[Codel] [Cake] [RFC PATCH] Don't give malicious CE senders a free ride

[Jonathan Morton]

> On 6 Oct, 2016, at 07:28, Dave Taht <dave.taht at gmail.com> wrote:
> 
> After doing myself in with BBR not respecting CE marks, I'm now thinking
> that perhaps the right thing for red/fq_codel/cake/pie/etc to do is actually
> *drop* stuff that it sees that is already CE marked, when it too wants
> to mark, instead of giving it a free ride.
> 
> It's an unfriendly world out there.

I’m consciously relying on FQ behaviour and the BLUE component of COBALT to take care of flows unresponsive to CE marks.  They harm their own latency and don’t get (much) improvement in throughput, FQ keeps them from impacting other flows, and BLUE starts dropping if their window growth is unbounded.

 - Jonathan Morton