Commit 01ff5dbc authored Jul 31, 2012 by Chetan Loke Committed by Jens Axboe Jul 31, 2012

block/nbd: micro-optimization in nbd request completion



Add in-flight cmds to the tail. That way while searching
(during request completion),we will always get a hit on the
first element.

Signed-off-by: Chetan Loke <loke.chetan@gmail.com>
Acked-by:  <Paul.Clements@steeleye.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

parent 72ea1f74

drivers/block/nbd.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -481,7 +481,7 @@ static void nbd_handle_req(struct nbd_device nbd, struct request req)
		nbd_end_request(req);
		} else {
		spin_lock(&nbd->queue_lock);
		list_add(&req->queuelist, &nbd->queue_head);
		list_add_tail(&req->queuelist, &nbd->queue_head);
		spin_unlock(&nbd->queue_lock);
		}