Messages in this thread Patch in this message | | | Date | Wed, 1 Feb 2023 21:54:33 +0800 | From | fuyuanli <> | Subject | [PATCH] hung_task: Print message when hung_task_warnings gets down to zero. |
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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.
Signed-off-by: fuyuanli <fuyuanli@didiglobal.com> --- kernel/hung_task.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/kernel/hung_task.c b/kernel/hung_task.c index bb2354f73ded..ff479c51143d 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(); -- 2.17.1
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