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Should we drop non-SMP ia64 kernel images?

The biggest headache with maintaining the ia64 kernel has probably been
with the non-SMP flavours.  Generic/non-SMP configs seem to not get much
attention upstream.  This makes sense given that most ia64 machines are
SMP capable.  In fact, I don't think there's a non-SMP capable ia64
machine on the market these days.  A number of them are out there,
however, including the machine I'm using to compose this message...

powerpc64 recently dropped their non-SMP configs, and I'm thinking of
doing the same on ia64.  I'd like to know if anyone on the list knows of
a reason to keep UP kernels around.

Specifically, has anyone performed performance degredation measurements
in this area?  If not, what types of benchmarks are recommended?

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