From mboxrd@z Thu Jan 1 00:00:00 1970 From: Samuel Thibault Subject: Re: doubt on domU segment mappings Date: Mon, 21 Jul 2008 18:08:30 +0100 Message-ID: <20080721170830.GG4501@implementation.uk.xensource.com> References: <1216659028.17572.15.camel@ec4t16cg-1518809> <20080721164244.GB4501@implementation.uk.xensource.com> <1216659873.17572.21.camel@ec4t16cg-1518809> <20080721165543.GD4501@implementation.uk.xensource.com> <1216660393.17572.30.camel@ec4t16cg-1518809> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Return-path: Content-Disposition: inline In-Reply-To: <1216660393.17572.30.camel@ec4t16cg-1518809> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Sandesh Cc: "xen-devel@lists.xensource.com" List-Id: xen-devel@lists.xenproject.org Sandesh, le Mon 21 Jul 2008 22:43:13 +0530, a =E9crit : > > > Once the domU is running how can i change them? > > > > What for? > basically right after shutdown with poweroff =3D 'preserve' option i wa= nt > to reboot the domU without having to going through the whole domain > building process. So i need to load the different domU segments again, > or at least the pt_base mapping. Well the problem is that the domU most probably has destroyed it completely already. > > > like how will i know which entries in the dom0 pgtables corresponds= to > > > kernel_seg or ramdisk_seg and so on.. > > > > Again, dom0 doesn't map them any more, it doesn't need them any more. > then how will the domU kernel memory is accessed? are they mapped to th= e > domU pg_tables? Yes. No need for anybody else to access it (except PV interfaces, but then the MFNs or grants are explicitely given by the domU). Samuel