms_selftest.h

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kallsyms.c

Merge tag 'mm-nonmm-stable-2026-02-12-10-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2026-02-12 12:13:01 -08:00

kcmp.c

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Kconfig.freezer

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Kconfig.hz

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Kconfig.kexec

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Kconfig.locks

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Kconfig.preempt

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kcov.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

kexec_core.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

kexec_elf.c

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kexec_file.c

kexec: derive purgatory entry from symbol

2026-01-31 16:16:07 -08:00

kexec_internal.h

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kexec.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

kheaders.c

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kprobes.c

Convert 'alloc_flex' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

kstack_erase.c

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ksyms_common.c

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ksysfs.c

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kthread.c

kthread: consolidate kthread exit paths to prevent use-after-free

2026-02-26 10:45:49 +01:00

latencytop.c

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Makefile

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module_signature.c

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notifier.c

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nscommon.c

nsfs: tighten permission checks for ns iteration ioctls

2026-02-27 22:00:08 +01:00

nsproxy.c

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nstree.c

nstree: tighten permission checks for listing

2026-02-27 22:00:11 +01:00

padata.c

Convert more 'alloc_obj' cases to default GFP_KERNEL arguments

2026-02-21 20:03:00 -08:00

panic.c

panic: add panic_force_cpu= parameter to redirect panic to a specific CPU

2026-02-03 08:21:26 -08:00

params.c

Convert more 'alloc_obj' cases to default GFP_KERNEL arguments

2026-02-21 20:03:00 -08:00

pid_namespace.c

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pid_sysctl.h

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pid.c

Revert "pid: make __task_pid_nr_ns(ns => NULL) safe for zombie callers"

2026-02-10 11:39:30 +01:00

profile.c

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ptrace.c

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range.c

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reboot.c

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21 01:02:28 -08:00

regset.c

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relay.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

resource_kunit.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

resource.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

rseq.c

rseq: slice ext: Ensure rseq feature size differs from original rseq size

2026-02-23 11:19:19 +01:00

scftorture.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

scs.c

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seccomp.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

signal.c

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smp.c

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smpboot.c

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smpboot.h

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softirq.c

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stacktrace.c

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static_call_inline.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

static_call.c

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stop_machine.c

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sys_ni.c

rseq: Implement sys_rseq_slice_yield()

2026-01-22 11:11:17 +01:00

sys.c

Merge tag 'riscv-for-linus-7.0-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

2026-02-12 19:17:44 -08:00

sysctl-test.c

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sysctl.c

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task_work.c

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taskstats.c

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torture.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

tracepoint.c

Convert 'alloc_flex' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

tsacct.c

tsacct: skip all kernel threads

2026-01-26 19:07:13 -08:00

ucount.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

uid16.c

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uid16.h

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umh.c

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21 01:02:28 -08:00

up.c

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user_namespace.c

Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses

2026-02-22 08:26:33 -08:00

user-return-notifier.c

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user.c

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utsname_sysctl.c

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utsname.c

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vhost_task.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

vmcore_info.c

Merge tag 'mm-nonmm-stable-2026-02-12-10-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2026-02-12 12:13:01 -08:00

watch_queue.c

Convert 'alloc_flex' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

watchdog_buddy.c

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watchdog_perf.c

watchdog/hardlockup: simplify perf event probe and remove per-cpu dependency

2026-02-08 00:13:35 -08:00

watchdog.c

watchdog/softlockup: fix sample ring index wrap in need_counting_irqs()

2026-02-08 00:13:34 -08:00

workqueue_internal.h

workqueue: Show in-flight work item duration in stall diagnostics

2026-03-05 07:27:48 -10:00

workqueue.c

workqueue: Show in-flight work item duration in stall diagnostics

2026-03-05 07:27:48 -10:00