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authorJens Axboe <axboe@fb.com>2014-11-17 10:41:57 -0700
committerJens Axboe <axboe@fb.com>2014-11-17 10:41:57 -0700
commit7c7f2f2bc9a63f9605a16eabac59fc655dfe7c9a (patch)
tree5d3f60e0b52447eded55ebf8d649e19f0b4f7471 /block
parent1a3b595a281a44be4074fe33b317a0a4854b4197 (diff)
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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>
Diffstat (limited to 'block')
-rw-r--r--block/blk-mq.c17
1 files changed, 12 insertions, 5 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c
index fdf12152946e..4347aa2be6ae 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);