Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756484Ab1FJPjp (ORCPT ); Fri, 10 Jun 2011 11:39:45 -0400 Received: from mx1.redhat.com ([209.132.183.28]:58279 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752304Ab1FJPjn (ORCPT ); Fri, 10 Jun 2011 11:39:43 -0400 Message-ID: <4DF23A92.8050909@redhat.com> Date: Fri, 10 Jun 2011 17:38:58 +0200 From: Igor Mammedov User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.17) Gecko/20110419 Red Hat/3.1.10-1.el6_0 Lightning/1.0b2 Thunderbird/3.1.10 MIME-Version: 1.0 To: Tim Deegan CC: Pasi K?rkk?inen , xen-devel@lists.xensource.com, Keir Fraser , Stabellini , "containers@lists.linux-foundation.org" , Li Zefan , "linux-kernel@vger.kernel.org" , Michal Hocko , "linux-mm@kvack.org" , Keir Fraser , Paul Menage , Hiroyuki Kamezawa , "akpm@linux-foundation.org" , Hiroyuki , "balbir@linux.vnet.ibm.com" Subject: Re: [Xen-devel] Possible shadow bug References: <4DEE26E7.2060201@redhat.com> <20110608123527.479e6991.kamezawa.hiroyu@jp.fujitsu.com> <4DF0801F.9050908@redhat.com> <20110609150133.GF5098@whitby.uk.xensource.com> <4DF0F90D.4010900@redhat.com> <20110610100139.GG5098@whitby.uk.xensource.com> <20110610101011.GH5098@whitby.uk.xensource.com> <20110610114821.GB32595@reaktio.net> <20110610124034.GI5098@whitby.uk.xensource.com> In-Reply-To: <20110610124034.GI5098@whitby.uk.xensource.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1595 Lines: 42 On 06/10/2011 02:40 PM, Tim Deegan wrote: > At 14:48 +0300 on 10 Jun (1307717301), Pasi K?rkk?inen wrote: >> On Fri, Jun 10, 2011 at 11:10:11AM +0100, Tim Deegan wrote: >>> At 11:01 +0100 on 10 Jun (1307703699), Tim Deegan wrote: >>>> ISTR that even though the RHEL xen reports a 3.0.x version it has quite >>>> a lot of backports in it. Does it have this patch? >>>> http://hg.uk.xensource.com/xen-3.1-testing.hg/rev/e8fca4c42d05 >>> Oops, that URL doesn't work; I meant this: >>> http://xenbits.xen.org/xen-3.1-testing.hg/rev/e8fca4c42d05 >>> >> RHEL5 Xen (hypervisor) reports version as 3.1.2-xyz.. > Based on a quick scrobble through the CentOS 5.6 SRPMs it looks like a > 3.1.0 hypervisor with a bunch of extra patches, but not this one. This > is very likely the cause of the crash in mem_cgroup_create(), and > probably the corruptions too. That would explain why they didn't happen > on a 4.0.x SLES11 Xen, but not really why the original patch in this > thread made it go away. > Maybe it changes timing so that imul is executed with correct memory content? Putting extra printk inside zone loop or flushing tlb before it also make problem go away. Or may be problem just becomes invisible and memory is corrupted at another place. PS: Well, never mind. I do not know what I'm talking about. > Cheers, > > Tim. > -- Thanks, Igor -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/