Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758365AbZDAXia (ORCPT ); Wed, 1 Apr 2009 19:38:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752806AbZDAXiQ (ORCPT ); Wed, 1 Apr 2009 19:38:16 -0400 Received: from out1.smtp.messagingengine.com ([66.111.4.25]:35045 "EHLO out1.smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752207AbZDAXiQ (ORCPT ); Wed, 1 Apr 2009 19:38:16 -0400 Date: Thu, 2 Apr 2009 09:18:50 +1100 From: Bron Gondwana To: Frederic Weisbecker Cc: Ingo Molnar , Jeff Mahoney , Linus Torvalds , Peter Zijlstra , Linux Kernel Mailing List , Andrew Morton , ReiserFS Development List Subject: Re: [patch 00/35] Jeff's ReiserFS Patch Queue Message-ID: <20090401221850.GB6776@brong.net> References: <20090330180215.951354436@suse.com> <20090401161657.GA13802@elte.hu> <49D39642.9070606@suse.com> <20090401163407.GE22517@elte.hu> <20090401165134.GA5924@nowhere> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090401165134.GA5924@nowhere> Organization: brong.net User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1368 Lines: 36 On Wed, Apr 01, 2009 at 06:51:36PM +0200, Frederic Weisbecker wrote: > > 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 :) > > Hehe :-) > No actually I would accept a tiny slowdown but I fear that the common > reiserfs users wouldn't. We run big(ish) imap servers with up to 80 reiserfs partitions spread over a bunch of SCSI or SAS attached external drive units. I'm actually surprised that the BKL isn't causing us much pain (load is amazingly low considering how many users are on these boxes - at least now that we have 32Gb RAM and 64 bit kernels). Are you still using an "entire reiserfs subsystem" mutex, or per-filesystem locking? If it's per filesystem, then I suspect we'll be big fans! > I'm still working on this and once it's ready enough for an RFC patch, > I'll explain how is done the conversion to a mutex. > > Stay tuned. Sure will! Thanks, Bron. -- 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/