Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1765865AbXHDVoo (ORCPT ); Sat, 4 Aug 2007 17:44:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1761515AbXHDVoh (ORCPT ); Sat, 4 Aug 2007 17:44:37 -0400 Received: from outpipe-village-512-1.bc.nu ([81.2.110.250]:49452 "EHLO the-village.bc.nu" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1761291AbXHDVog (ORCPT ); Sat, 4 Aug 2007 17:44:36 -0400 Date: Sat, 4 Aug 2007 22:51:21 +0100 From: Alan Cox To: Ingo Molnar Cc: J??rn Engel , Jeff Garzik , Linus Torvalds , Peter Zijlstra , linux-mm@kvack.org, Linux Kernel Mailing List , 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, yingchao.zhou@gmail.com, richard@rsk.demon.co.uk, david@lang.hm Subject: Re: [PATCH 00/23] per device dirty throttling -v8 Message-ID: <20070804225121.5c7b66e0@the-village.bc.nu> In-Reply-To: <20070804210351.GA9784@elte.hu> References: <20070804070737.GA940@elte.hu> <20070804103347.GA1956@elte.hu> <20070804163733.GA31001@elte.hu> <46B4C0A8.1000902@garzik.org> <20070804191205.GA24723@lazybastard.org> <20070804192130.GA25346@elte.hu> <20070804211156.5f600d80@the-village.bc.nu> <20070804202830.GA4538@elte.hu> <20070804210351.GA9784@elte.hu> X-Mailer: Claws Mail 2.9.1 (GTK+ 2.10.13; i386-redhat-linux-gnu) Organization: Red Hat UK Cyf., Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE, Y Deyrnas Gyfunol. Cofrestrwyd yng Nghymru a Lloegr o'r rhif cofrestru 3798903 Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1154 Lines: 24 > i cannot over-emphasise how much of a deal it is in practice. Atime > updates are by far the biggest IO performance deficiency that Linux has > today. Getting rid of atime updates would give us more everyday Linux > performance than all the pagecache speedups of the past 10 years, > _combined_. > > it's also perhaps the most stupid Unix design idea of all times. Unix is > really nice and well done, but think about this a bit: Think about the user for a moment instead. Do things right. The job of the kernel is not to "correct" for distribution policy decisions. The distributions need to change policy. You do that by showing the distributions the numbers. With a Red Hat on if we can move from /dev/hda to /dev/sda in FC7 then we can move from atime to noatime by default on FC8 with appropriate release note warnings and having a couple of betas to find out what other than mutt goes boom. - 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/