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Date:      Tue, 16 Oct 2012 08:44:41 -0400
From:      John Baldwin <jhb@freebsd.org>
To:        freebsd-fs@freebsd.org
Subject:   Re: I have a DDB session open to a crashed ZFS server
Message-ID:  <201210160844.41042.jhb@freebsd.org>
In-Reply-To: <1350317019.71982.50.camel@btw.pki2.com>
References:  <1350317019.71982.50.camel@btw.pki2.com>

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On Monday, October 15, 2012 12:03:39 pm Dennis Glatting wrote:
> FreeBSD/amd64 (mc) (ttyu0)
> 
> login: NMI ... going to debugger
> [ thread pid 11 tid 100003 ]

You got an NMI, not a crash.  What happens if you just continue ('c' command) 
from DDB?

I have heard of machines sending spurious NMIs in the past.  If that is what 
you are seeing, there is a sysctl to disable dropping into DDB due to an NMI:

machdep.kdb_on_nmi: 1

If you keep getting NMIs, try setting that to 0.

-- 
John Baldwin



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