From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail138.messagelabs.com (mail138.messagelabs.com [216.82.249.35]) by kanga.kvack.org (Postfix) with SMTP id 8B67B6B004A for ; Wed, 10 Nov 2010 11:46:27 -0500 (EST) Received: by gyd8 with SMTP id 8so539587gyd.14 for ; Wed, 10 Nov 2010 08:46:22 -0800 (PST) MIME-Version: 1.0 In-Reply-To: References: <20101105014334.GF13830@dastard> <4CD696B4.6070002@kernel.dk> <20101110013255.GR2715@dastard> Date: Wed, 10 Nov 2010 18:46:21 +0200 Message-ID: Subject: Re: 2.6.36 io bring the system to its knees From: Alexey Dobriyan Content-Type: text/plain; charset=ISO-8859-1 Sender: owner-linux-mm@kvack.org To: Linus Torvalds Cc: Dave Chinner , Jens Axboe , dave b , Sanjoy Mahajan , 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 List-ID: On Wed, Nov 10, 2010 at 5:59 PM, Linus Torvalds wrote: > On Tue, Nov 9, 2010 at 5:32 PM, Dave Chinner wrote: >> >> Don't forget to mention data=writeback is not the default because if >> your system crashes or you lose power running in this mode it will >> *CORRUPT YOUR FILESYSTEM* and you *WILL LOSE DATA*. > > You will lose data even with data=ordered. All the data that didn't > get logged before the crash is lost anyway. Linus, are you using with data=writeback? Those of us, who did (without UPS), will never do it again. Propability of non-trivial FS corruption becomes so much bigger. I believe from my experience, average number of crashes before one loses FS becomes single digit number. With data=ordered, it's quite hard. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: email@kvack.org