Why NVMe MSIx vectors affinity set across NUMA nodes?

[Keith Busch]

On Mon, Jan 22, 2018 at 10:52:59PM +0530, Ganapatrao Kulkarni wrote:
> 
> There are 31 MSIx vectors getting initialised(one per NVMe queue) and
> out of it, 0-15 are getting
> affinity set to node 0 CPUs and vectors 16-30 are getting set to node 1.
> My question is, why not set affinity to all vectors from same node
> CPUs, what was need to use flag PCI_IRQ_AFFINITY?

I'm sorry, but I am not able to parse this question.