From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753333AbXDISKK (ORCPT ); Mon, 9 Apr 2007 14:10:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753334AbXDISKJ (ORCPT ); Mon, 9 Apr 2007 14:10:09 -0400 Received: from mga09.intel.com ([134.134.136.24]:13326 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752773AbXDISKI (ORCPT ); Mon, 9 Apr 2007 14:10:08 -0400 X-ExtLoop1: 1 X-IronPort-AV: i="4.14,388,1170662400"; d="scan'208"; a="70846712:sNHT22234320" Date: Mon, 9 Apr 2007 11:08:53 -0700 From: "Siddha, Suresh B" To: akpm@linux-foundation.org Cc: mingo@elte.hu, nickpiggin@yahoo.com.au, linux-kernel@vger.kernel.org, suresh.b.siddha@intel.com Subject: [patch] sched: align rq to cacheline boundary Message-ID: <20070409180853.GC3948@linux-os.sc.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Align the per cpu runqueue to the cacheline boundary. This will minimize the number of cachelines touched during remote wakeup. Signed-off-by: Suresh Siddha --- diff --git a/kernel/sched.c b/kernel/sched.c index b9a6837..eca33c5 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -278,7 +278,7 @@ struct rq { struct lock_class_key rq_lock_key; }; -static DEFINE_PER_CPU(struct rq, runqueues); +static DEFINE_PER_CPU(struct rq, runqueues) ____cacheline_aligned_in_smp; static inline int cpu_of(struct rq *rq) {