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Re: [Xen-devel] unstable changeset 13416 (save restore: vcpu context sup

To: "Zhai, Edwin" <edwin.zhai@xxxxxxxxx>, Keir Fraser <keir@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] unstable changeset 13416 (save restore: vcpu context support) ...
From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date: Mon, 22 Jan 2007 08:37:44 +0000
Cc: Xen devel list <xen-devel@xxxxxxxxxxxxxxxxxxx>, Gerd Hoffmann <kraxel@xxxxxxxxxx>
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On 22/1/07 2:06 am, "Zhai, Edwin" <edwin.zhai@xxxxxxxxx> wrote:

>> It's used by SMP guests when bringing up APs. So that change will have to be
>> reverted. Thanks for spotting it!
> 
> keir,
> could you elaborate on this? does it means SMP guest save/restore failure?

The change to vcpu_guest_context would have broken SMP bringup for old
guests, since they know about the old layout of vcpu_guest_context.
Reverting that change will have broken HVM save/restore entirely, but Tim
has been making cleanups that should have fixed this again.

 -- Keir



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