From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757198AbXFRDDH (ORCPT ); Sun, 17 Jun 2007 23:03:07 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753625AbXFRDCz (ORCPT ); Sun, 17 Jun 2007 23:02:55 -0400 Received: from pentafluge.infradead.org ([213.146.154.40]:41966 "EHLO pentafluge.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752294AbXFRDCy (ORCPT ); Sun, 17 Jun 2007 23:02:54 -0400 Subject: Re: [patch 00/14] Page cache cleanup in anticipation of Large Blocksize support From: Arjan van de Ven To: Christoph Lameter Cc: Matt Mackall , Andrew Morton , linux-kernel@vger.kernel.org, hch@infradead.org In-Reply-To: References: <20070614193839.878721298@sgi.com> <20070614130645.cabdff1b.akpm@linux-foundation.org> <20070614143248.736312f8.akpm@linux-foundation.org> <1182043500.2743.7.camel@laptopd505.fenrus.org> <20070617050255.GM11166@waste.org> Content-Type: text/plain Organization: Intel International BV Date: Sun, 17 Jun 2007 20:00:02 -0700 Message-Id: <1182135603.22999.15.camel@laptopd505.fenrus.org> Mime-Version: 1.0 X-Mailer: Evolution 2.10.2 (2.10.2-2.fc7) Content-Transfer-Encoding: 7bit X-SRS-Rewrite: SMTP reverse-path rewritten from by pentafluge.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sun, 2007-06-17 at 19:08 -0700, Christoph Lameter wrote: > On Sun, 17 Jun 2007, Matt Mackall wrote: > > > Is it? Last I looked it had reverted to handing out reverse-contiguous > > pages. > > I thought that was fixed? Bill Irwin was working on it. > > But the contiguous pages usually only work shortly after boot. After > awhile memory gets sufficiently scrambled that the coalescing in the I/O > layer becomes ineffective. the buddy allocator at least defragments itself somewhat (granted, it's not perfect and the per cpu page queues spoil the game too...) -- if you want to mail me at work (you don't), use arjan (at) linux.intel.com Test the interaction between Linux and your BIOS via http://www.linuxfirmwarekit.org