Messages in this thread Patch in this message | | | From | Ming Lei <> | Subject | [PATCH] blk-merge: fix computing bio->bi_seg_front_size in case of single segment | Date | Mon, 30 Nov 2015 16:05:49 +0800 |
| |
When bio has only one physical segment, we should set bio's bi_seg_front_size as the real(final) size of the single segment.
Fixes: 02e707424c2ea(blk-merge: fix blk_bio_segment_split) Reported-by: Markus Trippelsdorf <markus@trippelsdorf.de> Tested-by: Markus Trippelsdorf <markus@trippelsdorf.de> Signed-off-by: Ming Lei <ming.lei@canonical.com> --- block/blk-merge.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/block/blk-merge.c b/block/blk-merge.c index 41a55ba..e01405a 100644 --- a/block/blk-merge.c +++ b/block/blk-merge.c @@ -103,6 +103,9 @@ static struct bio *blk_bio_segment_split(struct request_queue *q, 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: -- 1.9.1
| |