From owner-freebsd-stable@FreeBSD.ORG Wed Aug 25 12:27:44 2010 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 156CB106566C for ; Wed, 25 Aug 2010 12:27:44 +0000 (UTC) (envelope-from jhb@freebsd.org) Received: from cyrus.watson.org (cyrus.watson.org [65.122.17.42]) by mx1.freebsd.org (Postfix) with ESMTP id D9D808FC1A for ; Wed, 25 Aug 2010 12:27:43 +0000 (UTC) Received: from bigwig.baldwin.cx (66.111.2.69.static.nyinternet.net [66.111.2.69]) by cyrus.watson.org (Postfix) with ESMTPSA id 7D1AF46B86; Wed, 25 Aug 2010 08:27:43 -0400 (EDT) Received: from jhbbsd.localnet (smtp.hudson-trading.com [209.249.190.9]) by bigwig.baldwin.cx (Postfix) with ESMTPSA id 75FB48A03C; Wed, 25 Aug 2010 08:27:42 -0400 (EDT) From: John Baldwin To: freebsd-stable@freebsd.org Date: Wed, 25 Aug 2010 08:23:11 -0400 User-Agent: KMail/1.13.5 (FreeBSD/7.3-CBSD-20100819; KDE/4.4.5; amd64; ; ) References: <4C71CC62.6060803@langille.org> <4C745213.3050004@langille.org> In-Reply-To: <4C745213.3050004@langille.org> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <201008250823.11954.jhb@freebsd.org> X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.0.1 (bigwig.baldwin.cx); Wed, 25 Aug 2010 08:27:42 -0400 (EDT) X-Virus-Scanned: clamav-milter 0.95.1 at bigwig.baldwin.cx X-Virus-Status: Clean X-Spam-Status: No, score=-2.6 required=4.2 tests=AWL,BAYES_00 autolearn=ham version=3.2.5 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on bigwig.baldwin.cx Cc: Dan Langille Subject: Re: kernel MCA messages 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: Wed, 25 Aug 2010 12:27:44 -0000 On Tuesday, August 24, 2010 7:13:23 pm Dan Langille wrote: > On 8/22/2010 9:18 PM, Dan Langille wrote: > > What does this mean? > > > > kernel: MCA: Bank 4, Status 0x940c4001fe080813 > > kernel: MCA: Global Cap 0x0000000000000105, Status 0x0000000000000000 > > kernel: MCA: Vendor "AuthenticAMD", ID 0xf5a, APIC ID 0 > > kernel: MCA: CPU 0 COR BUSLG Source RD Memory > > kernel: MCA: Address 0x7ff6b0 > > > > FreeBSD 7.3-STABLE #1: Sun Aug 22 23:16:43 > > FYI, these are occurring every hour, almost to the second. e.g. > xx:56:yy, where yy is 09, 10, or 11. > > Checking logs, I don't see anything that correlates with this point in > the hour (i.e 56 minutes past) that doesn't also occur at other times. > > It seems very odd to occur so regularly. That is because machine checks for corrected errors have to be polled and the kernel polls once an hour. On newer Intel CPUs (such as Nehalem) there is a separate interrupt (CMCI) that can fire for corrected errors. -- John Baldwin