-
由 Zhang Haoyu 提交于
If there are still pending i/o while deleting snapshot, because deleting snapshot is done in non-coroutine context, and the pending i/o read/write (bdrv_co_do_rw) is done in coroutine context, so it's possible to cause concurrency problem between above two operations. Add bdrv_drain_all() to bdrv_snapshot_delete() to avoid this problem. Signed-off-by: NZhang Haoyu <zhanghy@sangfor.com> Reviewed-by: NPaolo Bonzini <pbonzini@redhat.com> Message-id: 201410211637596311287@sangfor.com Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com> (cherry picked from commit 3432a192) Signed-off-by: NMichael Roth <mdroth@linux.vnet.ibm.com>
b57b7ec3