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Date: Fri, 24 Feb 2006 18:47:49 -0700
From: Brad Waite <freebsd@wcubed.net>
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Subject: 5.4-STABLE hangs every few days
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Hi all,

Been having problems with my Tyan Thunder i7500 (S2720) dual Xeon 
running -STABLE: it's hanging every couple of days.

I couldn't find any specific fixes on the lists, but I did come across 
some instructions about breaking into the debugger from a serial 
console.  I built a kernel with the following options: DDB, KDB, WITNESS 
& BREAK_TO_DEBUGGER (INVARIANTS wouldn't build).

When it hangs, there seems to be no response - no network activity 
(pings), no response from the keyboard/mouse, but I *am* able to break 
into the debugger.  I ran "show pcpu", "ps", "show threads", "show 
alllocks", "show lockedvnods" and saved the output.  What do I do with 
the data to further troubleshoot my problems?

Thanks.