From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030510AbXCSSaJ (ORCPT ); Mon, 19 Mar 2007 14:30:09 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030521AbXCSSaI (ORCPT ); Mon, 19 Mar 2007 14:30:08 -0400 Received: from hancock.steeleye.com ([71.30.118.248]:36282 "EHLO hancock.sc.steeleye.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1030503AbXCSSaG (ORCPT ); Mon, 19 Mar 2007 14:30:06 -0400 Subject: Re: 2.6.20.3: kernel BUG at mm/slab.c:597 try#2 From: James Bottomley To: Mike Christie Cc: Andreas Steinmetz , Linux Kernel Mailinglist , linux-scsi@vger.kernel.org, akpm@linux-foundation.org In-Reply-To: <45FECD45.20705@cs.wisc.edu> References: <45FDDA8E.8030100@domdv.de> <45FECD45.20705@cs.wisc.edu> Content-Type: text/plain Date: Mon, 19 Mar 2007 13:29:47 -0500 Message-Id: <1174328987.3512.37.camel@mulgrave.il.steeleye.com> Mime-Version: 1.0 X-Mailer: Evolution 2.8.3 (2.8.3-1.fc6) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2007-03-19 at 12:49 -0500, Mike Christie wrote: > > I can't even say if the tapes are written correctly as I can't read them > > (one does not reboot production machines back to 2.4.x just to try to > > read a backup tape - I don't have 2.6.x older than 2.6.20 on these > > machines). > > Could you try this patch > http://marc.info/?l=linux-scsi&m=116464965414878&w=2 > I thought st was modified to not send offsets in the last elements but > it looks like it wasn't. Actually, there are two patches in the email referred to. If the analysis that we're passing NULL to mempool_free is correct, it should be the second one that fixes the problem (the one that checks bio->bi_io_vec before freeing it). Which would mean we have a nr_vecs==0 bio generated by the tar somehow. James