From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ming Lei Subject: [PATCH V5 7/8] blk-mq-sched: refactor blk_mq_sched_try_merge() Date: Sat, 30 Sep 2017 19:26:54 +0800 Message-ID: <20170930112655.31451-8-ming.lei@redhat.com> References: <20170930112655.31451-1-ming.lei@redhat.com> Return-path: In-Reply-To: <20170930112655.31451-1-ming.lei@redhat.com> Sender: linux-kernel-owner@vger.kernel.org To: Jens Axboe , linux-block@vger.kernel.org, Christoph Hellwig , Mike Snitzer , dm-devel@redhat.com Cc: Bart Van Assche , Laurence Oberman , Paolo Valente , Oleksandr Natalenko , Tom Nguyen , linux-kernel@vger.kernel.org, Omar Sandoval , Ming Lei List-Id: dm-devel.ids This patch introduces one function __blk_mq_try_merge() which will be resued for bio merge to sw queue in the following patch. No functional change. Tested-by: Oleksandr Natalenko Tested-by: Tom Nguyen Tested-by: Paolo Valente Reviewed-by: Bart Van Assche Signed-off-by: Ming Lei --- block/blk-mq-sched.c | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) diff --git a/block/blk-mq-sched.c b/block/blk-mq-sched.c index 8c09959bc0d0..a58f4746317c 100644 --- a/block/blk-mq-sched.c +++ b/block/blk-mq-sched.c @@ -222,12 +222,11 @@ void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx) } } -bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio, - struct request **merged_request) +static bool __blk_mq_try_merge(struct request_queue *q, + struct bio *bio, struct request **merged_request, + struct request *rq, enum elv_merge type) { - struct request *rq; - - switch (elv_merge(q, &rq, bio)) { + switch (type) { case ELEVATOR_BACK_MERGE: if (!blk_mq_sched_allow_merge(q, rq, bio)) return false; @@ -250,6 +249,15 @@ bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio, return false; } } + +bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio, + struct request **merged_request) +{ + struct request *rq; + enum elv_merge type = elv_merge(q, &rq, bio); + + return __blk_mq_try_merge(q, bio, merged_request, rq, type); +} EXPORT_SYMBOL_GPL(blk_mq_sched_try_merge); /* -- 2.9.5