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| author | Ming Lei <ming.lei@redhat.com> | 2019-02-27 20:40:10 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-02-27 06:18:52 -0700 |
| commit | 4d633062c1c0794a6b3836b7b55afba4599736e8 (patch) | |
| tree | 548fd74a24fae2181f63fdde531ff63cc953d6c5 /block | |
| parent | 81214bab582eeda068e7904d57b6a3095e8f3855 (diff) | |
| download | linux-stable-4d633062c1c0794a6b3836b7b55afba4599736e8.tar.gz linux-stable-4d633062c1c0794a6b3836b7b55afba4599736e8.tar.bz2 linux-stable-4d633062c1c0794a6b3836b7b55afba4599736e8.zip | |
block: introduce bvec_nth_page()
Single-page bvec can often be seen in small BS workloads, so
introduce bvec_nth_page() for avoiding to call nth_page() unnecessarily,
which looks not cheap.
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-merge.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/block/blk-merge.c b/block/blk-merge.c index 066b66430523..c7e8a8273460 100644 --- a/block/blk-merge.c +++ b/block/blk-merge.c @@ -483,7 +483,7 @@ static unsigned blk_bvec_map_sg(struct request_queue *q, offset = (total + bvec->bv_offset) % PAGE_SIZE; idx = (total + bvec->bv_offset) / PAGE_SIZE; - pg = nth_page(bvec->bv_page, idx); + pg = bvec_nth_page(bvec->bv_page, idx); sg_set_page(*sg, pg, seg_size, offset); |