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Date: Sun, 23 Nov 2014 19:26:37 +0100
From: Oleg Nesterov <oleg@redhat.com>
To: Borislav Petkov <bp@alien8.de>
Cc: lkml <linux-kernel@vger.kernel.org>, Rik van Riel <riel@redhat.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Steven Rostedt <rostedt@goodmis.org>, x86-ml <x86@kernel.org>
Subject: Re: task_stat splat
Message-ID: <20141123182637.GA15568@redhat.com>
References: <20141123111220.GA6436@pd.tnic> <20141123172256.GA9625@redhat.com> <20141123174604.GA4054@pd.tnic>
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On 11/23, Borislav Petkov wrote:
>
> On Sun, Nov 23, 2014 at 06:22:56PM +0100, Oleg Nesterov wrote:
> > Could you identify somehow the line which matches
> > task_sched_runtime+0x99 ? Probably do_task_delta_exec()...
>
> See http://marc.info/?l=linux-kernel&m=141675498417759&w=2
>
> Chris triggers the same splat and reverting
>
> 6e998916dfe3 ("sched/cputime: Fix clock_nanosleep()/clock_gettime() inconsistency")
>
> fixes the issue for him. I'm testing that same thing reverted too, first
> resume cycle looks good.

Yes, this probably confirms the theory, stop_class needs update_curr.

Oleg.