> I heard there were some problems with ia64 have those been fixed too?

IA64 has a 64KB page allocated for each cpu for the percpu data. Right
now we are using 28K-32K for the arch/ia64/configs/* variations.

> Anybody would have a problem with increasing per CPU data in a
> standard kernel by a few KB?

How many is "a few" ... and much more importantly is your few KB
a fixed amount, or does it scale up with the number of network cards
(or anything else that there might be a lot of on a large system)?

A fixed extra 8-10K should be fine.  #NIC * 1K would cause problems.

-Tony
 
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