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| author | fuyuanli <fuyuanli@didiglobal.com> | 2023-02-01 21:54:33 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-02-09 17:03:20 -0800 |
| commit | b1f712b308dcdb1af73e5fcf3d8bf8eb44b36600 (patch) | |
| tree | 2e82aa14411e357872d99e4492b6e99705e90714 /kernel | |
| parent | 9f79ffc19302253d0b9fe1f5e0cdf1cb04eae78c (diff) | |
| download | linux-stable-b1f712b308dcdb1af73e5fcf3d8bf8eb44b36600.tar.gz linux-stable-b1f712b308dcdb1af73e5fcf3d8bf8eb44b36600.tar.bz2 linux-stable-b1f712b308dcdb1af73e5fcf3d8bf8eb44b36600.zip | |
hung_task: print message when hung_task_warnings gets down to zero.
It's useful to report it when hung_task_warnings gets down to zero, so
that we can know if kernel log was lost or there is no hung task was
detected.
Link: https://lkml.kernel.org/r/20230201135416.GA6560@didi-ThinkCentre-M920t-N000
Signed-off-by: fuyuanli <fuyuanli@didiglobal.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/hung_task.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/hung_task.c b/kernel/hung_task.c index c71889f3f3fc..322813366c6c 100644 --- a/kernel/hung_task.c +++ b/kernel/hung_task.c @@ -142,6 +142,8 @@ static void check_hung_task(struct task_struct *t, unsigned long timeout) if (sysctl_hung_task_all_cpu_backtrace) hung_task_show_all_bt = true; + if (!sysctl_hung_task_warnings) + pr_info("Future hung task reports are suppressed, see sysctl kernel.hung_task_warnings\n"); } touch_nmi_watchdog(); |