.@google.com;
> linux-kernel@vger.kernel.org
> Subject: Re: [PATCH] kernel/hung_task.c: force ignore_loglevel before panic
>
> On Wed 2018-12-12 01:16:11, Liu, Chuansheng wrote:
> >
> >
> > > -Original Message-
> > > From: Tetsuo Handa [mailto:pengu
; > Cc: a...@linux-foundation.org; pmla...@suse.com;
> > sergey.senozhat...@gmail.com; rost...@goodmis.org; dvyu...@google.com;
> > linux-kernel@vger.kernel.org
> > Subject: Re: [PATCH] kernel/hung_task.c: force ignore_loglevel before panic
> >
&g
On Tue 2018-12-11 01:16:10, Liu, Chuansheng wrote:
> > From: Tetsuo Handa [mailto:penguin-ker...@i-love.sakura.ne.jp]
> > On 2018/12/10 15:11, Sergey Senozhatsky wrote:
> > > On (12/10/18 05:58), Liu, Chuansheng wrote:
> > >>> On (12/10/18 05:40), Liu, Chuansheng wrote:
> > @@ -130,6 +130,13
On 2018/12/11 10:16, Liu, Chuansheng wrote:
> We may enhance it by:
> - if (sysctl_hung_task_warnings) {
> + if (sysctl_hung_task_panic || sysctl_hung_task_warnings) {
> if (sysctl_hung_task_warnings > 0)
> sysctl_hung_task_warnings--;
Why
...@goodmis.org; dvyu...@google.com;
> linux-kernel@vger.kernel.org
> Subject: Re: [PATCH] kernel/hung_task.c: force ignore_loglevel before panic
>
> On 2018/12/10 15:11, Sergey Senozhatsky wrote:
> > On (12/10/18 05:58), Liu, Chuansheng wrote:
> >>> On (12/10/18 05:4
On (12/10/18 18:58), Tetsuo Handa wrote:
> +*/
> + if (sysctl_hung_task_panic && !ignore_loglevel)
> + ignore_loglevel = true;
> >>>
> >>> console_verbose()?
> >>
> >> Thanks Sergey, it is really my need. I will prepare
On 2018/12/10 15:11, Sergey Senozhatsky wrote:
> On (12/10/18 05:58), Liu, Chuansheng wrote:
>>> On (12/10/18 05:40), Liu, Chuansheng wrote:
@@ -130,6 +130,13 @@ static void check_hung_task(struct task_struct *t,
>>> unsigned long timeout)
On (12/10/18 05:58), Liu, Chuansheng wrote:
> > On (12/10/18 05:40), Liu, Chuansheng wrote:
> > > @@ -130,6 +130,13 @@ static void check_hung_task(struct task_struct *t,
> > unsigned long timeout)
> > > init_utsname()->version);
> > > pr_err("\"echo 0 >
> >
dvyu...@google.com;
> penguin-ker...@i-love.sakura.ne.jp; linux-kernel@vger.kernel.org
> Subject: Re: [PATCH] kernel/hung_task.c: force ignore_loglevel before panic
>
> On (12/10/18 05:40), Liu, Chuansheng wrote:
> > @@ -130,6 +130,13 @@ static void check_hung_task(struct tas
On (12/10/18 05:40), Liu, Chuansheng wrote:
> @@ -130,6 +130,13 @@ static void check_hung_task(struct task_struct *t,
> unsigned long timeout)
> init_utsname()->version);
> pr_err("\"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\""
>
Based on patch commit 401c636a0eeb ("kernel/hung_task.c:
show all hung tasks before panic"), we could get the
call stack of hung task.
However, if the console loglevel is not high, we still
can not get the useful information in practice, and
in most cases users don't set console loglevel to
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