NUMA but not SMP

From: Luck, Tony <tony.luck_at_intel.com>
Date: 2006-07-06 09:48:37
IA64 allows NUMA to be set without SMP ... in fact you
end up with this when trying to build a "generic UP" kernel
since CONFIG_IA64_GENERIC selects NUMA, and won't let you
unselect it.

Suddenly this is a problem.  Generic UP kernel fails to build
with an "Undefined: __inc_zone_state", which shows up because
the __inc_zone_state function is defined inside some #if SMP
code, but used inside some #if NUMA code in mm/vmstat.c

What does NUMA && !SMP mean?  Should selecting NUMA force SMP?

-Tony
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Received on Thu Jul 06 10:15:57 2006

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