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| author | Christoph Hellwig <hch@lst.de> | 2017-01-22 18:32:46 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2017-01-27 15:08:35 -0700 |
| commit | eb8db831be80692bf4bda3dfc55001daf64ec299 (patch) | |
| tree | 632bf3e0d7d7d793e59f61d6f3f9ab38dadc5523 /drivers/md/dm-core.h | |
| parent | 4bf58435fae39ec2ea01a2ff9934d377add234b1 (diff) | |
| download | lwn-eb8db831be80692bf4bda3dfc55001daf64ec299.tar.gz lwn-eb8db831be80692bf4bda3dfc55001daf64ec299.zip | |
dm: always defer request allocation to the owner of the request_queue
DM already calls blk_mq_alloc_request on the request_queue of the
underlying device if it is a blk-mq device. But now that we allow drivers
to allocate additional data and initialize it ahead of time we need to do
the same for all drivers. Doing so and using the new cmd_size
infrastructure in the block layer greatly simplifies the dm-rq and mpath
code, and should also make arbitrary combinations of SQ and MQ devices
with SQ or MQ device mapper tables easily possible as a further step.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/md/dm-core.h')
| -rw-r--r-- | drivers/md/dm-core.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/md/dm-core.h b/drivers/md/dm-core.h index 40ceba1fe8be..136fda3ff9e5 100644 --- a/drivers/md/dm-core.h +++ b/drivers/md/dm-core.h @@ -92,7 +92,6 @@ struct mapped_device { * io objects are allocated from here. */ mempool_t *io_pool; - mempool_t *rq_pool; struct bio_set *bs; |