linux-kernel - Re: [Bug 15076] System panic under load with clockevents_program

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Message-ID: <c2673ca61001260607v5fe6c13ai54d10100088382f6@mail.gmail.com>
Date:	Tue, 26 Jan 2010 15:07:45 +0100
From:	okias <d.okias@...il.com>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	bugzilla-daemon@...zilla.kernel.org, x86@...nel.org
Subject: Re: [Bug 15076] System panic under load with clockevents_program_event

Lastest git without HIGHMEM look good. If no problems occur, then I
try use kernel with HIGHMEM and see what change...

2010/1/25, okias <d.okias@...il.com>:
> Okey, I try without highmem soon.
>
> 2010/1/25, Thomas Gleixner <tglx@...utronix.de>:
>> Switched to email. Please reply to all instead of using the bugzilla
>> interface.
>>
>>> --- Comment #4 from okias <d.okias@...il.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
>>
>
>
> --
> Jabber/XMPP: okias@...eek.info
> SIP VoIP: sip:17474537254@...xy01.sipphone.com
>


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