From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ian Campbell Subject: RE: [timer/ticks related] dom0 hang during boot on large 1TB system Date: Mon, 4 Jan 2010 22:21:16 +0000 Message-ID: <1262643676.28737.15.camel@localhost.localdomain> References: <296fb010-9c01-4285-895e-35532a8e0726@default> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <296fb010-9c01-4285-895e-35532a8e0726@default> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Dan Magenheimer Cc: "kurt.hackel@oracle.com" , Jeremy Fitzhardinge , "Xen-devel@lists.xensource.com" , Keir Fraser , Jan Beulich List-Id: xen-devel@lists.xenproject.org On Mon, 2010-01-04 at 22:07 +0000, Dan Magenheimer wrote: > > From: Jan Beulich [mailto:JBeulich@novell.com] > > > > >>> Jeremy Fitzhardinge 22.12.09 19:03 >>> > > >On 12/22/2009 09:02 AM, Jan Beulich wrote: > > >> No, that won't help. I'm referring to things like Dom0 > > accesses to the > > >> M2P table it sees, which doesn't cover even nearly all > > memory. I can't > > >> say whether that can go without problem, but without > > closely looking > > >> at it I don't think you can assume this would work. > > Likewise I would > > >> suspect tools issues (if you use the tools from > > xen-unstable et al), > > >> though I have no precise pointer right now at specific issues. > > >> > > > > > >32-bit dom0 is the standard use model for Citrix product, > > and I think > > >people tend to run it even with xen-unstable. Its a fairly > > well-tested > > >combination. > > > > But very unlikely with 1Tb of memory, don't you think? > > > > Jan > > Only because machines with 1TB are rare/unlikely. I can't > speak for the Citrix product but there is NO supported > configuration (yet) of the Oracle VM product with a 64-bit dom0. > In other words, if a customer is using a released Oracle VM > product and the machine on which they are running it has 1TB > of physical memory, they ARE using a 32-bit dom0. > > However, Oracle VM always specifies a dom0_mem= Xen boot parameter. > (which is always much smaller than 1TB). So do XenServer and XCP, FWIW. Ian.