diff options
| author | Ming Lei <ming.lei@redhat.com> | 2019-03-17 18:01:05 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-04-01 12:11:21 -0600 |
| commit | fd7d8d4232f08b0df623d9ea7e941f0350a26e14 (patch) | |
| tree | 859fc1781425f2abeb39447c77081e73c99b37a6 | |
| parent | db5ebd6edd2627d7e81a031643cf43587f63e66c (diff) | |
| download | linux-fd7d8d4232f08b0df623d9ea7e941f0350a26e14.tar.bz2 | |
block: don't merge adjacent bvecs to one segment in bio blk_queue_split
For normal filesystem IO, each page is added via blk_add_page(),
in which bvec(page) merge has been handled already, and basically
not possible to merge two adjacent bvecs in one bio.
So not try to merge two adjacent bvecs in blk_queue_split().
Cc: Omar Sandoval <osandov@fb.com>
Cc: Christoph Hellwig <hch@lst.de>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | block/blk-merge.c | 17 |
1 files changed, 0 insertions, 17 deletions
diff --git a/block/blk-merge.c b/block/blk-merge.c index 1c9d4f0f96ea..aa9164eb7187 100644 --- a/block/blk-merge.c +++ b/block/blk-merge.c @@ -267,23 +267,6 @@ static struct bio *blk_bio_segment_split(struct request_queue *q, goto split; } - if (bvprvp) { - if (seg_size + bv.bv_len > queue_max_segment_size(q)) - goto new_segment; - if (!biovec_phys_mergeable(q, bvprvp, &bv)) - goto new_segment; - - seg_size += bv.bv_len; - bvprv = bv; - bvprvp = &bvprv; - sectors += bv.bv_len >> 9; - - if (nsegs == 1 && seg_size > front_seg_size) - front_seg_size = seg_size; - - continue; - } -new_segment: if (nsegs == max_segs) goto split; |