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Fri, 06 Feb 2026 05:40:08 -0800 (PST) From: Askar Safin To: joannelkoong@gmail.com Cc: asml.silence@gmail.com, axboe@kernel.dk, bschubert@ddn.com, csander@purestorage.com, io-uring@vger.kernel.org, krisman@suse.de, linux-fsdevel@vger.kernel.org, miklos@szeredi.hu, hch@infradead.org, xiaobing.li@samsung.com Subject: Re: [PATCH v4 03/25] io_uring/kbuf: add support for kernel-managed buffer rings Date: Fri, 6 Feb 2026 16:39:50 +0300 Message-ID: <20260206133950.3133771-1-safinaskar@gmail.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260116233044.1532965-4-joannelkoong@gmail.com> References: <20260116233044.1532965-4-joannelkoong@gmail.com> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Joanne Koong : > Add support for kernel-managed buffer rings (kmbuf rings) Is it true that these kbufs solve same problem splice originally meant for? I. e. is it true that kbuf is modern uring-based replacement for splice? Linus said in 2006 in https://lore.kernel.org/all/Pine.LNX.4.64.0603300853190.27203@g5.osdl.org/ : > The pipe is just the standard in-kernel buffer between two arbitrary > points. Think of it as a scatter-gather list with a wait-queue. That's > what a pipe _is_. Trying to get rid of the pipe totally misses the > whole point of splice(). So, kbuf is modern version of exactly this? -- Askar Safin