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Date:      Mon, 28 Feb 2005 20:59:41 -0800 (PST)
From:      Doug White <dwhite@gumbysoft.com>
To:        Takeharu KATO <takeharu1219@ybb.ne.jp>
Cc:        current@freebsd.org
Subject:   Re: MCE on AMD64
Message-ID:  <20050228205837.Y62607@carver.gumbysoft.com>
In-Reply-To: <42215163.1000802@ybb.ne.jp>
References:  <42210DE2.9060903@ybb.ne.jp> <200502261958.46361.peter@wemm.org> <42215163.1000802@ybb.ne.jp>

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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



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