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[204.195.96.226]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-7eaeabbca78sm7047364a12.58.2024.10.23.08.52.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Oct 2024 08:52:19 -0700 (PDT) Date: Wed, 23 Oct 2024 08:52:17 -0700 From: Stephen Hemminger To: chia-yu.chang@nokia-bell-labs.com Cc: netdev@vger.kernel.org, dsahern@gmail.com, davem@davemloft.net, jhs@mojatatu.com, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, dsahern@kernel.org, ij@kernel.org, ncardwell@google.com, koen.de_schepper@nokia-bell-labs.com, g.white@CableLabs.com, ingemar.s.johansson@ericsson.com, mirja.kuehlewind@ericsson.com, cheshire@apple.com, rs.ietf@gmx.at, Jason_Livingood@comcast.com, vidhi_goel@apple.com, Olga Albisser , Oliver Tilmans , Bob Briscoe , Henrik Steen Subject: Re: [PATCH v2 iproute2-next 1/1] tc: add dualpi2 scheduler module Message-ID: <20241023085217.5ae0ea40@hermes.local> In-Reply-To: <20241023110434.65194-2-chia-yu.chang@nokia-bell-labs.com> References: <20241023110434.65194-1-chia-yu.chang@nokia-bell-labs.com> <20241023110434.65194-2-chia-yu.chang@nokia-bell-labs.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Wed, 23 Oct 2024 13:04:34 +0200 chia-yu.chang@nokia-bell-labs.com wrote: > + * DualPI Improved with a Square (dualpi2): > + * - Supports congestion controls that comply with the Prague requirements > + * in RFC9331 (e.g. TCP-Prague) > + * - Supports coupled dual-queue with PI2 as defined in RFC9332 > + * - It is awkward that dualPI is referencing a variant of TCP congestion control that is not supported by Linux. Why has Nokia not upstreamed TCP Prague? I would say if dualpi2 only makes sense with TCP Prague then the congestion control must be upstreamed first?