Messages in this thread Patch in this message | | | From | Ming Lei <> | Subject | [PATCH v2 4/7] blk-mq: check bio_mergeable() early before merging | Date | Tue, 20 Oct 2015 23:13:54 +0800 |
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It isn't necessary to try to merge the bio which is marked as NOMERGE.
Reviewed-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Ming Lei <ming.lei@canonical.com> --- block/blk-mq.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block/blk-mq.c b/block/blk-mq.c index 1796b31..edbc877 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -1140,7 +1140,7 @@ static inline bool blk_mq_merge_queue_io(struct blk_mq_hw_ctx *hctx, struct blk_mq_ctx *ctx, struct request *rq, struct bio *bio) { - if (!hctx_allow_merges(hctx)) { + if (!hctx_allow_merges(hctx) || !bio_mergeable(bio)) { blk_mq_bio_to_request(rq, bio); spin_lock(&ctx->lock); insert_rq: -- 1.9.1
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