On Tue, 2 Oct 2007, Andi Kleen wrote:
quoted text
> 
> > OTOH, the accounting hook would allow us to remove the IRQ#0 -> CPU#0
> > restriction. Not sure whether it's worth the trouble.
> 
> Some SIS chipsets hang the machine when you migrate irq 0 to another
> CPU. It's better to keep that Also I wouldn't be surprised if there are some
> other assumptions about this elsewhere.
> 
> Ok in theory it could be done only on SIS, but that probably would really
> not be worth the trouble

Agreed.

I just got a x8664-hrt report, where I found the following oddity:

 0:       1197     172881   IO-APIC-edge      timer

That's one of those infamous AMD C1E boxen. Strange, all my systems have 
IRQ#0 on CPU#0 and nowhere else. Any idea ?

	tglx

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