From owner-freebsd-isp@FreeBSD.ORG Wed Dec 27 20:50:28 2006 Return-Path: X-Original-To: freebsd-isp@freebsd.org Delivered-To: freebsd-isp@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 17E8716A403 for ; Wed, 27 Dec 2006 20:50:28 +0000 (UTC) (envelope-from jan@digitaldaemon.com) Received: from digitaldaemon.com (digitaldaemon.com [63.105.9.34]) by mx1.freebsd.org (Postfix) with SMTP id EB26513C463 for ; Wed, 27 Dec 2006 20:50:26 +0000 (UTC) (envelope-from jan@digitaldaemon.com) Received: (qmail 67330 invoked by uid 98); 27 Dec 2006 20:50:25 -0000 Received: from 63.105.9.34 by digitaldaemon.com (envelope-from , uid 89) with qmail-scanner-1.25 (clamdscan: 0.87/1195. Clear:RC:1(63.105.9.34):. Processed in 0.340147 secs); 27 Dec 2006 20:50:25 -0000 X-Qmail-Scanner-Mail-From: jan@digitaldaemon.com via digitaldaemon.com X-Qmail-Scanner: 1.25 (Clear:RC:1(63.105.9.34):. Processed in 0.340147 secs) Received: from digitaldaemon.com (HELO ?16.81.102.2?) (63.105.9.34) by digitaldaemon.com with SMTP; 27 Dec 2006 20:50:25 -0000 Message-ID: <4592DC8C.4040704@digitaldaemon.com> Date: Wed, 27 Dec 2006 15:50:20 -0500 From: Jan Knepper User-Agent: Thunderbird 1.5.0.9 (Windows/20061207) MIME-Version: 1.0 To: Mike Meyer References: <45918F6E.90006@digitaldaemon.com> <004c01c7293b$d5e03b40$6500a8c0@laptopt> <4591CB3C.1060902@digitaldaemon.com> <200612261808.08984.mario@schmut.com> <4592690B.7080800@digitaldaemon.com> <17810.54292.139339.466850@bhuda.mired.org> In-Reply-To: <17810.54292.139339.466850@bhuda.mired.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: freebsd-isp@freebsd.org, Tim McCullagh , Mario Theodoridis , FreeBSD Hackers Subject: Re: 6.1-RELEASE / 6.2 Kernel Crash... X-BeenThere: freebsd-isp@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Internet Services Providers List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 27 Dec 2006 20:50:28 -0000 Understood... and exactly as I wrote... Not impossible, but not that likely... Thanks! Jan Mike Meyer wrote: > In <4592690B.7080800@digitaldaemon.com>, Jan Knepper typed: > >> FreeBSD 5.x branch run on that machine for almost 2 years without a >> problem and magically the same time period in *hours* that I upgrade the >> machine I get hardware problems too? Not an impossible coincidence, but >> not very likely... >> > > Or it could be that you have a hardware problem in hardware that > wasn't used by 5.x but is by 6.x. > > > I had an 11/750 that ran BSD 4.2 for years with no problems. When I > tried to upgrade it to BSD 4.3, it would reliably panic in namei > during the boot process. We had about a dozen 750s, and this was our > test machine - so none of them were going to be upgraded until this > got fixed, deadline or no. > > Stepping through namei in the debugger showed that one of the > instructions in the function prelude was changing a high bit in a > register it wasn't supposed to touch at all. In 4.2, the register was > unused, because namei got passed a handful of arguments. In 4.3, it > got passed a pointer to a struct with some of that information in it, > and the pointer wound up in said register. Dereferencing the pointer > caused the panic. > > A motherboard replacement solved the problem. > > > >