[Cake] delayed bql and/or ethernet devices with alternate settings

[Dave Taht]

We actually need not do the bandwidth shaping in the qdisc.

IF an ethernet device existed that let you program in
its rate to not be line rate, that would be a nice feature,
then all the existing mechanisms (like BQL) would "just work"
and we would need no software rate shaping in that case.

So, despite transmitting a packet at 1gbit, returning an completion
interrupt as if it was transmitting at a a user specified 20 (or
X)mbit, would work with all the higher mechanisms in the kernel.

(I keep hoping, undocumented, somewhere in every ethernet
 device, is a configuration option like this)

Receive is harder, you still have to drain the rx ring at
line rate.


-- 
Dave Täht
Open Networking needs **Open Source Hardware**

https://plus.google.com/u/0/+EricRaymond/posts/JqxCe2pFr67