Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S937710AbXHIHFb (ORCPT ); Thu, 9 Aug 2007 03:05:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755635AbXHIHFX (ORCPT ); Thu, 9 Aug 2007 03:05:23 -0400 Received: from 5.xs4all.nl ([82.95.233.223]:34905 "EHLO capsaicin.mamane.lu" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754133AbXHIHFV (ORCPT ); Thu, 9 Aug 2007 03:05:21 -0400 X-Greylist: delayed 2401 seconds by postgrey-1.27 at vger.kernel.org; Thu, 09 Aug 2007 03:05:21 EDT Date: Thu, 9 Aug 2007 08:25:11 +0200 From: Lionel Elie Mamane To: Ingo Molnar Cc: Linus Torvalds , Peter Zijlstra , linux-mm@kvack.org, linux-kernel@vger.kernel.org, miklos@szeredi.hu, akpm@linux-foundation.org, neilb@suse.de, dgc@sgi.com, tomoki.sekiyama.qu@hitachi.com, nikita@clusterfs.com, trond.myklebust@fys.uio.no, yingcha@pimp.vs19.net Subject: Re: [PATCH 00/23] per device dirty throttling -v8 Message-ID: <20070809062511.GA23435@capsaicin.mamane.lu> Mail-Followup-To: Lionel Elie Mamane , Ingo Molnar , Linus Torvalds , Peter Zijlstra , linux-mm@kvack.org, linux-kernel@vger.kernel.org, miklos@szeredi.hu, akpm@linux-foundation.org, neilb@suse.de, dgc@sgi.com, tomoki.sekiyama.qu@hitachi.com, nikita@clusterfs.com, trond.myklebust@fys.uio.no, yingcha@pimp.vs19.net References: <20070803123712.987126000@chello.nl> <20070804063217.GA25069@elte.hu> <20070804070737.GA940@elte.hu> <20070804103347.GA1956@elte.hu> <20070804163733.GA31001@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070804163733.GA31001@elte.hu> X-Operating-System: GNU/Linux X-Request-PGP: http://www.mamane.lu/openpgp/rsa_v4_4096.asc User-Agent: Mutt/1.5.13 (2006-08-11) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1386 Lines: 30 On Sat, Aug 04, 2007 at 06:37:33PM +0200, Ingo Molnar wrote: > * Linus Torvalds wrote: >> The fact is, ext3 *sucks* at fsync. I hate hate hate it. It's >> totally unusable, imnsho. > yeah, it's really ugly. But otherwise i've got no real complaint > about ext3 - with the obligatory qualification that > "noatime,nodiratime" in /etc/fstab is a must. This speeds up things > very visibly (...). So for most file workloads we give Windows a > 20%-30% performance edge, for almost nothing. It has been years since I used MS Windows much, but from my memories of my these days, I was under the impression that it (at least the NT line, the only surviving line these days) also maintained "last accessed" times. Except I only ever saw it at "right now" because the file explorer ... accesses the file before getting this metadata or something like that (when you right-click on a file and ask for its properties). It has creation and last modification time, too. So, if my memories are correct, there is no performance edge to be conceded by having atime (but one to be gained by not having atime). -- Lionel - 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/