Re: [Qemu-devel] qemu and qemu.git -> Migration + disk stress introduces qcow2 corruptions

[Lucas Meneghel Rodrigues]

On 11/09/2011 05:25 PM, Juan Quintela wrote:
> Lucas Meneghel Rodrigues<address@hidden>  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?

Just tried it, it conclusively fixes the corruption problems. Reported 
it on the patch email.

> Thanks, Juan.