i have nearly the same results with Kernel 2.2.17 on a
Pentium 166 MMX Processor and 32MB of RAM. in an embedded System.
My experiences was the second of the 2 Memory's (PS/2 type) was defect.
after changing the Memory, my system runns now stable....
at least after 2 weeks now.
maybe it will be helpful.?
regards
--
Stefan König
DC5MPC
skoenig(a)dc5mpc.de