From owner-freebsd-current@FreeBSD.ORG  Sun Feb 12 09:55:56 2012
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: current@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 9EA3A106564A;
	Sun, 12 Feb 2012 09:55:56 +0000 (UTC)
	(envelope-from nyan@FreeBSD.org)
Received: from sakura.ccs.furiru.org (sakura.ccs.furiru.org
	[IPv6:2001:2f0:104:8060::1])
	by mx1.freebsd.org (Postfix) with ESMTP id 2FB848FC13;
	Sun, 12 Feb 2012 09:55:55 +0000 (UTC)
Received: from localhost (authenticated bits=0)
	by sakura.ccs.furiru.org (unknown) with ESMTP id q1C9tn2v009877;
	Sun, 12 Feb 2012 18:55:54 +0900 (JST)
	(envelope-from nyan@FreeBSD.org)
Date: Sun, 12 Feb 2012 18:55:49 +0900 (JST)
Message-Id: <20120212.185549.343708041257811633.nyan@FreeBSD.org>
To: jhb@freebsd.org
From: TAKAHASHI Yoshihiro <nyan@FreeBSD.org>
X-Mailer: Mew version 6.3 on Emacs 22.3 / Mule 5.0 (SAKAKI)
Mime-Version: 1.0
Content-Type: Text/Plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Cc: current@freebsd.org
Subject: MCA UNCOR error
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.5
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: Sun, 12 Feb 2012 09:55:56 -0000

I get the following error and kernel panic on my pc98 at the boot time.

MCA: Bank 2, Status 0xb600000000140000
MCA: Global Cap 0x0000000000000005, Status 0x0000000000000004
MCA: Vendor "GenuineIntel", ID 0x616, APIC ID 0
MCA: CPU 0 UNCOR PCC no error
MCA: Address 0x3446ff003446ff

When I disable MCA with hw.mca.enabled=0 on loader prompt, the machine
works fine.  Does it mean my pc98 is broken?  Or other isssue?

It's spec is:

FreeBSD 10.0-CURRENT #5: Thu Feb  9 13:18:22 UTC 2012
CPU: Pentium Pro (198.95-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0x616  Family = 6  Model = 1  Stepping = 6
  Features=0xf9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV>
real memory  = 134217728 (128 MB)
avail memory = 120471552 (114 MB)

---
TAKAHASHI Yoshihiro <nyan@FreeBSD.org>