Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753435Ab0KGPvS (ORCPT ); Sun, 7 Nov 2010 10:51:18 -0500 Received: from smtp1.linux-foundation.org ([140.211.169.13]:60158 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753309Ab0KGPvR (ORCPT ); Sun, 7 Nov 2010 10:51:17 -0500 MIME-Version: 1.0 In-Reply-To: <4CD696B4.6070002@kernel.dk> References: <20101105014334.GF13830@dastard> <4CD696B4.6070002@kernel.dk> From: Linus Torvalds Date: Sun, 7 Nov 2010 07:50:13 -0800 Message-ID: Subject: Re: 2.6.36 io bring the system to its knees To: Jens Axboe Cc: dave b , Sanjoy Mahajan , Dave Chinner , Jesper Juhl , Chris Mason , Ingo Molnar , Pekka Enberg , Aidar Kultayev , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Andrew Morton , Peter Zijlstra , Nick Piggin , Arjan van de Ven , Thomas Gleixner , "Ted Ts'o" , Corrado Zoccolo , Shaohua Li , Steven Barrett Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 934 Lines: 23 On Sun, Nov 7, 2010 at 4:08 AM, Jens Axboe wrote: > > As already mentioned, ext3 is just not a good choice for this sort of > thing. Did you have atimes enabled? At least for ext3, more important than atimes is the "data=writeback" setting. Especially since our atime default is sane these days (ie if you don't specify anything, we end up using 'relatime'). If you compile your own kernel, answer "N" to the question Default to 'data=ordered' in ext3? at config time (CONFIG_EXT3_DEFAULTS_TO_ORDERED), or you can make sure "data=writeback" is in the fstab (but I don't think everything honors it for the root filesystem). 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/