Re: [PATCH 00/16] dyn_array and nr_irqs support v2

[H. Peter Anvin]

Yinghai Lu wrote:
> > Sorry I was referring to the MSI-X source vector number which is a 12
> > bit index into an array of MSI-X vectors on the pci device, not the
> > vector we receive the irq at on the pci card.
>
> cpu is going to check that vectors in addition to vectors in IDT?

No, but the mapping from MSI-X vectors to -> {CPU, IDT} is arbitrary, as 
the MSI(-X) address and data registers contain the target CPU and 
destination vector, respectively.  However, we may have to manage the 
mappings directly, to re-use IDT entries and provide interrupt balancing.

	-hpa
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