From mboxrd@z Thu Jan 1 00:00:00 1970 From: Juan Quintela Subject: Re: qemu and qemu.git -> Migration + disk stress introduces qcow2 corruptions Date: Wed, 09 Nov 2011 20:25:20 +0100 Message-ID: References: <4EBAAA68.10801@redhat.com> Reply-To: quintela@redhat.com Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: QEMU devel , KVM mailing list , Avi Kivity , Marcelo Tosatti , Anthony Liguori , Kevin Wolf , "Michael S. Tsirkin" To: Lucas Meneghel Rodrigues Return-path: Received: from mx1.redhat.com ([209.132.183.28]:63716 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752351Ab1KITxR (ORCPT ); Wed, 9 Nov 2011 14:53:17 -0500 In-Reply-To: <4EBAAA68.10801@redhat.com> (Lucas Meneghel Rodrigues's message of "Wed, 09 Nov 2011 14:29:28 -0200") Sender: kvm-owner@vger.kernel.org List-ID: Lucas Meneghel Rodrigues wrote: > Hi guys, here I am, reporting yet another issue with qemu. This time, > it's something that was first reported in January, and Juan proposed a > patch for it: > > http://comments.gmane.org/gmane.comp.emulators.qemu/89009 > > [PATCH 4/5] Reopen files after migration > > The symptom is, when running disk stress or any intense IO operation > in guest while migrating it causes a qcow2 corruption. We've seen this > consistently on the daily test jobs, both for qemu and qemu-kvm. The > test that triggers it is autotest stress test running on a VM with > ping-pong background migration. > > The fix proposed by Juan is on our RHEL branch and such a problem does > not happen on the RHEL branch. So, what about re-considering Juan's > patch, or maybe work out a solution that is satisfactory for the > upstream maintainers? > > I'll open a launchpad bug with this report. I have just sent: [RFC PATCH 0/2] Fix migration with NFS & iscsi/Fiber channel Only the 1st patch on that series are needed to fix that problem. Could you try it? Thanks, Juan.