From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chetan Loke Subject: [PATCH 1/1] block/nbd: micro-optimization in nbd request completion Date: Wed, 6 Jun 2012 10:15:16 -0400 Message-ID: <1338992116-28094-1-git-send-email-loke.chetan@gmail.com> Cc: netdev@vger.kernel.org, Chetan Loke To: Paul.Clements@steeleye.com, axboe@kernel.dk, linux-kernel@vger.kernel.org Return-path: Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org 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 --- drivers/block/nbd.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c index 061427a..8957b9f 100644 --- a/drivers/block/nbd.c +++ b/drivers/block/nbd.c @@ -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); } -- 1.7.5.2