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[146.241.41.201]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-438dcc263f0sm222469255e9.9.2025.02.04.04.32.36 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 04 Feb 2025 04:32:38 -0800 (PST) Message-ID: Date: Tue, 4 Feb 2025 13:32:36 +0100 Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH net-next v3 0/6] Device memory TCP TX To: Mina Almasry , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, kvm@vger.kernel.org, virtualization@lists.linux.dev, linux-kselftest@vger.kernel.org Cc: Donald Hunter , Jakub Kicinski , "David S. Miller" , Eric Dumazet , Simon Horman , Jonathan Corbet , Andrew Lunn , Neal Cardwell , David Ahern , "Michael S. Tsirkin" , Jason Wang , Xuan Zhuo , =?UTF-8?Q?Eugenio_P=C3=A9rez?= , Stefan Hajnoczi , Stefano Garzarella , Shuah Khan , sdf@fomichev.me, asml.silence@gmail.com, dw@davidwei.uk, Jamal Hadi Salim , Victor Nogueira , Pedro Tammela , Samiullah Khawaja References: <20250203223916.1064540-1-almasrymina@google.com> Content-Language: en-US From: Paolo Abeni In-Reply-To: <20250203223916.1064540-1-almasrymina@google.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 2/3/25 11:39 PM, Mina Almasry wrote: > The TX path had been dropped from the Device Memory TCP patch series > post RFCv1 [1], to make that series slightly easier to review. This > series rebases the implementation of the TX path on top of the > net_iov/netmem framework agreed upon and merged. The motivation for > the feature is thoroughly described in the docs & cover letter of the > original proposal, so I don't repeat the lengthy descriptions here, but > they are available in [1]. > > Sending this series as RFC as the winder closure is immenient. I plan on > reposting as non-RFC once the tree re-opens, addressing any feedback > I receive in the meantime. I guess you should drop this paragraph. > Full outline on usage of the TX path is detailed in the documentation > added in the first patch. > > Test example is available via the kselftest included in the series as well. > > The series is relatively small, as the TX path for this feature largely > piggybacks on the existing MSG_ZEROCOPY implementation. It looks like no additional device level support is required. That is IMHO so good up to suspicious level :) > Patch Overview: > --------------- > > 1. Documentation & tests to give high level overview of the feature > being added. > > 2. Add netmem refcounting needed for the TX path. > > 3. Devmem TX netlink API. > > 4. Devmem TX net stack implementation. It looks like even the above section needs some update. /P