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Re: [Xen-devel] shutdown question - PV vs HVM

To: James Harper <james.harper@xxxxxxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] shutdown question - PV vs HVM
From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date: Fri, 05 Oct 2007 14:49:32 +0100
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On 5/10/07 14:48, "James Harper" <james.harper@xxxxxxxxxxxxxxxx> wrote:

>> 
>> For a PV guest, a shutdown node is written into xenstore which the
> guest
>> picks up. The guest will then usually initiate a clean shutdown.
>> 
> 
> My Windows PV drivers now know how to put a watch on something, so by
> putting a watch on 'control' I can see the shutdown request from Dom0
> (written to 'control/shutdown' I think). As I do nothing currently
> though, a forced shutdown occurs very soon after.
> 
> If I understand the code correctly, as soon as I see the
> control/shutdown node appear, I should read it, and then write a blank
> string into it, which acknowledges the shutdown request and stops the
> forced shutdown. I should then give windows the shutdown or reboot
> command, depending on what I read from the xenstore node.
> 
> Sound good?

Yep, that sounds about right.

 -- Keir



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