Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932139AbVLNIkh (ORCPT ); Wed, 14 Dec 2005 03:40:37 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932143AbVLNIkh (ORCPT ); Wed, 14 Dec 2005 03:40:37 -0500 Received: from omx3-ext.sgi.com ([192.48.171.25]:20694 "EHLO omx3.sgi.com") by vger.kernel.org with ESMTP id S932139AbVLNIkg (ORCPT ); Wed, 14 Dec 2005 03:40:36 -0500 Date: Wed, 14 Dec 2005 00:40:14 -0800 From: Paul Jackson To: Eric Dumazet Cc: clameter@engr.sgi.com, akpm@osdl.org, linux-kernel@vger.kernel.org, nickpiggin@yahoo.com.au, Simon.Derr@bull.net, ak@suse.de Subject: Re: [PATCH] Cpuset: rcu optimization of page alloc hook Message-Id: <20051214004014.ada450e6.pj@sgi.com> In-Reply-To: <439FD295.7070102@cosmosbay.com> References: <20051211233130.18000.2748.sendpatchset@jackhammer.engr.sgi.com> <439D39A8.1020806@cosmosbay.com> <20051212020211.1394bc17.pj@sgi.com> <20051212021247.388385da.akpm@osdl.org> <20051213075345.c39f335d.pj@sgi.com> <439EF75D.50206@cosmosbay.com> <439F0B43.4080500@cosmosbay.com> <20051213130350.464a3054.pj@sgi.com> <439F3F6E.6010701@cosmosbay.com> <20051213142346.ccd3081a.pj@sgi.com> <439FD295.7070102@cosmosbay.com> Organization: SGI X-Mailer: Sylpheed version 2.1.7 (GTK+ 2.4.9; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 672 Lines: 21 Eric wrote: > So for small objects (<= 256 bytes), you end with a sizeof(arracy_cache) = > 1024 bytes per cpu A kbyte per cpu, for something 98% of systems will use -none- of. Ouch. All the more motivation for nuking cpuset_cache. Patch coming in a minute. -- I won't rest till it's the best ... Programmer, Linux Scalability Paul Jackson 1.925.600.0401 - 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/