FWIW, on one of the two machines I think it was a flaky CPU; one of
the two Pentium 3's completely died a few days ago. Since replacing
it, things have been good.
Thanks for the replies; I have some great ideas on how to try
diagnosing the other one.
also please upgrade to 2.2.13, it has a number of SMP fixes as well.
if the problem remains (and the other suggestions on this list didnt help
either), then could you try the latest 2.3 kernels? They have more verbose
(and more robust) SMP/APIC code, and automatic hard-lockup-prevention code
which will produce meaningful oopses instead of a silent hang.
-- mingo
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