From: "Aneesh Kumar K.V" Subject: Re: Crash and stack trace for jbd2 under ext4 Date: Mon, 21 Jul 2008 13:50:10 +0530 Message-ID: <20080721082010.GC8788@skywalker> References: <48841077.500@cse.unsw.edu.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: linux-ext4@vger.kernel.org To: Shehjar Tikoo , Mingming Cao Return-path: Received: from E23SMTP03.au.ibm.com ([202.81.18.172]:46905 "EHLO e23smtp03.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754273AbYGUIVi (ORCPT ); Mon, 21 Jul 2008 04:21:38 -0400 Received: from d23relay03.au.ibm.com (d23relay03.au.ibm.com [202.81.18.234]) by e23smtp03.au.ibm.com (8.13.1/8.13.1) with ESMTP id m6L8KZFY014190 for ; Mon, 21 Jul 2008 18:20:35 +1000 Received: from d23av01.au.ibm.com (d23av01.au.ibm.com [9.190.234.96]) by d23relay03.au.ibm.com (8.13.8/8.13.8/NCO v9.0) with ESMTP id m6L8KLbo4554828 for ; Mon, 21 Jul 2008 18:20:21 +1000 Received: from d23av01.au.ibm.com (loopback [127.0.0.1]) by d23av01.au.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id m6L8KKTI011504 for ; Mon, 21 Jul 2008 18:20:21 +1000 Content-Disposition: inline In-Reply-To: <48841077.500@cse.unsw.edu.au> Sender: linux-ext4-owner@vger.kernel.org List-ID: On Mon, Jul 21, 2008 at 02:28:39PM +1000, Shehjar Tikoo wrote: > Hi all > > Please see the contents of the file > for details of two similar crashes observed > on two different commits. Both crashes were > observed while using ext4 on the server while > accessing the export through NFSv3. The link > has more details. > > http://www.gelato.unsw.edu.au/~shehjart/docs/jbd_ext4_crash.txt > I guess we cannot use #define EXT4_MAX_WRITEBACK_CREDITS DIO_CREDITS We do multiple block allocation in ext4_da_writepages and we can get these blocks from different block groups. So we may need to update bitmap of multiple groups. -aneesh