diff options
| author | Mike Snitzer <snitzer@redhat.com> | 2016-11-23 13:51:09 -0500 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2016-12-08 14:12:52 -0500 |
| commit | 6936c12cf809850180b24947271b8f068fdb15e9 (patch) | |
| tree | bd761b5f771b2c79b445814772e955cd97d43606 /tools/perf/scripts/python/syscall-counts.py | |
| parent | 6599c84e4ce6e428180f9958c7c40aa4202d8072 (diff) | |
dm table: fix 'all_blk_mq' inconsistency when an empty table is loaded
An earlier DM multipath table could have been build ontop of underlying
devices that were all using blk-mq. In that case, if that active
multipath table is replaced with an empty DM multipath table (that
reflects all paths have failed) then it is important that the
'all_blk_mq' state of the active table is transfered to the new empty DM
table. Otherwise dm-rq.c:dm_old_prep_tio() will incorrectly clone a
request that isn't needed by the DM multipath target when it is to issue
IO to an underlying blk-mq device.
Fixes: e83068a5 ("dm mpath: add optional "queue_mode" feature")
Cc: stable@vger.kernel.org # 4.8+
Reported-by: Bart Van Assche <bart.vanassche@sandisk.com>
Tested-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts.py')
0 files changed, 0 insertions, 0 deletions