I have a DDB session open to a crashed ZFS server

[John Baldwin]

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