linux-kernel - Re: WARNING: at arch/x86/kernel/cpu/perf

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Date:	Sat, 4 Feb 2012 19:09:00 +0100
From:	Stephane Eranian <eranian@...gle.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Markus Trippelsdorf <markus@...ppelsdorf.de>,
	linux-kernel@...r.kernel.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>
Subject: Re: WARNING: at arch/x86/kernel/cpu/perf_event.c:989

I am working on it. It is hard to reproduce for me.

On Sat, Feb 4, 2012 at 2:51 PM, Ingo Molnar <mingo@...e.hu> wrote:
>
> there's yet another one triggering at:
>
> [89214.962603] ------------[ cut here ]------------
> [89214.967441] WARNING: at arch/x86/kernel/cpu/perf_event.c:995 x86_pmu_start+0x79/0xd4()
> [89214.975825] Hardware name: X8DTN
> [89214.979268] Modules linked in:
> [89214.982560] Pid: 0, comm: swapper/6 Not tainted 3.3.0-rc2-tip+ #1
> [89214.988865] Call Trace:
> [89214.991533]  <IRQ>  [<ffffffff81065cc7>] warn_slowpath_common+0x7e/0x97
> [89214.998379]  [<ffffffff81065cf5>] warn_slowpath_null+0x15/0x17
> [89215.004428]  [<ffffffff8103f626>] x86_pmu_start+0x79/0xd4
> [89215.010042]  [<ffffffff810e30d1>] perf_adjust_freq_unthr_context.part.63+0xef/0x123
> [89215.018123]  [<ffffffff810e318c>] perf_event_task_tick+0x87/0x1c1
> [89215.024463]  [<ffffffff810a2370>] ? tick_nohz_handler+0xda/0xda
> [89215.030595]  [<ffffffff8108b819>] scheduler_tick+0xd1/0xf3
> [89215.036296]  [<ffffffff810720b0>] update_process_times+0x5e/0x6f
> [89215.042512]  [<ffffffff810a23e0>] tick_sched_timer+0x70/0x99
> [89215.048387]  [<ffffffff810823f9>] __run_hrtimer+0x8c/0x148
> [89215.054087]  [<ffffffff81082add>] hrtimer_interrupt+0xc1/0x18c
>
> Thanks,
>
>        Ingo
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