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

To: "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-devel] shutdown question - PV vs HVM
From: "James Harper" <james.harper@xxxxxxxxxxxxxxxx>
Date: Fri, 5 Oct 2007 23:48:01 +1000
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Thread-topic: [Xen-devel] shutdown question - PV vs HVM
> 
> 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?

Thanks

James


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