Re: nmi_watchdog fix for x86_64 to be more like i386

[Andi Kleen]

> 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

-Andi
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