Test zero write in byte range 512~1024 for 4k alignment.
Signed-off-by: NFam Zheng <famz@redhat.com>
Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: NKevin Wolf <kwolf@redhat.com>
Message-id: 1431522721-3266-4-git-send-email-famz@redhat.com
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
(cherry picked from commit ab53c447)
Signed-off-by: NMichael Roth <mdroth@linux.vnet.ibm.com>