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| author | Mike Snitzer <snitzer@redhat.com> | 2015-03-11 20:01:09 +0100 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2015-04-15 18:10:17 +0200 |
| commit | 17e149b8f73ba116e71e25930dd6f2eb3828792d (patch) | |
| tree | 6407112dbb113ffeebfd0620df27d4f67cd27ed1 /init/do_mounts.c | |
| parent | dm: optimize dm_mq_queue_rq to _not_ use kthread if using pure blk-mq (diff) | |
| download | linux-17e149b8f73ba116e71e25930dd6f2eb3828792d.tar.xz linux-17e149b8f73ba116e71e25930dd6f2eb3828792d.zip | |
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>
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