linux-kernel - Re: [2.6.21.1] OOPS in timer stats code

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Date:	Wed, 16 May 2007 00:14:52 +0200
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Chuck Ebbert <cebbert@...hat.com>
Cc:	Michal Piotrowski <michal.k.k.piotrowski@...il.com>,
	Folkert van Heusden <folkert@...heusden.com>,
	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>
Subject: Re: [2.6.21.1] OOPS in timer stats code

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@...heusden.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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