Re: PCI MSI breaks when booting with nosmp

[Andi Kleen]

> Both call disable_ioapic_setup(), so how can they not be the same?

See Jesse's explanation. Basically there is special code in the smp 
boot up to handle 0 CPUs and it disables all APICs.

This is very old and crufty and somewhat obsolete logic,
but it is like that.

-Andi
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