Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756834AbYLaXFE (ORCPT ); Wed, 31 Dec 2008 18:05:04 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751899AbYLaXEv (ORCPT ); Wed, 31 Dec 2008 18:04:51 -0500 Received: from nlpi053.sbcis.sbc.com ([207.115.36.82]:44281 "EHLO nlpi053.prodigy.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751895AbYLaXEu (ORCPT ); Wed, 31 Dec 2008 18:04:50 -0500 Date: Wed, 31 Dec 2008 17:04:04 -0600 (CST) From: Christoph Lameter X-X-Sender: cl@quilx.com To: Pekka Enberg cc: Andrew Morton , jens.axboe@oracle.com, kmannth@us.ibm.com, linux-kernel@vger.kernel.org, sekharan@us.ibm.com, Miklos Szeredi , Dave Chinner , linux-fsdevel@vger.kernel.org Subject: Defrag support for inodes / dentries etc In-Reply-To: <84144f020812301208i34e5cc73hac25675f56e6aac0@mail.gmail.com> Message-ID: References: <1227561983.6487.32.camel@keith-laptop> <20081125091917.GU26308@kernel.dk> <20081230113514.fe09d495.akpm@linux-foundation.org> <20081230114138.cd9e9763.akpm@linux-foundation.org> <84144f020812301208i34e5cc73hac25675f56e6aac0@mail.gmail.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Spam-Score: -2.6 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1348 Lines: 32 On Tue, 30 Dec 2008, Pekka Enberg wrote: > > I'll need to revert to yesterday's linux-next I think. Pekka, has > > that stuff been dropped? > > Yup, there hasn't been any activity after the last merge window so I'm > not expecting to be able to merge it for 2.6.29. As per linux-next > rules, I dropped the 2.6.30 material until the merge window closes. > The code is in topic/slub-defrag of slab.git, though. Well the problem currently is that there is no driver for these features. There has been a request for this functionality for a long time but both the primary drivers for this (Dave Chinner and I) are no longer with the company for which we started the project. I'd be glad to continue this if there would be an interest by the filesystem developers. The key problem that would have to be addressed to move this forward is to clean up the callbacks for dentries and inodes. Again the problem solved by these patches are mainly filesystem intensive loads that can cause significant fragmentation for inodes and denties which may leave lots of memory unrecoverable for other purposes. -- 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/