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| author | Junichi Nomura <j-nomura@ce.jp.nec.com> | 2014-10-03 23:27:11 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2014-10-03 23:28:16 +0200 |
| commit | 11dfce509eaa35e8fc81cb50d0910c0e235fd7e2 (patch) | |
| tree | ad67b4e5266cf3cd9efdc12e3929f9c95f0b82ff /block/blk-mq.h | |
| parent | block: misplaced rq_complete tracepoint (diff) | |
| download | linux-11dfce509eaa35e8fc81cb50d0910c0e235fd7e2.tar.xz linux-11dfce509eaa35e8fc81cb50d0910c0e235fd7e2.zip | |
block: use bio_clone_fast() in blk_rq_prep_clone()
Request cloning clones bios in the request to track the completion
of each bio.
For that purpose, we can use bio_clone_fast() instead of bio_clone()
to avoid unnecessary allocation and copy of bvecs.
This patch reduces memory footprint of request-based device-mapper
(about 1-4KB for each request) and is a preparation for further
reduction of memory usage by removing unused bvec mempool.
Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-mq.h')
0 files changed, 0 insertions, 0 deletions