At least there will be a testable version of a L4S compliant BBRv2 before it goes upstream. (see below)
I fear for what this will do to every inbound shaper in the world. (and also network namespaces, the fq_codel for wifi stuff, and the entire fq_codel deployment in general). All along (regardless of the SCE idea) I'd hoped for a simple, conservative rfc3168 compliant response in BBR to CE markings, and I didn't like how much BBR ignores packet loss as a signal in the first place. I thought, when the end users are desperately inbound shaping to keep their networks usable for all traffic, explicit signalling from that existing userbase with that expectation for a reasonable response seemed so reasonable... /me logs out for the day ---------- Forwarded message --------- From: 'Neal Cardwell' via BBR Development <[email protected]> Date: Tue, May 28, 2019 at 7:11 AM Subject: Re: [bbr-dev] BBR v2 ECN To: Ingemar Johansson <[email protected]> Cc: BBR Development <[email protected]> On Tue, May 28, 2019 at 8:35 AM Ingemar Johansson <[email protected]> wrote: > > Hi > > > Looking through the v5.2-rc2 code I can see that a parameter 'delivered_ce' > is defined in tcp_sock but other than that I don't see any evidence for the > support of ECN (L4S) in BBRv2. Do you still plan to include L4S support for > BBRv2 ? Hi Ingemar, Yes, we still plan on including L4S support for BBRv2. BBRv2 is not upstream in the Linux TCP code base yet. We are working on getting the code ready for a pre-release/RFC version that we plan on posting at: https://github.com/google/bbr But indeed tp->delivered and tp->delivered_ce are part of the infrastructure inside the Linux TCP stack that BBRv2 makes use of. cheers, neal -- You received this message because you are subscribed to the Google Groups "BBR Development" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/bbr-dev/CADVnQy%3DF4rHfLt2Nm-1rUGkfMjueju_mWj5f%2BDdqFqBdaJ83oA%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout. -- Dave Täht CTO, TekLibre, LLC http://www.teklibre.com Tel: 1-831-205-9740 _______________________________________________ Bloat mailing list [email protected] https://lists.bufferbloat.net/listinfo/bloat
