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([2a01:4b00:bd21:4f00:7cc6:d3ca:494:116c]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4aa7ee575e2sm58301065e9.1.2026.10.29.03.59.24 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 29 Oct 2026 03:59:25 -0700 (PDT) Message-ID: Date: Thu, 29 Oct 2026 10:59:26 +0000 X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 3/5] io_uring/uring_cmd: support dma-buf registered buffers To: Anuj Gupta , axboe@kernel.dk, kbusch@kernel.org, hch@lst.de, sagi@grimberg.me, James.Bottomley@HansenPartnership.com, mkp@kernel.org, bernd@bsbernd.com, joannelkoong@gmail.com, miklos@szeredi.hu Cc: io-uring@vger.kernel.org, linux-nvme@lists.infradead.org, linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, fuse-devel@lists.linux.dev, joshi.k@samsung.com, anuj20.g@samsung.com References: <20261022144501.2478417-1-anuj1072538@gmail.com> <20261022144501.2478417-4-anuj1072538@gmail.com> Content-Language: en-US From: Pavel Begunkov In-Reply-To: <20261022144501.2478417-4-anuj1072538@gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 10/22/26 15:44, Anuj Gupta wrote: > From: Anuj Gupta > > Let callers of io_uring_cmd_import_fixed() opt in to dma-buf registered > buffers with IO_URING_CMD_IMPORT_DMABUF, and attach the current map on > import. > > The map has to be dropped at hardware completion rather than from > task_work. Add io_uring_cmd_hw_done() for drivers to call from end_io, > which drops the map and queues task_work, and warn if task_work is > queued with a map still attached. Reviewed-by: Pavel Begunkov -- Pavel Begunkov