From: Andreas Dilger Subject: Re: ext3 on latest -git: BUG: unable to handle kernel NULL pointer dereference at 0000000c Date: Thu, 17 Jul 2008 17:09:05 -0600 Message-ID: <20080717230905.GI6239@webber.adilger.int> References: <19f34abd0807170639p838d14blc9a13d2104313f38@mail.gmail.com> <20080717135746.GB14133@unused.rdu.redhat.com> <19f34abd0807170725p13e81e3dq4daad32ad2a83931@mail.gmail.com> <20080717141333.GC14133@unused.rdu.redhat.com> <19f34abd0807170735p5d2cba31kec3fb65c5b8c7b3f@mail.gmail.com> <20080717141655.GD14133@unused.rdu.redhat.com> <19f34abd0807170744r79e46a78odfcfbd67687d2ceb@mail.gmail.com> <20080717143332.GE14133@unused.rdu.redhat.com> <19f34abd0807170800q13cc021dyed27c665c25ac520@mail.gmail.com> <20080717144342.GA15844@unused.rdu.redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7BIT Cc: Vegard Nossum , Josef Bacik , linux-ext4@vger.kernel.org, sct@redhat.com, akpm@linux-foundation.org, Johannes Weiner , linux-kernel@vger.kernel.org To: Josef Bacik Return-path: Received: from sca-es-mail-2.Sun.COM ([192.18.43.133]:42791 "EHLO sca-es-mail-2.sun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754168AbYGQXJI (ORCPT ); Thu, 17 Jul 2008 19:09:08 -0400 In-reply-to: <20080717144342.GA15844@unused.rdu.redhat.com> Content-disposition: inline Sender: linux-ext4-owner@vger.kernel.org List-ID: On Jul 17, 2008 10:43 -0400, Josef Bacik wrote: > Yeah thats a hard to answer question, one that I will leave up to others > who have been doing this much longer than I. My thought is remount-ro > is there to keep you from crashing, so if you have errors=continue then > you expect to live with the consequences. Course if that bit gets flipped > via corruption thats not good either. It shouldn't cause the kernel to crash, but it should definitely return an error to the application. This is probably one of the code paths that the Coverity folks were reporting on in FAST this year where on-disk errors are not propagated to the application. Cheers, Andreas -- Andreas Dilger Sr. Staff Engineer, Lustre Group Sun Microsystems of Canada, Inc.