RE: Panics need better handling
From: Cress, Andrew R (andrew.r.cress_at_intel.com)
Date: 06/14/04
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Date: Mon, 14 Jun 2004 10:20:48 -0400 To: "John Bradford" <john@grabjohn.com>, "Helge Hafting" <helgehaf@aitel.hist.no>, <ndiamond@despammed.com>
For Intel servers, there is some help in 2.4. It is now included within
the OpenIPMI driver.
It saves the panic info into a firmware log.
See http://sourceforge.net/projects/openipmi/ and http://panicsel.sf.net
(more info, plus a 'showsel' utility to view the firmware log).
The parameter to save this isn't turned on by default in OpenIPMI, but
it is there in 2.4 kernels (CONFIG_IPMI_PANIC_EVENT).
Andy Cress
-----Original Message-----
From: linux-kernel-owner@vger.kernel.org
[mailto:linux-kernel-owner@vger.kernel.org] On Behalf Of John Bradford
Sent: Monday, June 14, 2004 3:44 AM
To: Helge Hafting; ndiamond@despammed.com
Cc: linux-kernel@vger.kernel.org
Subject: Re: Panics need better handling
Quote from Helge Hafting <helgehaf@aitel.hist.no>:
> ndiamond@despammed.com wrote:
>
> > I am not asking for
> >help in solving this particular panic,
> >I am asking for help in general, in
> >getting information displayed when it
> >needs to be displayed.
> >
> >
> I have struggled with this from time to time. Wanting to
> report a trace, but it is too long for the screen.
>
> Using a framebuffer console helps a lot. I use 1280x1024 resolution,
> and 8x8 characters. The resulting 160x128 console isn't
> that fun to _work_ with, but most panics/oopses fit. I rarely
> work at the console anyway. If you do, consider making two almost
> identical kernels where console font size is the only difference.
(The
> extra compile takes very little time.) Then use the small-font kernel
> when debugging.
On the other hand, if like me you use a text-based console almost
exclusively,
then the best course of action is probably to buy a real serial
terminal, (or
several :-) ), and configure one of them as the console. Then you can
basically ignore the VGA display completely.
John.
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