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Revert "block: Split bios on chunk boundaries" 

This reverts commit d380561113.

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.
This commit is contained in:
Jens Axboe 2016-01-08 09:00:29 -07:00
parent 02006f7a7a
commit 6126eb2483
1 changed files with 1 additions and 1 deletions
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block/blk-merge.c
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@ -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;
/*