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Re: [Xen-devel] [PATCH] xenlinux i386: don't force a reboot on panics

To: "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH] xenlinux i386: don't force a reboot on panics
From: "Jan Beulich" <JBeulich@xxxxxxxxxx>
Date: Mon, 22 Aug 2005 11:17:26 +0200
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>>> Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> 22.08.05 11:05:43 >>>
>
>On 22 Aug 2005, at 09:16, Jan Beulich wrote:
>
>> This is supposed to be configurable (eg on the command line), not
>> hard-coded (also, x86_64 didn't try to do similar things).
>
>What is? panic_timeout?
>
>Seems sensible on a VMM to inform control software as quickly as 
>possible that you've crashed, rather than spinning in a loop trying to

>blink a keyboard led that doesn't exist.

I agree to that part.

>Even the concept of a timeout before restart makes little sense -- the

>console output has been sent to an external daemon so it shouldn't get

>lost like it would if it was printed to vga console and you did a real

>physical reboot.

But not completely here: If I don't have a serial console attached (in
fact I never even tried to), then the information *IS* lost. Hence this
should still be configurable, but you may clearly chose a default mode
that in fact does reboot immediately.

Further, as indicated, x86_64 behavior is different from i386's, which
already points to pre-exisiting consistency issues.

Jan

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