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@xxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
Signed-off-by: Ming Lei <ming.lei@xxxxxxxxxx>
---
block/blk-merge.c | 17 -----------------
1 file changed, 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;
--
2.9.5
