Reproducable Kernel HARD lockup

[Rui Paulo]

On Fri, Apr 04, 2008 at 12:24:26AM -0400, Tuc at T-B-O-H.NET wrote:
> Hi,
> 
> 	LONG LONG LONG story made short.
> 
> 	Running Soekris 4801-60 previously on 5.5 . Would lock up
> every so often, then more often, then finally constantly. Shipped
> back to vendor, replaced, all good. Months later started to lock
> every few weeks, then every few hours. Replace CF with hard drive,
> locks in 10 minutes, etc.
> 
> 	Load OpenBSD on disk. Runs for days with no problem. 
> Decide I don't like OpenBSD ports system so decide to go FreeBSD
> 7. Glitch with memory stick, but otherwise system seems to run
> fine. Start SETI, system locks HARD. I have it set to be able
> to break to debugger with CR ~ ^b, but that just doesn't happen.
> (Previously tested it would in single user when system running
> fine).
> 
> 	Is there any way to debug a kernel lockup if you CAN'T
> break to debugger??

http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug.html

Hope this helps.

-- 
Rui Paulo