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Date:	Sat, 01 Sep 2012 05:51:24 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Yuchung Cheng <ycheng@...gle.com>
Cc:	codel@...ts.bufferbloat.net, Dave Taht <dave.taht@...il.com>,
	Kathleen Nichols <nichols@...lere.com>,
	netdev <netdev@...r.kernel.org>,
	Nandita Dukkipati <nanditad@...gle.com>,
	Tomas Hruby <thruby@...gle.com>
Subject: Re: [RFC v2] fq_codel : interval servo on hosts

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);



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