[Codel] Worst case conditions - large RTT

[Simon Barber]

Codel assesses the minimum delay over a fixed time period (the interval) 
- what happens when the interval is much smaller that the RTT. For 
example a tcp stream is experiencing a 2 second RTT (perhaps due to 
bufferbloat at some point), yet the interval is 100ms. The TCP 
implementation is a poor one that will ACK a window at a time. Here 
codel will drop excessively, and cause low throughput?

Simon