>I'm wondering, can the APIC be enabled for UP boards? If so, why
>doesn't Linux enable the APIC as the default interrupt controller
>for single processor Pentium+ systems?
Single processor boards don't have an APIC or IO-APIC. If you read
Documentation/SMP.txt, the note:
o Separate IO-APIC from SMP.
means it's on the agenda to allow the IO-APIC to be used by uniprocessor
kernels running on SMP boards. (which, incidently, NT 4.0 can do.)
-George
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