Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932160AbZDAQeg (ORCPT ); Wed, 1 Apr 2009 12:34:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1764755AbZDAQeX (ORCPT ); Wed, 1 Apr 2009 12:34:23 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:48730 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1764126AbZDAQeW (ORCPT ); Wed, 1 Apr 2009 12:34:22 -0400 Date: Wed, 1 Apr 2009 18:34:07 +0200 From: Ingo Molnar To: Jeff Mahoney Cc: Linus Torvalds , =?iso-8859-1?Q?Fr=E9d=E9ric?= Weisbecker , Peter Zijlstra , Linux Kernel Mailing List , Andrew Morton , ReiserFS Development List Subject: Re: [patch 00/35] Jeff's ReiserFS Patch Queue Message-ID: <20090401163407.GE22517@elte.hu> References: <20090330180215.951354436@suse.com> <20090401161657.GA13802@elte.hu> <49D39642.9070606@suse.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <49D39642.9070606@suse.com> User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1534 Lines: 40 * Jeff Mahoney wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Ingo Molnar wrote: > > * Linus Torvalds wrote: > > > >>> Once this is applied, I expect reiserfs to be in deep > >>> maintenance-only mode. > >> Heh, I hadn't expected even this. > > > > Note, there are BKL-removal patches in the works by Fr?d?ric > > Weisbecker, for the tip:kill-the-BKL topic branch. > > > > Reiser3 is the heaviest (and most non-trivial) BKL user amongst all > > the filesystems, its BKL use is recursive and it frequently relies > > on the implicit dropping of the BKL at various blocking points both > > for correctness and for performance reasons. > > > > There might be something worth posting+reviewing soon. > > Oh interesting. I'm glad someone is working on this. I've started > to several times and decided to focus my efforts on things outside > of reiserfs instead. The reiserfs usage of the BKL has always been > a black mark. I'll let Frederic describe it but AFAIK the patch is working fine with the BKL as a mutex and no lockdep complaints or lockups. The main focus is now on finding the performance affecting spots, because Frederic's main desktop is on reiserfs and he does not accept a slowdown :) Ingo -- 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/