Hi All,

What do people think of a patch to change the fields in cpu_usage_stat
from unsigned ints to unsigned long longs?  And the same change for
nr_switches in the runqueue structure too?

My colleagues and I believe this is necessary given that the accrued
usage for one CPU will overflow 32 bits fairly quickly if its
continuously busy.  If I understand it correctly, for HZ being 100,
overflow can occur in 497 days.  Its actually worse for context
switches on a busy system, for we've been seeing an average of ten
switches a tick for some of the statistics we have.

I haven't made any changes to the interrupt statistics to use unisnged
long long however.  Perhaps that should be considered as well, but
that'll mean changes to architecture dependent code...

-- 
		Kingsley