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author | Bart Van Assche <bart.vanassche@sandisk.com> | 2016-10-28 17:20:02 -0700 |
---|---|---|
committer | Jens Axboe <axboe@fb.com> | 2016-11-02 12:50:19 -0600 |
commit | 2253efc850c4cf690516bbc07854eeb1077202ba (patch) | |
tree | 8e99571c3ce4bff1ca732820a55d0abea1824b41 /block | |
parent | fd00144301d64f1742541a3c5e64cd1c51f39c55 (diff) | |
download | op-kernel-dev-2253efc850c4cf690516bbc07854eeb1077202ba.zip op-kernel-dev-2253efc850c4cf690516bbc07854eeb1077202ba.tar.gz |
blk-mq: Move more code into blk_mq_direct_issue_request()
Move the "hctx stopped" test and the insert request calls into
blk_mq_direct_issue_request(). Rename that function into
blk_mq_try_issue_directly() to reflect its new semantics. Pass
the hctx pointer to that function instead of looking it up a
second time. These changes avoid that code has to be duplicated
in the next patch.
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block')
-rw-r--r-- | block/blk-mq.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index 28bf667..447c37f 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -1228,11 +1228,11 @@ static struct request *blk_mq_map_request(struct request_queue *q, return rq; } -static int blk_mq_direct_issue_request(struct request *rq, blk_qc_t *cookie) +static void blk_mq_try_issue_directly(struct blk_mq_hw_ctx *hctx, + struct request *rq, blk_qc_t *cookie) { int ret; struct request_queue *q = rq->q; - struct blk_mq_hw_ctx *hctx = blk_mq_map_queue(q, rq->mq_ctx->cpu); struct blk_mq_queue_data bd = { .rq = rq, .list = NULL, @@ -1240,6 +1240,9 @@ static int blk_mq_direct_issue_request(struct request *rq, blk_qc_t *cookie) }; blk_qc_t new_cookie = blk_tag_to_qc_t(rq->tag, hctx->queue_num); + if (blk_mq_hctx_stopped(hctx)) + goto insert; + /* * For OK queue, we are done. For error, kill it. Any other * error (busy), just add it to our list as we previously @@ -1248,7 +1251,7 @@ static int blk_mq_direct_issue_request(struct request *rq, blk_qc_t *cookie) ret = q->mq_ops->queue_rq(hctx, &bd); if (ret == BLK_MQ_RQ_QUEUE_OK) { *cookie = new_cookie; - return 0; + return; } __blk_mq_requeue_request(rq); @@ -1257,10 +1260,11 @@ static int blk_mq_direct_issue_request(struct request *rq, blk_qc_t *cookie) *cookie = BLK_QC_T_NONE; rq->errors = -EIO; blk_mq_end_request(rq, rq->errors); - return 0; + return; } - return -1; +insert: + blk_mq_insert_request(rq, false, true, true); } /* @@ -1337,9 +1341,7 @@ static blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio) blk_mq_put_ctx(data.ctx); if (!old_rq) goto done; - if (blk_mq_hctx_stopped(data.hctx) || - blk_mq_direct_issue_request(old_rq, &cookie) != 0) - blk_mq_insert_request(old_rq, false, true, true); + blk_mq_try_issue_directly(data.hctx, old_rq, &cookie); goto done; } |