From mboxrd@z Thu Jan 1 00:00:00 1970 From: Konrad Rzeszutek Wilk Subject: Re: xen/stable-2.6.32.x xen-4.1.1 live migration fails with kernels 2.6.39, 3.0.3 and 3.1-rc2 Date: Wed, 24 Aug 2011 16:34:35 -0400 Message-ID: <20110824203435.GA27865@dumpdata.com> References: <4E4EA3E2.2040809@leuphana.de> <4E52224902000078000525CC@nat28.tlf.novell.com> <4E52601B.5060609@leuphana.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <4E52601B.5060609@leuphana.de> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Andreas Olsowski Cc: "xen-devel@lists.xensource.com" , Jan Beulich List-Id: xen-devel@lists.xenproject.org On Mon, Aug 22, 2011 at 03:56:43PM +0200, Andreas Olsowski wrote: > >Does it also fail the other way round (host2 -> host1)? If not, your > >issue is likely fixed with 23102:1c7b601b1b35 on 4.1-testing (and > >with you posting on xen-devel rather than xen-users I would really > >have expected that you would have looked for similar reports or > >eventual fixes before complaining). > > It did happen host2->host1 and host1->host2 with xen4.1.1- > > I did set up 2 servers with identical hardware now and in fact i > dont have any problems with them migrating machines. > > I went on to upgrade all 3 servers (2x 32gb 1x96gb) to xen-4.1-testing. Did you check that your xen-4.1-testing had the patch above? > > Now i can migrate 32gbhost->32gbhost and 32gbhost->96gbhost but > 96gbhost->32gbhost still fails. > > BUG: unable to handle kernel paging request at fffffffffffffff8 > with 2.6.39 and 3.1 guest kernels, 3.0 didnt produce any output on > its tty0 anymore. > > > This issue may be a little more then a memory size mismatch, since i > have 3 servers running xen4.2 with 96gb ram two Dell R610s and one > R710, where the R610s can migrate guests between each other just > fine. > They can also migrate to the R710 and back. > But a host created on the R710 cant be migrated to a R610. > > The same exact thing happens with 4.1-testing. > A guest created on a 32gb host can be migrated to the 96gb host and > back to any 32gb host. > But a guest created on the 96gb host can not be migrated to a 32gb host. Which sounds like the patch above should have fixed. Again, did you check your binary and source tree to see if you have the mentioned patch?