Re: [PATCH v6] x86/apic: limit irq affinity

[Yinghai Lu]

Peter Zijlstra wrote:
> On Tue, 2009-11-24 at 10:27 -0800, Yinghai Lu wrote:
> 
>> we already have dev numa node, so could just make irqblance to some smart to use
>> that device node corresponding for irq that is binding to the device.
> 
> The argument is that a single device can have multiple IRQs and
> therefore numa nodes.

one node could have 8 cores or 16 threads, so should be right.

other case the intel new 4 sockets system will have two IOHs, and one for socket0 and socket 1
and one for socket2 and socet3

acpi root bus _PXM only can return one.
so wonder if ACPI spec need to be extended to support two nodes there.

after that, we need to extend numa_node to support that.

YH
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