[Codel] [RFC v2] fq_codel : interval servo on hosts

[Eric Dumazet]

On Fri, 2012-08-31 at 18:37 -0700, Yuchung Cheng wrote:

> Just curious: tp->srtt is a very rough estimator, e.g., Delayed-ACks
> can easily add 40 - 200ms fuzziness. Will this affect short flows?

Good point

Delayed acks shouldnt matter, because they happen when flow had been
idle for a while.

I guess we should clamp the srtt to the default interval

if (srtt)
	q->cparams.interval = min(tcp_srtt_to_codel(srtt),
				  q->default_interval);