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| author | Mike Snitzer <snitzer@redhat.com> | 2015-03-11 19:01:09 (GMT) |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2015-04-15 16:10:17 (GMT) |
| commit | 17e149b8f73ba116e71e25930dd6f2eb3828792d (patch) | |
| tree | 6407112dbb113ffeebfd0620df27d4f67cd27ed1 /drivers/md/dm.h | |
| parent | 022333427a8aa4ccb318a9db90cea4e69ca1826b (diff) | |
| download | linux-17e149b8f73ba116e71e25930dd6f2eb3828792d.tar.xz | |
dm: add 'use_blk_mq' module param and expose in per-device ro sysfs attr
Request-based DM's blk-mq support defaults to off; but a user can easily
change the default using the dm_mod.use_blk_mq module/boot option.
Also, you can check what mode a given request-based DM device is using
with: cat /sys/block/dm-X/dm/use_blk_mq
This change enabled further cleanup and reduced work (e.g. the
md->io_pool and md->rq_pool isn't created if using blk-mq).
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm.h')
| -rw-r--r-- | drivers/md/dm.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/md/dm.h b/drivers/md/dm.h index 5522422..6123c2b 100644 --- a/drivers/md/dm.h +++ b/drivers/md/dm.h @@ -211,6 +211,8 @@ int dm_kobject_uevent(struct mapped_device *md, enum kobject_action action, void dm_internal_suspend(struct mapped_device *md); void dm_internal_resume(struct mapped_device *md); +bool dm_use_blk_mq(struct mapped_device *md); + int dm_io_init(void); void dm_io_exit(void); @@ -220,7 +222,8 @@ void dm_kcopyd_exit(void); /* * Mempool operations */ -struct dm_md_mempools *dm_alloc_md_mempools(unsigned type, unsigned integrity, unsigned per_bio_data_size); +struct dm_md_mempools *dm_alloc_md_mempools(struct mapped_device *md, unsigned type, + unsigned integrity, unsigned per_bio_data_size); void dm_free_md_mempools(struct dm_md_mempools *pools); /* |