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From: Robert Watson <rwatson@FreeBSD.org>
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To: Pete French <petefrench@ticketswitch.com>
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Cc: freebsd-stable@freebsd.org, drosih@rpi.edu, jhb@FreeBSD.org,
	rblayzor.bulk@inoc.net
Subject: Re: Big problems with 7.1 locking up :-(
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On Thu, 15 Jan 2009, Pete French wrote:

>> desirable.  You might want to give the NMI a test run just to make sure it 
>> behaves as you think it should, though -- be aware that if DDB/KDB aren't 
>> compiled into the kernel, then an NMI will panic the box.
>
> Unfortunately it does this...
>
> http://toybox.twisted.org.uk/~pete/71_nmi1.png
>
> That is locked up too - hitting return does nothing. I was hoping it was 
> just garbled output but had actually gone to the debugger. Apparently not.
>
> Thats with a config file containing KDB, DDB and BREAK_TO_DEBUGGER, which 
> does work as I have tested it with CTRL_ALT_ESC.

Er, that's rather upsetting.  John, do you have any ideas about this?

Robert N M Watson
Computer Laboratory
University of Cambridge