From: Jan Kara Subject: Re: barriers off by default? Date: Thu, 15 May 2008 16:43:55 +0200 Message-ID: <20080515144355.GB19325@atrey.karlin.mff.cuni.cz> References: <482868A5.1000102@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: ext4 development To: Eric Sandeen Return-path: Received: from atrey.karlin.mff.cuni.cz ([195.113.31.123]:58992 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755730AbYEOOn4 (ORCPT ); Thu, 15 May 2008 10:43:56 -0400 Content-Disposition: inline In-Reply-To: <482868A5.1000102@redhat.com> Sender: linux-ext4-owner@vger.kernel.org List-ID: > As I look at my shiny new 500G disks with 32MB of cache, I find myself > wondering why the default for ext3 and ext4 is to have barriers disabled. > > This is a pretty dangerous default w.r.t. filesystem integrity on power > loss, no? JFYI: SUSE kernel carries for ages a patch which changes this default. I'd be more than happy to drop it ;). Honza -- Jan Kara SuSE CR Labs