From owner-freebsd-current@FreeBSD.ORG Sun Feb 15 22:18:39 2004 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 3137516A4CE; Sun, 15 Feb 2004 22:18:39 -0800 (PST) Received: from srv1.cosmo-project.de (srv1.cosmo-project.de [213.83.6.106]) by mx1.FreeBSD.org (Postfix) with ESMTP id 86AE043D1F; Sun, 15 Feb 2004 22:18:38 -0800 (PST) (envelope-from ticso@cicely12.cicely.de) Received: from cicely5.cicely.de (cicely5.cicely.de [IPv6:3ffe:400:8d0:301:200:92ff:fe9b:20e7]) (authenticated bits=0) i1G6IXrQ011723 (version=TLSv1/SSLv3 cipher=EDH-RSA-DES-CBC3-SHA bits=168 verify=OK); Mon, 16 Feb 2004 07:18:35 +0100 (CET) (envelope-from ticso@cicely12.cicely.de) Received: from cicely12.cicely.de (cicely12.cicely.de [IPv6:3ffe:400:8d0:301::12]) by cicely5.cicely.de (8.12.10/8.12.10) with ESMTP id i1G6IOuL002224 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Mon, 16 Feb 2004 07:18:25 +0100 (CET) (envelope-from ticso@cicely12.cicely.de) Received: from cicely12.cicely.de (localhost [127.0.0.1]) by cicely12.cicely.de (8.12.10/8.12.10) with ESMTP id i1G6INc5051044; Mon, 16 Feb 2004 07:18:24 +0100 (CET) (envelope-from ticso@cicely12.cicely.de) Received: (from ticso@localhost) by cicely12.cicely.de (8.12.10/8.12.10/Submit) id i1G6IM1v051043; Mon, 16 Feb 2004 07:18:23 +0100 (CET) (envelope-from ticso) Date: Mon, 16 Feb 2004 07:18:22 +0100 From: Bernd Walter To: Kris Kennaway Message-ID: <20040216061821.GZ44313@cicely12.cicely.de> References: <20040216055840.GA72555@xor.obsecurity.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20040216055840.GA72555@xor.obsecurity.org> X-Operating-System: FreeBSD cicely12.cicely.de 5.2-CURRENT alpha User-Agent: Mutt/1.5.4i X-Spam-Status: No, hits=-4.9 required=3.0 tests=BAYES_00 autolearn=ham version=2.61 X-Spam-Report: * -4.9 BAYES_00 BODY: Bayesian spam probability is 0 to 1% * [score: 0.0000] X-Spam-Checker-Version: SpamAssassin 2.61 (1.212.2.1-2003-12-09-exp) on cicely5.cicely.de cc: alpha@freebsd.org cc: current@freebsd.org Subject: Re: Scheduling deadlock on alpha? X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: ticso@cicely.de List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 16 Feb 2004 06:18:39 -0000 On Sun, Feb 15, 2004 at 09:58:40PM -0800, Kris Kennaway wrote: > One of the alpha package machines seems to have deadlocked; no > processes are running, but the kernel itself responds to pings, and I > can break to DDB: How long have you waited? It seems that the system was busy waiting for page faults and swap. I've seen conditions lately where this can block the system for a very long time in case there is not enough memory free. The number of processes point to memory stress. I asume you had no chance to take a lock at the disk lights? Havn't looked any deeper into that issue yet because my system uses md based swap in a file and I wanted to recheck with conventional swap partition first. > FreeBSD axp1.FreeBSD.org 5.2-CURRENT FreeBSD 5.2-CURRENT #0: Wed Jan 21 13:30:26 PST 2004 kris@bento.FreeBSD.org:/local0/obj/alpha/a/asami/portbuild/alpha/src-client/sys/NETBOOT alpha > > Scheduler is 4BSD. My system is from 25th jan but is running ULE. Don't remember the version I was running bevor but it did not show this behavour. -- B.Walter BWCT http://www.bwct.de ticso@bwct.de info@bwct.de