linux-kernel - Re: [BUG] Something goes wrong with timer statistics.

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Message-Id: <1180478288.20546.39.camel@chaos>
Date:	Wed, 30 May 2007 00:38:08 +0200
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Michal Piotrowski <michal.k.k.piotrowski@...il.com>
Cc:	Ian Kumlien <iank@...dband.net>, Linux-kernel@...r.kernel.org,
	Ingo Molnar <mingo@...e.hu>,
	Arjan van de Ven <arjan@...radead.org>
Subject: Re: [BUG] Something goes wrong with timer statistics.

On Wed, 2007-05-30 at 00:24 +0200, Michal Piotrowski wrote:
> Hi Ian,
> 
> (Thomas "The Wizard of Time" added to CC :))

Added more wizards :)

> On 29/05/07, Ian Kumlien <iank@...dband.net> wrote:
> > Hi,
> >
> > As the daystar sets, i try to play some with my new would be
> > firewall/server, but since this will be running for quite some time i
> > have been experimenting with powertop to find out what i can do to limit
> > it's power usage.
> >
> > But, if i run powertop for too long or a few times to many... this
> > happens:
> > http://pomac.netswarm.net/pics/kernel_panic.jpg

This was reported before. It's incredibly hard to reproduce.

Ian, is this happening reproducible ?

> > If i don't run powertop, it is rock solid... Compiling for hours,
> > running memtest for hours etc etc...
> 
> (Where is my magic ball?)
> 
> Let me guess - Pentium 4 with HT?

I might be wrong, but it's a newer core duo thingy.

	tglx


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