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Mon, 09 Nov 2026 10:29:20 -0800 (PST) Received: from localhost ([2a03:2880:9ff:41::]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-37520512ec1sm99440eec.12.2026.11.09.10.29.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 09 Nov 2026 10:29:19 -0800 (PST) Date: Mon, 09 Nov 2026 10:29:18 -0800 Message-ID: <8025f6aed4bc33298e8be50280ab72e4@gmail.com> From: Stanislav Fomichev To: netdev-bot+sashiko@kernel.org 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, saeedm@nvidia.com, tariqt@nvidia.com, mbloch@nvidia.com, alexanderduyck@fb.com, kernel-team@meta.com, sdf@fomichev.me, dimitri.daskalakis1@gmail.com, almasrymina@google.com, dtatulea@nvidia.com, bobbyeshleman@meta.com, asml.silence@gmail.com, daniel@iogearbox.net, razor@blackwall.org, leitao@debian.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, linux-kselftest@vger.kernel.org, leon@kernel.org In-Reply-To: <179418738174.994134.464817117967884735@kernel.org> Subject: Re: Re: [PATCH net-next v3 7/9] net/mlx5e: lift the netmem TX frag size limit Content-Type: text/plain; charset="utf-8" X-Mailing-List: linux-rdma@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list > [Severity: Low] > Is U32_MAX really the largest length an mlx5 data segment can describe? > The commit message says: > > TX data segments have a 32-bit byte count, so devmem TX frags don't > need a size limit. > > Bit 31 of byte_count looks like it is the inline segment marker rather > than part of the length: [..] > Would a value that matches the hardware, such as (1U << 31) - 1 or SZ_1G, > work better here? The commit message would need updating to match. Let me switch to SZ_1G to be 100% safe. --- pw-bot: cr