From: Jarek Poplawski <jarkao2@o2.pl>
To: David Johnson <dj@david-web.co.uk>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>, netdev@vger.kernel.org
Subject: Re: Hardware bug or kernel bug?
Date: Tue, 17 Oct 2006 09:10:05 +0200 [thread overview]
Message-ID: <20061017071005.GA1742@ff.dom.local> (raw)
In-Reply-To: <200610161532.38663.dj@david-web.co.uk>
On Mon, Oct 16, 2006 at 03:32:38PM +0100, David Johnson wrote:
...
> I've found the culprit - CPU Frequency Scaling.
> With it enabled I get the reboots, with it disabled I don't. That's the same
> with every kernel version I've tried (2.6.19-rc1+rc2, 2.6.17.13 & Centos'
> 2.6.9) The system was using the p4-clockmod driver and the ondemand governor.
>
> I'm still not sure exactly what the problem is - the reboots only happen in
> the circumstances I've mentioned and are not triggered by changes in clock
> speed alone - but disabling cpufreq seems to make it go away...
I see you devoted a lot of work and time to this testing
and for sure it will help people who read this to
diagnose similar problems but I think it could be even
more valuable if you'd try (after some rest!) to find
if "Enable CPUfreq debugging" plus adding to kernel
command line cpufreq.debug=<value> (according to help
screen) would return any error messages that could be
send to bugzilla and/or cpufreq maintainer.
Best regards,
Jarek P.
prev parent reply other threads:[~2006-10-17 7:05 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-12 16:53 Hardware bug or kernel bug? David Johnson
2006-10-12 17:20 ` Arjan van de Ven
2006-10-12 19:13 ` Linus Torvalds
2006-10-13 9:20 ` David Johnson
2006-10-13 8:56 ` Jarek Poplawski
2006-10-13 9:20 ` David Johnson
2006-10-13 10:58 ` Jarek Poplawski
2006-10-13 11:56 ` David Johnson
2006-10-13 13:06 ` Jarek Poplawski
2006-10-13 16:24 ` David Johnson
2006-10-13 17:11 ` Alan Cox
2006-10-16 10:25 ` Jarek Poplawski
2006-10-16 14:32 ` David Johnson
2006-10-17 7:10 ` Jarek Poplawski [this message]
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