On 16/06/2016 08:58, Denis V. Lunev wrote:
> Actually I have found this problem running iotest 132 for active async
> mirror I have sent yesturday. Anyway, the problem is actual for current
> backup/mirror implementation.
> 
> bdrv_co_discard must mark areas dirty after writing zeroes, it must call
> before_write_notifier chain to push underlying data to backup and it also
> must properly fill tracked request information.
> 
> Signed-off-by: Denis V. Lunev <d...@openvz.org>
> CC: Vladimir Sementsov-Ogievskiy<vsement...@virtuozzo.com>
> CC: Stefan Hajnoczi <stefa...@redhat.com>
> CC: Fam Zheng <f...@redhat.com>
> CC: Kevin Wolf <kw...@redhat.com>
> CC: Max Reitz <mre...@redhat.com>

Three good catches!  Thanks for these patches.  I think 2 and 3 should
be Cced to qemu-stable too.

Reviewed-by: Paolo Bonzini <pbonz...@redhat.com>

Paolo

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