From owner-freebsd-current@FreeBSD.ORG Wed Apr 13 05:31:30 2005 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 93D8116A4CE for ; Wed, 13 Apr 2005 05:31:30 +0000 (GMT) Received: from anduin.net (anduin.net [212.12.46.226]) by mx1.FreeBSD.org (Postfix) with ESMTP id 3F48443D2D for ; Wed, 13 Apr 2005 05:31:30 +0000 (GMT) (envelope-from ltning@anduin.net) Received: from ranger.anduin.net ([81.0.162.52] helo=[192.168.1.10]) by anduin.net with esmtpa (Exim 4.50 (FreeBSD)) id 1DLaTF-0000EX-GL for current@freebsd.org; Wed, 13 Apr 2005 07:31:26 +0200 User-Agent: Microsoft-Entourage/11.1.0.040913 Date: Wed, 13 Apr 2005 07:28:01 +0200 From: Eirik =?ISO-8859-1?B?2A==?=verby To: Message-ID: Mime-version: 1.0 Content-type: text/plain; charset="US-ASCII" Content-transfer-encoding: 7bit Subject: Mysterious hangs X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 13 Apr 2005 05:31:30 -0000 Hi, For some time I've been seeing infrequent and seemingly random hangs on my dual opteron system. Motherboard is Tyan K8S Pro. Until now I thought it was a "hard" hang, but I've got serial console hooked up and BREAK_TO_DEBUGGER, DDB and KDB in the kernel, and when sending a break through telnet I get: telnet> send brk KDB: enter: Line break on console And nothing more. Which means the box is sort of alive, but fails to present even the kernel debugger. The machine is currently on 5.4 as of yesterday. It's been hanging before (with anything from days to weeks between), under various variations of 5.x, but I haven't had the serial console before now. Has any one seen this before? Any ideas what I could look at? I suspected hardware, but it seems that isn't the case as most HW errors I've seen would cause a total freeze. Here's to hoping. Thanks, /Eirik