From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gene Heskett Subject: Re: 2.6.20.3: kernel BUG at mm/slab.c:597 try#2 Date: Mon, 19 Mar 2007 17:47:48 -0400 Message-ID: <200703191747.48826.gene.heskett@gmail.com> References: <45FDDA8E.8030100@domdv.de> <45FECD45.20705@cs.wisc.edu> <1174328987.3512.37.camel@mulgrave.il.steeleye.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Return-path: Received: from vms040pub.verizon.net ([206.46.252.40]:35815 "EHLO vms040pub.verizon.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030624AbXCSVrx (ORCPT ); Mon, 19 Mar 2007 17:47:53 -0400 In-reply-to: <1174328987.3512.37.camel@mulgrave.il.steeleye.com> Content-disposition: inline Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: linux-kernel@vger.kernel.org Cc: James Bottomley , Mike Christie , Andreas Steinmetz , linux-scsi@vger.kernel.org, akpm@linux-foundation.org On Monday 19 March 2007, James Bottomley wrote: >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 James, could this also be the cause of a tar based backup going crazy and thinking all data is new under any 2.6.21-rc* kernel I've tested so far with amanda, which in my case uses tar? I've tried the fedora patched tar-1.15-1, and one I hand built right after 1.15-1 came out over a year ago, and they both do it, but only when booted to a 2.6.21-rc* kernel. This obviously will be a show-stopper, either for amanda (and by inference, any app that uses tar), or for the migration of an amanda users machinery to a 2.6.21 kernel. > >- >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/ -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) fractal radiation jamming the backbone