From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262575AbTJYLqM (ORCPT ); Sat, 25 Oct 2003 07:46:12 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262576AbTJYLqM (ORCPT ); Sat, 25 Oct 2003 07:46:12 -0400 Received: from as6-4-8.rny.s.bonet.se ([217.215.27.171]:55568 "EHLO pc2.dolda2000.com") by vger.kernel.org with ESMTP id S262575AbTJYLqL (ORCPT ); Sat, 25 Oct 2003 07:46:11 -0400 From: Fredrik Tolf MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <16282.25212.456947.292339@pc7.dolda2000.com> Date: Sat, 25 Oct 2003 13:46:04 +0200 To: Mike Anderson Cc: Fredrik Tolf , Patrick Mansfield , linux-kernel@vger.kernel.org Subject: Re: Elevator bug in concert with usb-storage In-Reply-To: <20031025062759.GB1288@beaverton.ibm.com> References: <16279.15393.575929.983297@pc7.dolda2000.com> <20031023082726.A20073@beaverton.ibm.com> <16280.9893.292564.320412@pc7.dolda2000.com> <20031025062759.GB1288@beaverton.ibm.com> X-Mailer: VM 7.17 under Emacs 21.2.1 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Mike Anderson writes: > Fredrik Tolf [fredrik@dolda2000.com] wrote: > > Sorry, that didn't work well. It doesn't crash on the same thing > > anymore, but nonetheless crashes. In addition, when I have removed the > > device but not yet umounted the filesystem, I tried to ls its root > > dir. Before, nothing extraordinary happened then, but now there's a > > couple of oopses for the ls process as well. > > > > .. snip .. > > > > Call Trace: > > [] elv_queue_empty+0x1d/0x20 > > [] __make_request+0x80/0x4ae > > [] generic_make_request+0x134/0x186 > > I tried to reproduce this error last night using the scsi_debug driver, > but could not. I tried different combinations of file systems (fat, ext2, > ext3). I did notice that I had elevator=deadline on the cmdline. I > removed this in case the elevator_queue_empty_fn between the two > elevators made a difference. I still was unable to reproduce. I will try > a few more combinations of things this weekend and let you know what I > find out. There might be a race still with our cleanups and I am not > able to reproduce it exactly on my system. Be aware that this was with usb-storage as the back-end driver. I don't know if that might make some difference (as opposed to using scsi_debug, that is). Is there anything I can do to help? Fredrik Tolf