This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
Home Products Support Community News


[Xen-devel] treatment grant frames during save/restore

To: <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: [Xen-devel] treatment grant frames during save/restore
From: "Jan Beulich" <JBeulich@xxxxxxxxxx>
Date: Thu, 27 May 2010 16:27:17 +0100
Delivery-date: Thu, 27 May 2010 08:29:03 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
>From what I can tell, grant frames get no special treatment by the tools
during save, and hence get treated as normal memory during restore.
If that's correct, it would seem that there's an accounting issue, since
during restore a normal RAM page will be allocated by the tools for each
grant frame, hence a domain that prior to save was below its limit
could now end up crossing that limit, and thus unexpectedly fail to
restore. If that's not a possibility, what am I missing?

Thanks, Jan

Xen-devel mailing list