Re: APIC error on CPUx

From: Andi Kleen
Date: Mon May 22 2006 - 10:50:22 EST

> "noapic" is a perfectly reasonable thing to use if you don't
> have a lot of interrupt sources and there is no more sharing
> in PIC mode than IOAPIC mode.

It makes interrupt handling much slower. The PIC accesses can be > 50%
of the interrupt handling cost.

Of course that tends to hide some bugs.

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