From owner-freebsd-hackers@FreeBSD.ORG  Thu Sep  4 06:16:32 2003
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From: Don Bowman <don@sandvine.com>
To: 'Mike Silbersack' <silby@silby.com>,
	Don Bowman <don@sandvine.com>
Date: Thu, 4 Sep 2003 09:16:23 -0400 
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cc: "'freebsd-hackers@freebsd.org'" <freebsd-hackers@freebsd.org>
Subject: RE: non reliable nmi
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> From: Mike Silbersack [mailto:silby@silby.com]
> On Thu, 28 Aug 2003, Don Bowman wrote:
> 
> > I have machdep.ddb_on_nmi=1.
> > I can drop into the debugger with the magic
> > key sequence. However, when i hit the NMI
> > jumper, i don't always go there. Sometimes
> > I do.
> > The system is 4-way SMP [2xHTT xeon processors]
> > with 4.7.
> >
> > Any suggestion on where my NMI might be going?
> 
> Is your NMI about 106K in size, and does it have the subjects 
> "Thank you",
> "Wicked screensaver" and others?  If so, I think I know where it's
> going...

?
it was actually a serious question. The nmi header on
my board goes into the ICH-3 of my chipset, but shorting the
jumper out doesn't always enter the debugger. It does
sometimes. If I set the NMI_NOW bit in the ICH-3 I always
enter the debugger. I was curious if anyone else had seen
this behaviour.

--don