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Date: Wed, 8 Sep 2010 11:26:05 -0700
From: Alfred Perlstein <alfred@freebsd.org>
To: sbruno@freebsd.org
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Cc: freebsd-hackers <freebsd-hackers@freebsd.org>
Subject: Re: What is the exected behavior with the NMI button?
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* Sean Bruno <seanbru@yahoo-inc.com> [100625 07:18] wrote:
> While trying to get a deadlock sorted out in the GPROF code, I attempted
> to use this fancy shmancy NMI button on my Dell server.
> 
> I noted that, not unlike the goggles, it did nothing once the system was
> deadlocked.  I noted that when the system was running normally, an NMI
> log message would be spewed to the console.
> 
> What is supposed to happen in these two cases when we toggle the NMI
> button?

If you have DDB in kernel and
machdep.panic_on_nmi: 1
machdep.kdb_on_nmi: 1
are set, you should get debugger.

-Alfred



> 
> Sean
> 
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-- 
- Alfred Perlstein
.- AMA, VMOA #5191, 03 vmax, 92 gs500, 85 ch250, 07 zx10
.- FreeBSD committer