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dataplane: enable virtio-blk x-data-plane=on live migration

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Although the dataplane thread does not cooperate with dirty memory
logging yet it's fairly easy to temporarily disable dataplane during
live migration.  This way virtio-blk can live migrate when
x-data-plane=on.

The dataplane thread will restart after migration is cancelled or if the
guest resuming virtio-blk operation after migration completes.

Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2013-07-29 15:01:59 +02:00
parent 02edd2e766
commit 84db52d059
3 changed files with 33 additions and 9 deletions
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1
include/hw/virtio/virtio-blk.h
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@ -125,6 +125,7 @@ typedef struct VirtIOBlock {
unsigned short sector_mask;
VMChangeStateEntry *change;
#ifdef CONFIG_VIRTIO_BLK_DATA_PLANE
Notifier migration_state_notifier;
struct VirtIOBlockDataPlane *dataplane;
#endif
} VirtIOBlock;