Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964799AbWJIT7x (ORCPT ); Mon, 9 Oct 2006 15:59:53 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S964803AbWJIT7x (ORCPT ); Mon, 9 Oct 2006 15:59:53 -0400 Received: from mx1.redhat.com ([66.187.233.31]:16552 "EHLO mx1.redhat.com") by vger.kernel.org with ESMTP id S964799AbWJIT7w (ORCPT ); Mon, 9 Oct 2006 15:59:52 -0400 Message-ID: <452AAA1D.3020205@redhat.com> Date: Mon, 09 Oct 2006 14:59:25 -0500 From: Eric Sandeen User-Agent: Thunderbird 1.5.0.7 (X11/20060913) MIME-Version: 1.0 To: Eric Sandeen CC: Andrew Morton , Dave Jones , Linux Kernel , Badari Pulavarty , Jan Kara Subject: Re: 2.6.18 ext3 panic. References: <20061002194711.GA1815@redhat.com> <20061003052219.GA15563@redhat.com> <4521F865.6060400@sandeen.net> <20061002231945.f2711f99.akpm@osdl.org> <452AA716.7060701@sandeen.net> In-Reply-To: <452AA716.7060701@sandeen.net> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1457 Lines: 43 Eric Sandeen wrote: >>> I had thought/hoped that this was fixed by Jan's patch at >>> http://lkml.org/lkml/2006/9/7/236 from the thread started at >>> http://lkml.org/lkml/2006/9/1/149, but it seems maybe not. Dave hit this bug >>> first by going through that new codepath.... >> Yes, Jan's patch is supposed to fix that !buffer_mapped() assertion. iirc, >> Badari was hitting that BUG and was able to confirm that Jan's patch >> (3998b9301d3d55be8373add22b6bc5e11c1d9b71 in post-2.6.18 mainline) fixed >> it. > > Looking at some BH traces*, it appears that what Dave hit is a truncate > racing with a sync... (oh btw this is -with the above patch from Jan in place...) -Eric > truncate ... > ext3_invalidate_page > journal_invalidatepage > journal_unmap buffer > > going off at the same time as > > sync ... > journal_dirty_data > sync_dirty_buffer > submit_bh <-- finds unmapped buffer, boom. > > I'm not sure what should be coordinating this, and I'm not sure why > we've not yet seen it on a stock kernel, but only FC6... I haven't found > anything in FC6 that looks like it may affect this. > > -Eric > > *http://people.redhat.com/esandeen/traces/davej_ext3_oops1.txt - 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/