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

[Lucas Meneghel Rodrigues]

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.

Thanks,

Lucas