linux-kernel - Re: crashme fault

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Date:	Sun, 16 Sep 2007 09:17:54 -0700
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Andrea Arcangeli <andrea@...e.de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: crashme fault

On Sun, 16 Sep 2007 17:53:21 +0200 Andrea Arcangeli wrote:

> On Wed, Sep 12, 2007 at 10:21:51PM -0700, Randy Dunlap wrote:
> > I run almost-daily kernel testing.  I haven't seen 'crashme' cause a
> > kernel fault until today, and now I've seen it twice on 2.6.23-rc6-git2,
> 
> Did the room temperature change in the server room? ;) Those early

I rarely go there, but when I do, it's usually very cool.
But I have no way of tracking the room temp there.

> EM64T P4 core based are fast but they suck a whole lot of power. It
> seems a bitflip in a cpu register. You can use cpufreq to set low
> frequency (they should support it, and they shouldn't use more than
> 100w per core that way) to lower the temp, and see if the problem goes
> away. If it's a software issue it will hopefully be still reproducible
> with ~2ghz instead of 3.4ghz.


---
~Randy
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