Paolo Bonzini 3ba0e1a00c block/io: take bs->reqs_lock in bdrv_mark_request_serialising
bdrv_mark_request_serialising is writing the overlap_offset and
overlap_bytes fields of BdrvTrackedRequest.  Take bs->reqs_lock
for the whole duration of it, and not just when waiting for
serialising requests, so that tracked_request_overlaps does not
look at a half-updated request.

The new code does not unlock/relock around retries.  This is unnecessary
because a retry is always preceded by a CoQueue wait, which already
releases and reacquires bs->reqs_lock.

Reported-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 1578495356-46219-4-git-send-email-pbonzini@redhat.com
Message-Id: <1578495356-46219-4-git-send-email-pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2020-01-30 20:59:41 +00:00
..
2019-10-28 12:05:30 +01:00
2019-10-28 11:34:35 +01:00
2019-10-28 14:40:01 +00:00