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Date: Fri, 10 Nov 2000 15:37:31 -0800
From: "H. Peter Anvin" <hpa@transmeta.com>
Organization: Transmeta Corporation
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To: Rogier Wolff <R.E.Wolff@BitWizard.nl>
CC: "H. Peter Anvin" <hpa@zytor.com>, linux-kernel@vger.kernel.org
Subject: Re: APIC errors w/ 2.4.0-test11-pre2
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Rogier Wolff wrote:
> 
> > I have seen the same problem on the same motherboard.  It appears to
> > be a motherboard bug that 2.4 exposes and 2.2 doesn't.
> 
> This PRINT was added in 2.4.
> 
> You're seeing noise on the apic lines. The APICs notice, but every now
> and then you may see a lockup due to this. (i.e. if the corruption
> does not trigger a parity error, because two bits flipped!)
> 

What I was seeing, though, was that 2.4 would lock up with an NMI deadman
after a few days.  2.2 never did.  Even on other hardware I see very high
NMI rates, but no lockups, using 2.4.

	-hpa

-- 
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
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