Subject: Re: [2.6.21.1] OOPS in timer stats code
From: Thomas Gleixner <tglx@linutronix.de>
To: Chuck Ebbert <cebbert@redhat.com>
Cc: Michal Piotrowski <michal.k.k.piotrowski@gmail.com>,
       Folkert van Heusden <folkert@vanheusden.com>,
       linux-kernel@vger.kernel.org, Ingo Molnar <mingo@elte.hu>
In-Reply-To: <4649FDEA.2050703@redhat.com>
References: <3644.62.177.207.163.1179227559.squirrel@klant.bhosted.nl>
	 <6bffcb0e0705150433o95c801eo4818a9f36e5bb770@mail.gmail.com>
	 <4649FDEA.2050703@redhat.com>
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Date: Wed, 16 May 2007 00:14:52 +0200
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On Tue, 2007-05-15 at 14:37 -0400, Chuck Ebbert wrote:
> Michal Piotrowski wrote:
> > [Adding Thomas to CC]

Added Ingo as well :)

> > On 15/05/07, Folkert van Heusden <folkert@vanheusden.com> wrote:
> >> Hi,
> >>
> >> After an uptime of, say, 4 hours I got an oops on my P4 with HT and
> >> 2GB ram.
> >> It has dynamic ticks enabled as well has timer stats. I cannot reboot the
> >> machine to give more details right now (19:00 gmt+1 i can).
> >>
> >> For now, this is the oops:
> >>
> >> [13092.479019] BUG: unable to handle kernel paging request at virtual
> >> address b9d0458f
> 
> Timer hash list contains a user address.

Dammit. It's a HT enabled box again. I don't have one.

Folkert, does the problem go away when you disable HT
(CONFIG_SCHED_SMT) ?

	tglx


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