From owner-freebsd-questions@FreeBSD.ORG Sun May 17 13:14:04 2009 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id DE101106566C for ; Sun, 17 May 2009 13:14:04 +0000 (UTC) (envelope-from dgl@dlee.org) Received: from mail.ff44a.com (mail.ff44a.com [64.127.120.100]) by mx1.freebsd.org (Postfix) with ESMTP id C10FB8FC0C for ; Sun, 17 May 2009 13:14:04 +0000 (UTC) (envelope-from dgl@dlee.org) Received: from localhost (localhost.localdomain [127.0.0.1]) by mail.ff44a.com (Postfix) with ESMTP id 7D2F17E4094; Sun, 17 May 2009 06:03:56 -0700 (PDT) X-Virus-Scanned: amavisd-new at mail.ff44a.com Received: from mail.ff44a.com ([127.0.0.1]) by localhost (mail.ff44a.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id EXqhDdL+qohK; Sun, 17 May 2009 06:03:45 -0700 (PDT) Received: from mini.local (pool-71-178-105-137.washdc.east.verizon.net [71.178.105.137]) by mail.ff44a.com (Postfix) with ESMTP id 1970A7E4091; Sun, 17 May 2009 06:03:44 -0700 (PDT) Date: Sun, 17 May 2009 09:13:40 -0400 From: Doug Lee To: Glen Barber Message-ID: <20090517131340.GD2706@mini.local> Mail-Followup-To: Doug Lee , Glen Barber , freebsd-questions@freebsd.org References: <20090517110657.GC2706@mini.local> <4ad871310905170439o678e2a9dp1c09be26ed9afc75@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4ad871310905170439o678e2a9dp1c09be26ed9afc75@mail.gmail.com> User-Agent: Mutt/1.5.18 (2008-05-17) Cc: freebsd-questions@freebsd.org Subject: Re: 4.11 panic every 23 hours 55 minutes or so X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 17 May 2009 13:14:05 -0000 On Sun, May 17, 2009 at 07:39:46AM -0400, Glen Barber wrote: > On Sun, May 17, 2009 at 7:06 AM, Doug Lee wrote: > > One of the weirder things I've seen in a while here... > > > > OS: FreeBSD 4.11 (yeah I know, old, but generally stable) > > CPU: Intel(R) Pentium(R) 4 CPU 2.00GHz > > real memory ?= 536608768 (524032K bytes) > > Hds: IDE > > > Do you by chance have the kernel built with debugging enabled? Afraid not, nor much space in / for that. I partitioned this system before /modules arrived, and I barely have enough space in / now (about 3 meg free). That shouldn't affect this issue though; I do have separate /usr, /var, and /tmp. I do mount /tmp and /var/run via MFS. > > Problem: ?Ever since a suspitious power outage (I say suspitious > > because we think a surge was also involved), this box has been > > exhibiting kernel panics about every 23 hours 55 minutes, give or > > take about 4 minutes either way. ?Obviously hardware is suspect, > > and hopefully in line for upgrade; but as FreeBSD has always proven > > so stable for me, I'm curious what on earth could cause this sort > > of regular panic? > > > > It's not time of day; if I reboot at 2:00 AM, 3:55 PM, or any other > > time, it's 23:55 or so later I get a panic, whenever that may be. > > I think this rules out cron jobs, external attacks, and load-based > > issues. > > > Perhaps a bad CMOS battery causing the system time to become > corrupted? (I know it's a long shot...) Interesting idea, though I'd be surprised since I think the system time is set via ntpd, is it not? `date' seems to recover nicely every time anyway. A power surge could indeed play with CMOS though... but how would I test for this while the system is running? -- Doug Lee dgl@dlee.org http://www.dlee.org SSB BART Group doug.lee@ssbbartgroup.com http://www.ssbbartgroup.com "Pray devoutly, but hammer stoutly." --Sir William G. Benham