On Wed, 28 Sep 2011 07:00:55 -0400
Neil Horman [off-list ref] wrote:

I was thinking of something along the lines of two more attributes in
/sys/class/net/<if>/queues:
napi_weight
irq

The former is the napi weight of a given napi instance associated with a queue,
while the latter is a symlink either to ../device/irq or ../device/msi_irqs/<n>/
(or perhaps to ../devices/msi_irqs/<n>/irq if we want more consistency).   This
lets us tune the napi weight of a queue and know what interrupt is associated
with it.  That seems fairly sane to me.

This breaks for the case of some corner case devices like multi-port Marvell boards.
There can be a N to 1 or 1 to N relationship between NAPI and the device.