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Sat, 24 Jan 2026 07:35:00 -0800 (PST) Received: from [127.0.0.1] ([198.8.77.157]) by smtp.gmail.com with ESMTPSA id 46e09a7af769-7d15b346e03sm4111159a34.1.2026.01.24.07.34.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 24 Jan 2026 07:34:59 -0800 (PST) From: Jens Axboe To: io-uring@vger.kernel.org, Pavel Begunkov Cc: netdev@vger.kernel.org In-Reply-To: References: Subject: Re: [PATCH 1/1] io_uring/zcrx: implement large rx buffer support Message-Id: <176926889954.811798.10308845596157999017.b4-ty@kernel.dk> Date: Sat, 24 Jan 2026 08:34:59 -0700 Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Mailer: b4 0.14.3 On Sat, 24 Jan 2026 10:36:17 +0000, Pavel Begunkov wrote: > There are network cards that support receive buffers larger than 4K, and > that can be vastly beneficial for performance, and benchmarks for this > patch showed up to 30% CPU util improvement for 32K vs 4K buffers. > > Allows zcrx users to specify the size in struct > io_uring_zcrx_ifq_reg::rx_buf_len. If set to zero, zcrx will use a > default value. zcrx will check and fail if the memory backing the area > can't be split into physically contiguous chunks of the required size. > It's more restrictive as it only needs dma addresses to be contig, but > that's beyond this series. > > [...] Applied, thanks! [1/1] io_uring/zcrx: implement large rx buffer support commit: 795663b4d160ba652959f1a46381c5e8b1342a53 Best regards, -- Jens Axboe