[Bloat] AQM creeping into L2 equipment

[Eric Dumazet]

On Fri, 2014-03-21 at 22:13 +0000, Dave Taht wrote:

> Are you ready to make sch_fq the default in 3.15?


sch_fq depends on ktime_get(), so it is a no go if you have
clocksource using hpet. pfifo_fast doesn't have such issues.

Another issue is TCP CUBIC Hystart 'ACK TRAIN' detection that triggers
early, since goal of TSO autosizing + FQ/pacing is to get ACK clocking
every ms. By design, it tends to get ACK trains, way before the cwnd
might reach BDP.