From owner-freebsd-stable@FreeBSD.ORG Fri Dec 24 19:43:02 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 79E05106564A for ; Fri, 24 Dec 2010 19:43:02 +0000 (UTC) (envelope-from alan.l.cox@gmail.com) Received: from mail-fx0-f54.google.com (mail-fx0-f54.google.com [209.85.161.54]) by mx1.freebsd.org (Postfix) with ESMTP id 0C56C8FC08 for ; Fri, 24 Dec 2010 19:43:01 +0000 (UTC) Received: by fxm16 with SMTP id 16so7775958fxm.13 for ; Fri, 24 Dec 2010 11:43:01 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:reply-to :in-reply-to:references:date:message-id:subject:from:to:cc :content-type; bh=zPQawLIYfpnCZQcTeuNXeYv3QqZyrNin1B6T5mMchmE=; b=aqzY/IrEIelNs6MLS1bfE/ux1aTe3q20+6/2Tr5JGx2cWwQGJ2RWtcUmyhIZUGh5vG 8MWX7ryL4oUgPRktUF15RwbkWi0RLfIXbsdA/RlPC7FyxRqnwgLlNp4uCT8TSry5JLI8 BTAVSMhVMvX4LENXOdu69jenD5QKQOXxyDkjw= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:reply-to:in-reply-to:references:date:message-id :subject:from:to:cc:content-type; b=pe5MeJURlRz1PLxZt584YoKvJ6vPuXzbaDvHBfHfdvdUhquWFvhmTo5zu7PkaBuy9Z W3pCw6Ek86AFHOr+7ZJ1O3sVeRrZhfG9x0Cv1fttU/y0hNymXJeMOIldn+55VvsIe7xS SicpVF1DR8trLO3Ze6vS1Ijd/Cs024g4M8HgY= MIME-Version: 1.0 Received: by 10.223.74.141 with SMTP id u13mr629604faj.62.1293218416582; Fri, 24 Dec 2010 11:20:16 -0800 (PST) Received: by 10.223.109.138 with HTTP; Fri, 24 Dec 2010 11:20:16 -0800 (PST) In-Reply-To: <4D13A579.8090004@langille.org> References: <4D11F1F5.7050902@quip.cz> <201012220957.26854.jhb@freebsd.org> <4D13A579.8090004@langille.org> Date: Fri, 24 Dec 2010 13:20:16 -0600 Message-ID: From: Alan Cox To: Dan Langille Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: freebsd-stable@freebsd.org, Miroslav Lachman <000.fbsd@quip.cz>, John Baldwin Subject: Re: MCA messages after upgrade to 8.2-BEAT1 X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: alc@freebsd.org List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 24 Dec 2010 19:43:02 -0000 2010/12/23 Dan Langille > On 12/22/2010 9:57 AM, John Baldwin wrote: > >> On Wednesday, December 22, 2010 7:41:25 am Miroslav Lachman wrote: >> >>> Dec 21 12:42:26 kavkaz kernel: MCA: Bank 0, Status 0xd40e400000000833 >>> Dec 21 12:42:26 kavkaz kernel: MCA: Global Cap 0x0000000000000105, >>> Status 0x0000000000000000 >>> Dec 21 12:42:26 kavkaz kernel: MCA: Vendor "AuthenticAMD", ID 0x40f33, >>> APIC ID 0 >>> Dec 21 12:42:26 kavkaz kernel: MCA: CPU 0 COR OVER BUSLG Source DRD >>> Memory >>> Dec 21 12:42:26 kavkaz kernel: MCA: Address 0x236493c0 >>> >> >> You are getting corrected ECC errors in your RAM. You see them once an >> hour >> because we poll the machine check registers once an hour. If this happens >> constantly you might have a DIMM that is dying? >> > > John: > > I take it these ECC errors *may* have been happening for some time. What > has changed is the OS now polls for the errors and reports them. > > Yes, we enabled MCA by default in 8.1-RELEASE. Alan