From: Jan Kara Subject: Re: crash in __jbd2_journal_file_buffer Date: Fri, 23 Aug 2013 21:52:54 +0200 Message-ID: <20130823195254.GA12980@quack.suse.cz> References: <20130731190245.GC28018@quack.suse.cz> <20130809212425.GB1050@quack.suse.cz> <20130812125256.GB4596@quack.suse.cz> <20130813103416.GA12197@quack.suse.cz> <20130823095405.GA3568@quack.suse.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Jan Kara , linux-ext4@vger.kernel.org To: Sage Weil Return-path: Received: from cantor2.suse.de ([195.135.220.15]:58266 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754760Ab3HWTwz (ORCPT ); Fri, 23 Aug 2013 15:52:55 -0400 Content-Disposition: inline In-Reply-To: Sender: linux-ext4-owner@vger.kernel.org List-ID: On Fri 23-08-13 08:02:45, Sage Weil wrote: > On Fri, 23 Aug 2013, Jan Kara wrote: > > On Thu 22-08-13 16:35:15, Sage Weil wrote: > > > On Tue, 13 Aug 2013, Jan Kara wrote: > > > > On Mon 12-08-13 11:13:06, Sage Weil wrote: > > > > > Full dmesg is attached. > > > > Hum, nothing interesting in there... > > > > > > > > > Our QA seems to hit this with some regularity. Let me know if there's > > > > > some combination of patches that would help shed more light! > > > > If they can run with attached debug patch it could maybe sched some more > > > > light. Please send also your System.map file together with the dmesg of the > > > > kernel when the crash happens so that I can map addresses to function > > > > names... Thanks! > > > > > > Okay, finally hit it again: > > > > > > <6>[75193.192249] EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro,user_xattr,user_xattr > > > <3>[77877.426658] Dirtying buffer without jh at 4302720297: state 218c029,jh added from 0xffffffff8127ab1d at 4302720297, removed from 0xffffffff8127b5b0 at 4302720296 > > Great! Can you please send me /proc/kallsyms from the machine? > > Attached! Sadly not. I think your MUA got confused by the fact that files in /proc have 0 length and attached empty file. Honza -- Jan Kara SUSE Labs, CR