dual processor poweredge 2400 process hangs

[Anne & Lynn Wheeler]

i've had process hangs on dual 1gz processor poweredge 2400 (1 gbyte 
memory) with all the smp 13xx kernels and up thru the 14xx kernels.
when processes start hanging ... it requires reboot to clear the problem.

14xx smp kernels appeared to get somewhat better ... taking tens of 
minutes sometimes before hangs appeared (purely subjective ... no real 
rigurous testing methodology).

booting non-smp kernels didn't exhibit the problems

so far kernel-smp-2.6.12-1.1435_FC5 has been running for 24 hrs w/o 
hangs appearing.