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| author | Mike Snitzer <snitzer@redhat.com> | 2016-05-25 04:16:51 +0300 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2016-06-10 22:16:02 +0300 |
| commit | e83068a5faafb8ca65d3b58bd1e1e3959ce1ddce (patch) | |
| tree | 9158ec7acad94d7035153f84e8ff53205caf7315 /drivers/md/dm-rq.h | |
| parent | bf661be1fcf9b1da8abc81a56ff41ce5964ce896 (diff) | |
| download | linux-e83068a5faafb8ca65d3b58bd1e1e3959ce1ddce.tar.xz | |
dm mpath: add optional "queue_mode" feature
Allow a user to specify an optional feature 'queue_mode <mode>' where
<mode> may be "bio", "rq" or "mq" -- which corresponds to bio-based,
request_fn rq-based, and blk-mq rq-based respectively.
If the queue_mode feature isn't specified the default for the
"multipath" target is still "rq" but if dm_mod.use_blk_mq is set to Y
it'll default to mode "mq".
This new queue_mode feature introduces the ability for each multipath
device to have its own queue_mode (whereas before this feature all
multipath devices effectively had to have the same queue_mode).
This commit also goes a long way to eliminate the awkward (ab)use of
DM_TYPE_*, the associated filter_md_type() and other relatively fragile
and difficult to maintain code.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-rq.h')
| -rw-r--r-- | drivers/md/dm-rq.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/dm-rq.h b/drivers/md/dm-rq.h index 1559f6486024..9e6f0a3773d4 100644 --- a/drivers/md/dm-rq.h +++ b/drivers/md/dm-rq.h @@ -49,7 +49,7 @@ bool dm_use_blk_mq_default(void); bool dm_use_blk_mq(struct mapped_device *md); int dm_old_init_request_queue(struct mapped_device *md); -int dm_mq_init_request_queue(struct mapped_device *md, struct dm_target *immutable_tgt); +int dm_mq_init_request_queue(struct mapped_device *md, struct dm_table *t); void dm_mq_cleanup_mapped_device(struct mapped_device *md); void dm_start_queue(struct request_queue *q); |