Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935763AbZDJNIP (ORCPT ); Fri, 10 Apr 2009 09:08:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757139AbZDJNHz (ORCPT ); Fri, 10 Apr 2009 09:07:55 -0400 Received: from mx3.mail.elte.hu ([157.181.1.138]:53339 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756390AbZDJNHy (ORCPT ); Fri, 10 Apr 2009 09:07:54 -0400 Date: Fri, 10 Apr 2009 15:07:35 +0200 From: Ingo Molnar To: Bron Gondwana Cc: Andi Kleen , Linus Torvalds , Frederic Weisbecker , LKML , Jeff Mahoney , Peter Zijlstra , ReiserFS Development List , Andrew Morton , Alexander Viro Subject: Re: [PATCH] reiserfs: kill-the-BKL Message-ID: <20090410130735.GC31307@elte.hu> References: <1239070789-13354-1-git-send-email-fweisbec@gmail.com> <87tz4x97uq.fsf@basil.nowhere.org> <20090409184022.GA2665@elte.hu> <20090409193635.GO14687@one.firstfloor.org> <20090409211733.GA23233@elte.hu> <20090410003947.GA21681@brong.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090410003947.GA21681@brong.net> 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: 1095 Lines: 29 * Bron Gondwana wrote: > > For example, if you have /home and / on separate reiser3 > > filesystems, you could see as much as a 200% jump in performance > > straight away on certain workloads, on a dual-core box. > > > > That big BKL overhead is a real reiser3 scalability problem - > > especially on reiser3 using servers which are likely to have > > several filesystems on the same box. > > Yes - I'm certainly interested in that. > > That said, we have a box with 83 reiserfs partitions on it, and > which is constrained by IO (main servers really don't need much > CPU). Performance is pretty good even now. > > So - I'm interested in this patch series, but not at the expense > of making reiserfs any less stable. Our customers, funnily > enough, like it when our service is stable! Definitely so :-) 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/