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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>
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@ -142,6 +142,8 @@ static void check_hung_task(struct task_struct *t, unsigned long timeout)
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if (sysctl_hung_task_all_cpu_backtrace)
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hung_task_show_all_bt = true;
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if (!sysctl_hung_task_warnings)
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pr_info("Future hung task reports are suppressed, see sysctl kernel.hung_task_warnings\n");
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}
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touch_nmi_watchdog();
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