diff options
Diffstat (limited to 'block/blk-merge.c')
| -rw-r--r-- | block/blk-merge.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/block/blk-merge.c b/block/blk-merge.c index 89b97b5e0881..9476b1528ded 100644 --- a/block/blk-merge.c +++ b/block/blk-merge.c @@ -385,6 +385,14 @@ static bool req_no_special_merge(struct request *req) return !q->mq_ops && req->special; } +static int req_gap_to_prev(struct request *req, struct request *next) +{ + struct bio *prev = req->biotail; + + return bvec_gap_to_prev(&prev->bi_io_vec[prev->bi_vcnt - 1], + next->bio->bi_io_vec[0].bv_offset); +} + static int ll_merge_requests_fn(struct request_queue *q, struct request *req, struct request *next) { @@ -399,6 +407,10 @@ static int ll_merge_requests_fn(struct request_queue *q, struct request *req, if (req_no_special_merge(req) || req_no_special_merge(next)) return 0; + if (test_bit(QUEUE_FLAG_SG_GAPS, &q->queue_flags) && + req_gap_to_prev(req, next)) + return 0; + /* * Will it become too large? */ |