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Re: [Xen-devel] [PATCH] change VGA yield behavior

from [Jan Beulich]

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To:	"Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject:	Re: [Xen-devel] [PATCH] change VGA yield behavior
From:	"Jan Beulich" <jbeulich@xxxxxxxxxx>
Date:	Thu, 08 Feb 2007 08:54:20 +0000
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>>> Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> 07.02.07 19:13 >>>
>On 7/2/07 17:18, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote:
>
>> Make the default VGA console yield behavior more debugging friendly by
>> allowing Xen to print to the console (by default) even after dom0
>> started, as long as the VGA card is not in graphics mode.
>> 
>> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>
>
>This seems a bit iffy, at least as default. The usage scenario is to catch

Yes, I don't like the way it's done too much, either, but didn't find a smarter
way.

>crashes that take out the machine enough that 'xm dmesg' cannot be used,
>where there is no serial line to catch the output, and where the bug is not
>easily repro'able, right?

Correct - namely dom0 crashes (perhaps preceded by some Xen messages)
and hypervisor crashes.

Jan

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