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([2a01:4b00:bd21:4f00:7cc6:d3ca:494:116c]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4a18be97d1esm608335675e9.8.2026.10.13.13.13.15 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 13 Oct 2026 13:13:16 -0700 (PDT) Message-ID: <736950e0-c890-441e-bfa0-ef5d2b7b7d4a@gmail.com> Date: Tue, 13 Oct 2026 21:13:09 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v9 05/13] block: add dma-buf support for raw bdev To: Anuj Gupta/Anuj Gupta , linux-block@vger.kernel.org Cc: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, linux-nvme@lists.infradead.org, linux-fsdevel@vger.kernel.org, io-uring@vger.kernel.org, Christoph Hellwig , Sumit Semwal , =?UTF-8?Q?Christian_K=C3=B6nig?= , Keith Busch , Sagi Grimberg , Alexander Viro , Christian Brauner , Jan Kara , Andrew Morton , Jens Axboe , Nitesh Shetty , Kanchan Joshi , Mike Snitzer , Mikulas Patocka , Benjamin Marzinski , dm-devel@lists.linux.dev References: Content-Language: en-US From: Pavel Begunkov In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261013_131319_431199_9DD7EDB4 X-CRM114-Status: GOOD ( 12.44 ) 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 10/8/26 13:27, Anuj Gupta/Anuj Gupta wrote: > On 10/7/2026 7:12 AM, Pavel Begunkov wrote: >> +static int blkdev_init_dma_buf_io_ctx(struct file *file, >> + struct dma_buf_io_ctx *ctx) >> +{ >> + struct block_device *bdev = file_bdev(file); >> + struct gendisk *disk = bdev->bd_disk; >> + >> + if (!(file->f_flags & O_DIRECT)) >> + return -EINVAL; >> + if (!disk->fops->init_dma_buf_io_ctx) >> + return -EOPNOTSUPP; > > dma-buf doesn't work with PI: bi_dmabuf_map aliases bi_io_vec, and > blk_integrity_iterate() walks it as bvecs to generate/verify the > checksum. rw-dmabuf liburing test hangs on a PI enabled NVMe. Something > like below is needed: Thanks, I already took it into v10! There is some some confusion with the branches, but will get incorporated in either case. -- Pavel Begunkov