[Cake] Upstream submission of dual-mode fairness patch

[George Amanakis]

On Fri, 2019-03-01 at 22:02 -0500, George Amanakis wrote:
> 
> I will setup a vlan and try again.
> 

I replicated Pete's VLAN setup, and I am getting fairness:

IP1,2 <---> router enp1s0 / router enp1s0.100 <---> server

IP1, 1 up:      46.73 mbit/s
IP2, 32 up:     46.91
IP1, 32 down:   46.70
IP2, 1 down:    46.89

qdisc cake 8006: dev enp1s0.100 root refcnt 2 bandwidth 100Mbit
diffserv3 dual-srchost nonat nowash no-ack-filter split-gso nofwmark
rtt 100.0ms noatm overhead 4

qdisc cake 8002: dev ifb0 root refcnt 2 bandwidth 100Mbit diffserv3
dual-dsthost nonat nowash no-ack-filter split-gso nofwmark rtt 100.0ms
noatm overhead 4