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Wed, 29 Apr 2026 08:30:07 -0700 (PDT) Received: from [10.228.209.141] ([82.132.184.31]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-447b3d481fdsm6740381f8f.8.2026.04.29.08.30.01 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 29 Apr 2026 08:30:07 -0700 (PDT) Message-ID: <46bf2c04-72ab-48a2-a8e1-9f4423eb17a6@gmail.com> Date: Wed, 29 Apr 2026 16:29:51 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 07/10] nvme-pci: implement dma_token backed requests To: Jens Axboe , Keith Busch , Christoph Hellwig , Sagi Grimberg , Alexander Viro , Christian Brauner , Andrew Morton , Sumit Semwal , =?UTF-8?Q?Christian_K=C3=B6nig?= , linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, linux-fsdevel@vger.kernel.org, io-uring@vger.kernel.org, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org Cc: Nitesh Shetty , Kanchan Joshi , Anuj Gupta , Tushar Gohad , William Power , Phil Cayton , Jason Gunthorpe References: <5cecb1157ab784f9f303a91449fdf11b03aa6002.1777475843.git.asml.silence@gmail.com> Content-Language: en-US From: Pavel Begunkov In-Reply-To: <5cecb1157ab784f9f303a91449fdf11b03aa6002.1777475843.git.asml.silence@gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260429_083010_199024_F1CFFEAA X-CRM114-Status: UNSURE ( 9.58 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org On 4/29/26 16:25, Pavel Begunkov wrote: > Enable BIO_DMABUF_MAP backed requests. It creates a prp list for the > dmabuf when it's mapped, which is then used to initialise requests. I left nvme request / map setup as it was in Keith's work for the most part (apart from rebases, adapting it, etc.). It appears I have some use for prp lists, and I know Kanchan, Nitesh and Anuj already have some patches adding sgl support and some other optimisations. Hopefully, I addressed most all feedback from v2. -- Pavel Begunkov