On Wed, Sep 07, 2016 at 05:20:49PM +0200, Ladi Prosek wrote: > The statistics virtqueue is not migrated properly because virtio-balloon > does not include s->stats_vq_elem in the migration stream. > > After migration the statistics virtqueue hangs because the host never > completes the last element (s->stats_vq_elem is NULL on the destination > QEMU). Therefore the guest never submits new elements and the virtqueue > is hung. > > Instead of changing the migration stream format in an incompatible way, > detect the migration case and rewind the virtqueue so the last element > can be completed. > > Cc: Michael S. Tsirkin <m...@redhat.com> > Cc: Roman Kagan <rka...@virtuozzo.com> > Cc: Stefan Hajnoczi <stefa...@redhat.com> > Suggested-by: Roman Kagan <rka...@virtuozzo.com> > Signed-off-by: Ladi Prosek <lpro...@redhat.com> > --- > hw/virtio/virtio-balloon.c | 13 +++++++++++++ > 1 file changed, 13 insertions(+)
Reviewed-by: Roman Kagan <rka...@virtuozzo.com>
