Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763889AbYCGEFy (ORCPT ); Thu, 6 Mar 2008 23:05:54 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755906AbYCGEFm (ORCPT ); Thu, 6 Mar 2008 23:05:42 -0500 Received: from mail.suse.de ([195.135.220.2]:34902 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755409AbYCGEFm (ORCPT ); Thu, 6 Mar 2008 23:05:42 -0500 Date: Fri, 7 Mar 2008 05:05:40 +0100 From: Nick Piggin To: Christoph Lameter Cc: David Miller , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, yanmin_zhang@linux.intel.com, dada1@cosmosbay.com Subject: Re: [rfc][patch 1/3] slub: fix small HWCACHE_ALIGN alignment Message-ID: <20080307040540.GH21185@wotan.suse.de> References: <20080306025758.GB27150@wotan.suse.de> <20080307022355.GB21185@wotan.suse.de> <20080307023223.GD21185@wotan.suse.de> <20080307031044.GF21185@wotan.suse.de> <20080307032251.GG21185@wotan.suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.9i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 696 Lines: 18 On Thu, Mar 06, 2008 at 07:58:06PM -0800, Christoph Lameter wrote: > On Fri, 7 Mar 2008, Nick Piggin wrote: > > > Where do I argue that it reduces cacheline contention? All arguments > > I made apply to a UP system equally. > > Huh? I thought you wanted to avoid cacheline alignment on UP to save > memory? We're talking about HWCACHE_ALIGN in this thread. SMP_ALIGN is for reducing cacheline contention and that's where you can avoid it on UP. -- 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/