[PATCH 1/6] genirq: allow assigning affinity to present but not online CPUs

[Christoph Hellwig]

On Mon, Feb 06, 2017 at 12:03:05PM -0500, Keith Busch wrote:
> Can we use the online CPUs and create a new hot-cpu notifier to the nvme
> driver to free/reallocate as needed? We were doing that before blk-mq. Now
> blk-mq can change the number hardware contexts on a live queue, so we
> can reintroduce that behavior to nvme and only allocate what we need.

That could be a next step, but given how badly I keep messing up core
IRQ bits we'll probably want to wait for two rewrites of those bits
from Thomas before moving on :)