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References: <bug-15076-6666@http.bugzilla.kernel.org/>
	 <201001221017.o0MAHQmu015858@demeter.kernel.org>
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Date: Mon, 25 Jan 2010 12:33:09 +0100
Message-ID: <c2673ca61001250333p33305d3fma638d73c0d448e17@mail.gmail.com>
Subject: Re: [Bug 15076] System panic under load with clockevents_program_event
From: okias <d.okias@gmail.com>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: LKML <linux-kernel@vger.kernel.org>, bugzilla-daemon@bugzilla.kernel.org,
       x86@kernel.org
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Okey, I try without highmem soon.

2010/1/25, Thomas Gleixner <tglx@linutronix.de>:
> Switched to email. Please reply to all instead of using the bugzilla
> interface.
>
>> --- Comment #4 from okias <d.okias@gmail.com>  2010-01-22 10:17:25 ---
>> and it's regression. Now I work on 2.6.32.3 and no problem.
>
> That's a really weird one. The system is 50 min up and running and out
> of the blue it crashes in clockevents_program_event(). This function
> has been called a couple of thousand times before that point.
>
> The only way to crash there is when *dev is pointing into nirwana. dev
> comes from
>
> int tick_program_event(ktime_t expires, int force)
> {
>         struct clock_event_device *dev =
> __get_cpu_var(tick_cpu_device).evtdev;
>
> according to the callchain. At this point nothing fiddles with
> tick_cpu_device.evtdev, so I suspect some really nasty memory
> corruption going on.
>
> okias, can you please disable highmem support and verify whether the
> problem persists ?
>
> Thanks,
>
> 	tglx
>


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