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, 7 Feb 2002 04:07:43 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 7 Feb 2002 04:07:35 -0500 Received: from mta02-svc.ntlworld.com ([62.253.162.42]:9684 "EHLO mta02-svc.ntlworld.com") by vger.kernel.org with ESMTP id ; Thu, 7 Feb 2002 04:07:21 -0500 Date: Thu, 7 Feb 2002 09:07:17 +0000 From: Anthony Campbell To: linux-kernel@vger.kernel.org Cc: sct@redhat.com Subject: Re: Total lockups using ext3 Message-ID: <20020207090717.GB3899@debian.local> Mail-Followup-To: Anthony Campbell , linux-kernel@vger.kernel.org, sct@redhat.com In-Reply-To: <20020201181048.GA3104@debian.local> <20020201184123.A16610@redhat.com> <3C5AFCCA.362C4F3E@zip.com.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3C5AFCCA.362C4F3E@zip.com.au> User-Agent: Mutt/1.3.24i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On 01 Feb 2002, Andrew Morton wrote: > "Stephen C. Tweedie" wrote: > > > > The fact that it always happens when the modem is on also suggests that > > this is not a filesystem problem. > > mm.. There are known scheduling-inside-spinlock bugs in the PPP > driver. Paul is working on these at present. This will cause > deadlocks on SMP. Anthony seems to be running uniprocessor, but > bad things could still happen. > > It'd be interesting to enable the local-apic-on-uniprocessor > and io-apic-on-uniprocessor options, then boot with the > `nmi_watchdog=1' LILO option, see if you can get an NMI oops > backtrace. > > I discovered recently that, at least in 2.4.17, I had included SMP in the configuration by mistake (in fact, I think it happens by default). Eliminating it seems to have solved the lockups, or at least made them much less frequent. Please cc any replies to me as I'm not on the list at present. Anthony -- Anthony Campbell - running Linux GNU/Debian (Windows-free zone) For an electronic book (The Assassins of Alamut), skeptical essays, and over 150 book reviews, go to: http://www.acampbell.org.uk/ Our planet is a lonely speck in the great enveloping cosmic dark. In our obscurity, in all this vastness, there is no hint that help will come from elsewhere to save us from ourselves. [Carl Sagan]