From owner-freebsd-hackers  Fri May  5 21:53:12 2000
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To: Alfred Perlstein <bright@wintelcom.net>
Subject: Re: Can NMI drop a hanging FreeBSD kernel into DDB? 
Cc: Jin Guojun <jin@george.lbl.gov>, hackers@FreeBSD.ORG
In-reply-to: Your message of "Fri, 05 May 2000 12:20:29 PDT."
		<20000505122029.C29830@fw.wintelcom.net> 
References: <20000505122029.C29830@fw.wintelcom.net>  <200005051831.LAA25307@george.lbl.gov> 
Date: Fri, 05 May 2000 22:53:00 -0600
From: Warner Losh <imp@village.org>
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In message <20000505122029.C29830@fw.wintelcom.net> Alfred Perlstein writes:
: hit ctrl+alt+esc on the console, or send a serial break if using
: a serial console, make sure you have BREAK_TO_DEBUGGER if you're
: using a serial console.

Sometimes this isn't enough.

I use the NMI trick often.

However, it won't work if you are hacking pci hardware and manage to
hang the PCI bus.

Warner


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