From owner-freebsd-stable@FreeBSD.ORG Thu Jul 24 18:36:50 2008 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 2CEE2106567B for ; Thu, 24 Jul 2008 18:36:50 +0000 (UTC) (envelope-from cswiger@mac.com) Received: from mail-out4.apple.com (mail-out4.apple.com [17.254.13.23]) by mx1.freebsd.org (Postfix) with ESMTP id 1919C8FC18 for ; Thu, 24 Jul 2008 18:36:50 +0000 (UTC) (envelope-from cswiger@mac.com) Received: from relay12.apple.com (relay12.apple.com [17.128.113.53]) by mail-out4.apple.com (Postfix) with ESMTP id 9F531357EA08; Thu, 24 Jul 2008 11:16:50 -0700 (PDT) Received: from relay12.apple.com (unknown [127.0.0.1]) by relay12.apple.com (Symantec Mail Security) with ESMTP id 8C11E464005; Thu, 24 Jul 2008 11:16:50 -0700 (PDT) X-AuditID: 11807135-ab104bb000000854-ef-4888c7120080 Received: from cswiger1.apple.com (cswiger1.apple.com [17.227.140.124]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by relay12.apple.com (Apple SCV relay) with ESMTP id 6175C420008; Thu, 24 Jul 2008 11:16:50 -0700 (PDT) Message-Id: From: Chuck Swiger To: John Sullivan In-Reply-To: Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (Apple Message framework v928.1) Date: Thu, 24 Jul 2008 11:16:48 -0700 References: <854CADB9D95147CAB10BC35887A8E5DC@emea.hubersuhner.net> <20080716031640.7DC744500E@ptavv.es.net> <62b856460807160743v3fce951eg1b2bd9e50a35ba1d@mail.gmail.com> <487E0D1B.2060902@FreeBSD.org> <20080716203900.5jt4qce17gg0og0o@mail.basicnets.co.uk> X-Mailer: Apple Mail (2.928.1) X-Brightmail-Tracker: AAAAAA== Cc: FreeBSD Stable List Subject: Re: Fresh 7.0 Install: Fatal Trap 12 panic when put under load X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 24 Jul 2008 18:36:50 -0000 On Jul 24, 2008, at 9:15 AM, John Sullivan wrote: > Right, after trying for a number of days the system still just hung > without letting me get either a dump or to interactively debug > in the failed state, I reverted back to the Generic kernel, removed > half the memory (2 of the 4 1GB sticks) and the system became > stable. I inserted 1 of the 2 removed sticks and all was fine. I > swapped that stick with the remaining stick and all was fine. I > put them both back in and I started to see the crashes again - the > first of which, gave me this dump --> You might want to double-check the detailed documentation about your motherboard. There are a fair number of consumer-grade motherboards that can't reliably handle 4 double-sided DIMMs at full speed. Some of them require you to downgrade the memory clock from, say, PC3200 (aka 200MHz DDR) down to PC2700 speed (aka 166MHz DDR); others may work, but only if you install the more expensive buffered type of RAM (which also tend to include ECC) rather than generic unbuffered RAM. Regards, -- -Chuck