linux-kernel - RE: [PATCH] kernel/hung_task.c: force ignore

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Message-ID: <27240C0AC20F114CBF8149A2696CBE4A6015A8D9@SHSMSX101.ccr.corp.intel.com>
Date:   Mon, 10 Dec 2018 05:58:02 +0000
From:   "Liu, Chuansheng" <chuansheng.liu@...el.com>
To:     Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
CC:     "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "pmladek@...e.com" <pmladek@...e.com>,
        "sergey.senozhatsky@...il.com" <sergey.senozhatsky@...il.com>,
        "rostedt@...dmis.org" <rostedt@...dmis.org>,
        "dvyukov@...gle.com" <dvyukov@...gle.com>,
        "penguin-kernel@...ove.SAKURA.ne.jp" 
        <penguin-kernel@...ove.sakura.ne.jp>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] kernel/hung_task.c: force ignore_loglevel before panic



> -----Original Message-----
> From: Sergey Senozhatsky [mailto:sergey.senozhatsky.work@...il.com]
> Sent: Monday, December 10, 2018 1:46 PM
> To: Liu, Chuansheng <chuansheng.liu@...el.com>
> Cc: akpm@...ux-foundation.org; pmladek@...e.com;
> sergey.senozhatsky@...il.com; rostedt@...dmis.org; dvyukov@...gle.com;
> penguin-kernel@...ove.SAKURA.ne.jp; linux-kernel@...r.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 task_struct *t,
> unsigned long timeout)
> >                         init_utsname()->version);
> >                 pr_err("\"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\""
> >                         " disables this message.\n");
> > +               /* When sysctl_hung_task_panic is set, we have to force
> > +                * ignore_loglevel to get really useful hung task
> > +                * information.
> > +                */
> > +               if (sysctl_hung_task_panic && !ignore_loglevel)
> > +                       ignore_loglevel = true;
> 
> 		console_verbose()?

Thanks Sergey, it is really my need. I will prepare for a new version of patch:)