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>
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 @@
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;
+
+ ctx->rq_completed[rq_is_sync(rq)]++;
+ __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;
- ctx->rq_completed[rq_is_sync(rq)]++;
-
- hctx = q->mq_ops->map_queue(q, ctx->cpu);
- __blk_mq_free_request(hctx, ctx, rq);
+ 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);