5.4-STABLE hangs every few days

[Brad Waite]

Kris Kennaway wrote:
> On Fri, Feb 24, 2006 at 06:47:49PM -0700, Brad Waite wrote:
>> 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).
> 
> Perhaps you forgot INVARIANT_SUPPORT.

Thanks, Kris.  I didn't know I needed it (just going by some 
instructions on the list).  What does INVARIANTS do, anyway?  Will it 
help troubleshoot this problem?