Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757172AbZCZRZ2 (ORCPT ); Thu, 26 Mar 2009 13:25:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753856AbZCZRZT (ORCPT ); Thu, 26 Mar 2009 13:25:19 -0400 Received: from smtp1.linux-foundation.org ([140.211.169.13]:41439 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752532AbZCZRZS (ORCPT ); Thu, 26 Mar 2009 13:25:18 -0400 Date: Thu, 26 Mar 2009 10:16:25 -0700 (PDT) From: Linus Torvalds X-X-Sender: torvalds@localhost.localdomain To: Theodore Tso cc: Ingo Molnar , Jan Kara , Andrew Morton , Alan Cox , Arjan van de Ven , Peter Zijlstra , Nick Piggin , Jens Axboe , David Rees , Jesper Krogh , Linux Kernel Mailing List , Oleg Nesterov , Roland McGrath Subject: Re: ext3 IO latency measurements (was: Linux 2.6.29) In-Reply-To: <20090326170714.GF6239@mit.edu> Message-ID: References: <20090325185824.GO32307@mit.edu> <20090325215137.GQ32307@mit.edu> <20090325235041.GA11024@duck.suse.cz> <20090326090630.GA9369@elte.hu> <20090326113705.GV32307@mit.edu> <20090326140312.GB14822@elte.hu> <20090326144707.GA6239@mit.edu> <20090326170714.GF6239@mit.edu> User-Agent: Alpine 2.00 (LFD 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1136 Lines: 30 On Thu, 26 Mar 2009, Theodore Tso wrote: > > You can, actually, but it requires hacking /boot/grub/menu.list. The > boot command option "rootflags=noatime" should do it, if their initrd > scripts are at all sane (and they honor rootfstype, so they probably > do also honor rootflags). Not when I tried it. It just causes the initrd to be mounted noatime, and then the real root filesystem gets mounted atime again. Maybe I screwed up. But I don't think so. > The question is whether we can make Fedora 11 and OpenSUSE do the > right thing now that this has become a highly visible discussion. I'm > actually fairly optimistic on this front. (Maybe some distro folks > will care to chime in on whether upcoming releases of F11 and OpenSuSE > can be changed to DTRT?) And what's the argument for not doing it in the kernel? The fact is, "atime" by default is just wrong. Linus -- 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/