From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264186AbUEDBTC (ORCPT ); Mon, 3 May 2004 21:19:02 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264188AbUEDBTC (ORCPT ); Mon, 3 May 2004 21:19:02 -0400 Received: from parcelfarce.linux.theplanet.co.uk ([195.92.249.252]:18870 "EHLO www.linux.org.uk") by vger.kernel.org with ESMTP id S264186AbUEDBS7 (ORCPT ); Mon, 3 May 2004 21:18:59 -0400 Date: Mon, 3 May 2004 22:19:47 -0300 From: Marcelo Tosatti To: Julian Bradfield Cc: linux-kernel@vger.kernel.org Subject: Re: hang with 2.4.26 copying to loopback device Message-ID: <20040504011947.GC8028@logos.cnet> References: <16534.48421.296794.467014@toolo.inf.ed.ac.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <16534.48421.296794.467014@toolo.inf.ed.ac.uk> User-Agent: Mutt/1.5.5.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, May 03, 2004 at 10:44:05PM +0100, Julian Bradfield wrote: > I'm running a vanilla 2.4.26 kernel (on a rather old distro, Mandrake > 9.0). > I have large (6GB) file on a remote NFS server (running 2.4.18), on > which > there is a file system that I'm mounting via loopback. > When I copy to this looped back filesystem, I get a hang after a few > megabytes. After the copy hangs, I move the cursor around and soon X > freezes as well. I can, however, reboot via sysrq. > > I've seen several reports a couple of years ago of deadlocks in > loopback, but nothing recently that I can find via searching. > Is there anything currently known to be an issue, or should I start > preparing a proper report? Please prepare a more complete report with alt+sysrq+p and alt+sysrq+t output if possible. Attaching a serial console to the box is very helpful if you dont want to copy the output by hand.