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author | Jens Axboe <axboe@fb.com> | 2014-11-17 10:41:57 -0700 |
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committer | Jens Axboe <axboe@fb.com> | 2014-11-17 10:41:57 -0700 |
commit | 7c7f2f2bc9a63f9605a16eabac59fc655dfe7c9a (patch) | |
tree | 5d3f60e0b52447eded55ebf8d649e19f0b4f7471 | |
parent | 1a3b595a281a44be4074fe33b317a0a4854b4197 (diff) | |
download | op-kernel-dev-7c7f2f2bc9a63f9605a16eabac59fc655dfe7c9a.zip op-kernel-dev-7c7f2f2bc9a63f9605a16eabac59fc655dfe7c9a.tar.gz |
blk-mq: add blk_mq_free_hctx_request()
It's silly to use blk_mq_free_request() which in turn maps the
request to the hardware queue, for places where we already know
what the hardware queue is. This saves us an extra mapping of a
hardware queue on request completion, if the caller knows this
information already.
Signed-off-by: Jens Axboe <axboe@fb.com>
-rw-r--r-- | block/blk-mq.c | 17 | ||||
-rw-r--r-- | include/linux/blk-mq.h | 1 |
2 files changed, 13 insertions, 5 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index fdf1215..4347aa2 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -269,16 +269,23 @@ static void __blk_mq_free_request(struct blk_mq_hw_ctx *hctx, blk_mq_queue_exit(q); } -void blk_mq_free_request(struct request *rq) +void blk_mq_free_hctx_request(struct blk_mq_hw_ctx *hctx, struct request *rq) { struct blk_mq_ctx *ctx = rq->mq_ctx; - struct blk_mq_hw_ctx *hctx; - struct request_queue *q = rq->q; ctx->rq_completed[rq_is_sync(rq)]++; - - hctx = q->mq_ops->map_queue(q, ctx->cpu); __blk_mq_free_request(hctx, ctx, rq); + +} +EXPORT_SYMBOL_GPL(blk_mq_free_hctx_request); + +void blk_mq_free_request(struct request *rq) +{ + struct blk_mq_hw_ctx *hctx; + struct request_queue *q = rq->q; + + hctx = q->mq_ops->map_queue(q, rq->mq_ctx->cpu); + blk_mq_free_hctx_request(hctx, rq); } EXPORT_SYMBOL_GPL(blk_mq_free_request); diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index c3b64ec..fb0a4fb 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -169,6 +169,7 @@ void blk_mq_flush_plug_list(struct blk_plug *plug, bool from_schedule); void blk_mq_insert_request(struct request *, bool, bool, bool); void blk_mq_run_queues(struct request_queue *q, bool async); void blk_mq_free_request(struct request *rq); +void blk_mq_free_hctx_request(struct blk_mq_hw_ctx *, struct request *rq); bool blk_mq_can_queue(struct blk_mq_hw_ctx *); struct request *blk_mq_alloc_request(struct request_queue *q, int rw, gfp_t gfp, bool reserved); |