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>
This commit is contained in:
parent
4a0efdc933
commit
11dfce509e
|
@ -2926,7 +2926,7 @@ int blk_rq_prep_clone(struct request *rq, struct request *rq_src,
|
||||||
blk_rq_init(NULL, rq);
|
blk_rq_init(NULL, rq);
|
||||||
|
|
||||||
__rq_for_each_bio(bio_src, rq_src) {
|
__rq_for_each_bio(bio_src, rq_src) {
|
||||||
bio = bio_clone_bioset(bio_src, gfp_mask, bs);
|
bio = bio_clone_fast(bio_src, gfp_mask, bs);
|
||||||
if (!bio)
|
if (!bio)
|
||||||
goto free_and_out;
|
goto free_and_out;
|
||||||
|
|
||||||
|
|
Loading…
Reference in New Issue