diff options
| author | Yongliang Gao <leonylgao@tencent.com> | 2024-06-13 11:31:59 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-06-24 22:25:10 -0700 |
| commit | abd8ac05570cf1488a311f95c4c539fbe119d5da (patch) | |
| tree | 980f5b924159d04cb08d415eab75c1ec2f8073ab /kernel/hung_task.c | |
| parent | d5d6281ae8e0c929c3ff188652f5b12c680fe8bf (diff) | |
hung_task: ignore hung_task_warnings when hung_task_panic is enabled
If hung_task_panic is enabled, don't consider the value of
hung_task_warnings and display the information of the hung tasks.
In some cases, hung_task_panic might not be initially set up, after
several hung tasks occur, the hung_task_warnings count reaches zero. If
hung_task_panic is set up later, it may not display any helpful hung task
info in dmesg, only showing messages like:
Kernel panic - not syncing: hung_task: blocked tasks
CPU: 3 PID: 58 Comm: khungtaskd Not tainted 6.10.0-rc3 #19
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996)
Call Trace:
<TASK>
panic+0x2f3/0x320
watchdog+0x2dd/0x510
? __pfx_watchdog+0x10/0x10
kthread+0xe0/0x110
? __pfx_kthread+0x10/0x10
ret_from_fork+0x2f/0x40
? __pfx_kthread+0x10/0x10
ret_from_fork_asm+0x1a/0x30
</TASK>
Link: https://lkml.kernel.org/r/20240613033159.3446265-1-leonylgao@gmail.com
Signed-off-by: Yongliang Gao <leonylgao@tencent.com>
Reviewed-by: Huang Cun <cunhuang@tencent.com>
Cc: Joel Granados <j.granados@samsung.com>
Cc: John Siddle <jsiddle@redhat.com>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'kernel/hung_task.c')
| -rw-r--r-- | kernel/hung_task.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/hung_task.c b/kernel/hung_task.c index 1d92016b0b3c..6ca859715d8a 100644 --- a/kernel/hung_task.c +++ b/kernel/hung_task.c @@ -127,7 +127,7 @@ static void check_hung_task(struct task_struct *t, unsigned long timeout) * Ok, the task did not get scheduled for more than 2 minutes, * complain: */ - if (sysctl_hung_task_warnings) { + if (sysctl_hung_task_warnings || hung_task_call_panic) { if (sysctl_hung_task_warnings > 0) sysctl_hung_task_warnings--; pr_err("INFO: task %s:%d blocked for more than %ld seconds.\n", |