From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dan Magenheimer Subject: RE: treatment grant frames during save/restore Date: Thu, 27 May 2010 08:50:01 -0700 (PDT) Message-ID: <23b54208-e368-43b0-95aa-3a87e66fa9c7@default> References: <4BFEAB750200007800004444@vpn.id2.novell.com 4BFEADDE0200007800004455@vpn.id2.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <4BFEADDE0200007800004455@vpn.id2.novell.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Jan Beulich , xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org > -----Original Message----- > From: Jan Beulich [mailto:JBeulich@novell.com] > Sent: Thursday, May 27, 2010 9:38 AM > To: xen-devel@lists.xensource.com > Subject: Re: [Xen-devel] treatment grant frames during save/restore >=20 > >>> On 27.05.10 at 17:27, "Jan Beulich" wrote: > > 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? >=20 > Ooops, just noticed that I didn't say explicitly that this is for HVM > guests. There was some discussion about this last September. Here's one link: http://lists.xensource.com/archives/html/xen-devel/2009-09/msg00578.html=20