From owner-freebsd-current@FreeBSD.ORG  Tue Mar  1 04:59:42 2005
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP
	id 7DA1616A4CE; Tue,  1 Mar 2005 04:59:42 +0000 (GMT)
Received: from carver.gumbysoft.com (carver.gumbysoft.com [66.220.23.50])
	by mx1.FreeBSD.org (Postfix) with ESMTP
	id 103A943D3F; Tue,  1 Mar 2005 04:59:42 +0000 (GMT)
	(envelope-from dwhite@gumbysoft.com)
Received: by carver.gumbysoft.com (Postfix, from userid 1000)
	id D1E5972DD4; Mon, 28 Feb 2005 20:59:41 -0800 (PST)
Received: from localhost (localhost [127.0.0.1])
	by carver.gumbysoft.com (Postfix) with ESMTP id CCECF72DCB;
	Mon, 28 Feb 2005 20:59:41 -0800 (PST)
Date: Mon, 28 Feb 2005 20:59:41 -0800 (PST)
From: Doug White <dwhite@gumbysoft.com>
To: Takeharu KATO <takeharu1219@ybb.ne.jp>
In-Reply-To: <42215163.1000802@ybb.ne.jp>
Message-ID: <20050228205837.Y62607@carver.gumbysoft.com>
References: <42210DE2.9060903@ybb.ne.jp> <200502261958.46361.peter@wemm.org>
 <42215163.1000802@ybb.ne.jp>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
cc: freebsd-amd64@freebsd.org
cc: freebsd-current@freebsd.org
cc: current@freebsd.org
Subject: Re: MCE on AMD64
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 01 Mar 2005 04:59:42 -0000

On Sun, 27 Feb 2005, Takeharu KATO wrote:

> Hi
>
> Thank you for your response.
> > There is little or no MCE support in either i386 or amd64 kernels.  The code
> > in i386 has never even been tested, because CR4.MCE was never actually turned
> > on.
> >
> Appearantly, my AMD64 box turn on MCE feature in the CPU.
> I will start to try to write MCE feature support functions.

Make sure you test your code on a Rioworks HDAMA-based AMD64 if you get
the chance. I turned on MCE on our 2.4.25 Linux i386 kernels and they
trapped during the boot.  Apparently there's something goofy with that
board (or Opteron 244 processors?) and MCE.

-- 
Doug White                    |  FreeBSD: The Power to Serve
dwhite@gumbysoft.com          |  www.FreeBSD.org