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authorKeith Busch <keith.busch@intel.com>2015-12-22 15:48:44 -0700
committerJens Axboe <axboe@fb.com>2015-12-22 17:19:25 -0700
commitd3805611130af9b911e908af9f67a3f64f4f0914 (patch)
treedd55bd6363e04a32ca4e39661cd097cdb4fa7eff /block
parent24bc3ea5df2e1d89e9d50ecca57c210b87ad61d2 (diff)
downloadlinux-sh-d3805611130af9b911e908af9f67a3f64f4f0914.tar.gz
block: Split bios on chunk boundaries
For h/w that advertise their block storage's underlying chunk size, it's a big performance win to not submit commands that cross them. This patch uses that criteria if it is provided. If it is not provided, this patch uses the max sectors as before. Signed-off-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block')
-rw-r--r--block/blk-merge.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/block/blk-merge.c b/block/blk-merge.c
index e01405a3e8b3..e73846a3d08a 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -81,7 +81,7 @@ static struct bio *blk_bio_segment_split(struct request_queue *q,
struct bio *new = NULL;
bio_for_each_segment(bv, bio, iter) {
- if (sectors + (bv.bv_len >> 9) > queue_max_sectors(q))
+ if (sectors + (bv.bv_len >> 9) > blk_max_size_offset(q, bio->bi_iter.bi_sector))
goto split;
/*