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Thu, 05 Nov 2026 09:55:53 -0800 (PST) Received: from localhost ([2a03:2880:9ff:6a::]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-1b25100667esm9741999c88.19.2026.11.05.09.55.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 05 Nov 2026 09:55:53 -0800 (PST) Date: Thu, 5 Nov 2026 09:50:21 -0800 From: Stanislav Fomichev To: Dragos Tatulea Cc: netdev@vger.kernel.org, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, andrew+netdev@lunn.ch, edumazet@kernel.org, horms@kernel.org, corbet@lwn.net, skhan@linuxfoundation.org, rdunlap@infradead.org, michael.chan@broadcom.com, pavan.chebbi@broadcom.com, sdf@fomichev.me, almasrymina@google.com, bobbyeshleman@meta.com, asml.silence@gmail.com, razor@blackwall.org, daniel@iogearbox.net, leitao@debian.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: Re: [PATCH net-next v2 7/7] selftests: drv-net: devmem: TX from a hugepage-backed dmabuf Message-ID: References: <20261103235152.1904727-1-sdf@fomichev.me> <20261103235152.1904727-8-sdf@fomichev.me> <51381a84-de40-4d4f-982d-9585a2344119@nvidia.com> X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <51381a84-de40-4d4f-982d-9585a2344119@nvidia.com> On 11/04, Dragos Tatulea wrote: > On 04.11.26 00:51, Stanislav Fomichev wrote: > > TX net_iovs are now sized from the dmabuf layout, but the TX tests > > use a regular memfd, which usually keeps them small. Add -H to ncdevmem > > to back the udmabuf with 2MB hugepages and a TX test which sends a 3MB > > buffer from it, so that frags end at and continue past the 2MB net_iov > > boundary. The payload has a 7 byte period to catch offset errors. > > > Why not add a test with a BIG TCP GSO test as well? I hope we eventually will have all this tested on NIPA with a "perfect" config. Here I did not do big tcp because I wanted apples to apples. > Nice improvement btw. FWIW for the series: > Reviewed-by: Dragos Tatulea Ty for the review!