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authorJens Axboe <axboe@fb.com>2016-01-08 09:00:29 -0700
committerJens Axboe <axboe@fb.com>2016-01-08 09:00:29 -0700
commit6126eb2483a8398329e662eaff5f103e832ed5cb (patch)
treeab2490784ee923ff6b702e80143382489191ddb9
parent02006f7a7a715af10974a30b7ad8e6ee340f954c (diff)
downloadleg-kernel-6126eb2483a8398329e662eaff5f103e832ed5cb.tar.gz
Revert "block: Split bios on chunk boundaries"
This reverts commit d3805611130af9b911e908af9f67a3f64f4f0914. If we end up splitting on the first segment, we don't adjust the sector count. That results in hitting a BUG() with attempting to split 0 sectors. As this is just a performance issue and not a regression since 4.3 release, let's just rever this change. That gives us more time to test a real fix for 4.5, which would be marked for stable anyway.
-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 e73846a3d08a..e01405a3e8b3 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) > blk_max_size_offset(q, bio->bi_iter.bi_sector))
+ if (sectors + (bv.bv_len >> 9) > queue_max_sectors(q))
goto split;
/*