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 <bbr-...@googlegroups.com> Date: Tue, May 28, 2019 at 7:11 AM Subject: Re: [bbr-dev] BBR v2 ECN To: Ingemar Johansson <i...@ijdata.com> Cc: BBR Development <bbr-...@googlegroups.com> On Tue, May 28, 2019 at 8:35 AM Ingemar Johansson <i...@ijdata.com> 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 bbr-dev+unsubscr...@googlegroups.com. 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 Bloat@lists.bufferbloat.net https://lists.bufferbloat.net/listinfo/bloat