Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761318AbYGRROr (ORCPT ); Fri, 18 Jul 2008 13:14:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756234AbYGRROi (ORCPT ); Fri, 18 Jul 2008 13:14:38 -0400 Received: from smtp1.linux-foundation.org ([140.211.169.13]:34723 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756198AbYGRROi (ORCPT ); Fri, 18 Jul 2008 13:14:38 -0400 Message-ID: <4880CF52.5020406@linux-foundation.org> Date: Fri, 18 Jul 2008 12:13:54 -0500 From: Christoph Lameter User-Agent: Thunderbird 2.0.0.14 (Windows/20080421) MIME-Version: 1.0 To: Richard Kennedy CC: penberg@cs.helsinki.fi, mpm@selenic.com, linux-mm , lkml , Mel Gorman Subject: Re: [PATCH][RFC] slub: increasing order reduces memory usage of some key caches References: <1216211371.3122.46.camel@castor.localdomain> <487DF5D4.9070101@linux-foundation.org> <1216216730.3122.60.camel@castor.localdomain> <487DFFBE.5050407@linux-foundation.org> <1216375025.3082.7.camel@castor.localdomain> <4880A694.1000100@linux-foundation.org> <1216392177.3082.27.camel@castor.localdomain> <4880AEFE.3060909@linux-foundation.org> <1216394560.3082.32.camel@castor.localdomain> In-Reply-To: <1216394560.3082.32.camel@castor.localdomain> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 716 Lines: 18 Richard Kennedy wrote: > On Fri, 2008-07-18 at 09:55 -0500, Christoph Lameter wrote: >> OK that is now 4215 pages before and 4112 after the patch? Yawn.... So barely any effect? > > Well it's not huge but there's another 100+ pages out of radix_tree, > too. & I've not inspected the rest of the cache usage. Can you post these numbers with the slabinfo for the radix tree as well? It may be that there are a lot of sparsely populated slab pages that waste memory. -- 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/