From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 17 Oct 2002 06:13:12 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 17 Oct 2002 06:13:12 -0400 Received: from tailtiu.davidcoulson.net ([194.159.156.4]:19072 "EHLO mail.mx.davidcoulson.net") by vger.kernel.org with ESMTP id ; Thu, 17 Oct 2002 06:13:06 -0400 Message-ID: <3DAE8EEA.4080804@davidcoulson.net> Date: Thu, 17 Oct 2002 11:20:26 +0100 From: David Coulson User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.2a) Gecko/20020915 X-Accept-Language: en-gb MIME-Version: 1.0 To: Jeff Dike CC: Marcelo Tosatti , wstearns@posbox.com, linux-kernel@vger.kernel.org, UML devel Subject: Re: [uml-devel] Re: swap_dup/swap_free errors with 2.4.20-pre10 References: <200210170202.VAA05667@ccure.karaya.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Jeff Dike wrote: > I've seen this bug multiple times. Basically, something is holding a > mm_sem and not letting go. Anything that walks the process list hangs. > Ultimately, this hangs anything that's remotely useful, and you have to > crash the box. Indeed. I experienced the problem every 24-36hrs around five times in a row last week. Pretty much every morning, I'd come in and the box was completly dead. It seems to be okay at the moment, but I'm not holding my breath. > One factoid that I forgot to mention there is that when it happens on my > laptop, the disk activity light is stuck on. My box doesn't have a light, but what I got from SNMP before the box died suggested that the system (e.g. the 'system' CPU usage MIB) was using a considerable amount of CPU time (>95%), so I'm not sure if it was swapping madly, or if something else was going on. David -- David Coulson http://davidcoulson.net/ d@vidcoulson.com http://journal.davidcoulson.net/