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Date:      Mon, 8 Oct 2001 12:15:13 -0500
From:      Mike Meyer <mwm@mired.org>
To:        hackers@freebsd.org
Subject:   Debbuging hard lockups...
Message-ID:  <15297.57121.554185.659525@guru.mired.org>

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I can generate hard lockups on my SMP box pretty easily. When locked,
it fails to respond to anything - I can't even get into the kernel
debugger to fire up. The lockups don't happen on UP machines under the
same conditions, so I can't even see if console debugging would work,
because I don't have a second SMP machine to run the kernel on.

I'm running 4.4-stable, and I'm looking for suggestions on how to deal
with this, other than "don't do that". Debugging kernel options, maybe?

	Thanks,
	<mike
--
Mike Meyer <mwm@mired.org>			http://www.mired.org/home/mwm/
Q: How do you make the gods laugh?		A: Tell them your plans.

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