Messages in this thread | | | Date | Tue, 13 Aug 2002 10:24:54 -0700 (PDT) | From | Linus Torvalds <> | Subject | Re: [PATCH] NUMA-Q disable irqbalance |
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On Tue, 13 Aug 2002, Martin J. Bligh wrote: > > Was there some reason you really need this on P4s? I seem to recall something > to do with timer interrupts, but don't remember exactly.
Without the explicit balancing, _every_single_ external interrupt comes in on CPU0 on a P4.
The P4 local APIC doesn't do irq scheduling in hardware (never mind that Intel documented it as architecture behaviour in earlier local APICs)
Linus
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