Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755900Ab2FFOPm (ORCPT ); Wed, 6 Jun 2012 10:15:42 -0400 Received: from mail-qc0-f174.google.com ([209.85.216.174]:33760 "EHLO mail-qc0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755212Ab2FFOPl (ORCPT ); Wed, 6 Jun 2012 10:15:41 -0400 From: Chetan Loke To: Paul.Clements@steeleye.com, axboe@kernel.dk, linux-kernel@vger.kernel.org Cc: netdev@vger.kernel.org, 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> X-Mailer: git-send-email 1.7.5.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 967 Lines: 30 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/