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Petersen" , Keith Busch , Kanchan Joshi , "hare@suse.de" , "sagi@grimberg.me" , "viro@zeniv.linux.org.uk" , "jack@suse.cz" , "jaegeuk@kernel.org" , "bcrl@kvack.org" , "dhowells@redhat.com" , "bvanassche@acm.org" , "asml.silence@gmail.com" , "linux-nvme@lists.infradead.org" , "linux-fsdevel@vger.kernel.org" , "io-uring@vger.kernel.org" , "linux-block@vger.kernel.org" , "linux-aio@kvack.org" , "gost.dev@samsung.com" , "vishak.g@samsung.com" Subject: Re: [PATCH v7 0/3] FDP and per-io hints Message-ID: <20241011122102.znguf6kpmbbsa42t@ArmHalley.local> 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"; format="flowed" Content-Disposition: inline In-Reply-To: <20241011085631.GA4039@lst.de> X-ClientProxiedBy: CAMSVWEXC01.scsc.local (2002:6a01:e347::6a01:e347) To CAMSVWEXC02.scsc.local (2002:6a01:e348::6a01:e348) X-Brightmail-Tracker: H4sIAAAAAAAAA02SfUxbZRTG9957e3vbpN2lQHhD51fJjBkDuujm6/dm1FzndHNZMCiJq3JX lpWWtAOdlawWKqNO3AoOYW5jZLGsMAilgs6yjcJGO2gJFBAwJYS1qLCOrynOBZD2ou6/3znP c3LO8+alcMkKL5E6qD7MatUKlYwUEi037vWmyKFAKTeObkPf2loAqgt8RSLzsoNA0x3zAJ2a vYejO8b7BDrzdR0POWssGLpYdx1Dd0w+Ap2uKMRQsLEKRxbXEEDlp4wAtY0mI2ebh0Dnvgvx kbVrGUMN0zME6l3q4m2PY/wDbzA/VgX4TO9YE8H4vXmM3VZCMvZ5C59pvnCU+WnEQDJzoVGC 6bDX8JiZK4Mk01PduSp265kF+8OMPRjG9qx/V/h8Fqs6mM9q017cL8wePLdC5o4LPr5i0BnA DN8MBBSkn4LO+lbCDISUhK4F8JqtGeOKuwCuXL8LuGIBwDF3xaqNio7ccOZxfSuAxbNu/D9T 2FrK4woHgJaTRjyyhKA3wrbTfxMRJuk0aGu9CSIcR8tgaMobXYHTi3xYNuyOCrG0HM4sfklG WES/ACsbagiOY6CnMhhlnH4WlswaeZGTcFoKrctUpC2gk2FgYmotnAze+i0MOC6ANx2j0WyQ NgvhyIkBjBNegQvfzJEcx8KpLsfa8AbYXXac4FgPDR732nARgKZj3/O4t3gOlvaoOM8OeLy/ H3BtMRwOx3BniqGlpQLn2iJ47HMJ534c1o3dJk6ApKoHglU9EKzq/2DVALeBBDZPl6NkdVvU 7EepOkWOLk+tTP1Qk2MHq3+0e7lr/gdwZmou1QUwCrgApHBZnCjlPE8pEWUpjnzCajXva/NU rM4FpBQhSxBtzHqEldBKxWH2EMvmstp/VYwSJBqwlIfGl1/ajJIU+fmH3I3C7Jb1fUuu2pH6 +J7ffZ9Ovm5vh5VDv2x4R9XgN43Vtb/9RUdwn9RTXL7Jf1/fmZGl3rlbf4E8MNSePp0RDoc1 617d1R7sCLvGPb8uvlXw2R/O6glN3zO+yc6rl+VNxeXUQO2lwKP5wmuZwlBqbFNCStPts0/o JxP7rAm+0mGdeN/Mm5eIo2e3qj8oZL2x6UZ/Qn3By+/deu1q0YBc6ujfsa5M0ZyStL/IV7rL PGE0l4Q8Jlmmx4al/ZU7eN57IP5ngbIwXex3WUYzTd6lnY+17g0ELz9ZfHFk959YTEYPLeUL NcmCzSD+yB7nVvHT27ftbZQRumzFlk24Vqf4B86lIfESBAAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprNKsWRmVeSWpSXmKPExsVy+t/xe7oGEpzpBrNfcVvMWbWN0WL13X42 i65/W1gsXh/+xGgx7cNPZot3Tb9ZLOZOXc1qsWfRJCaLlauPMlm8az3HYjF7ejOTxZP1s5gt Jh26xmgxZVoTo8XeW9oWe/aeZLGYv+wpu8Xy4/+YLNa9fs9icf7vcVYHEY/LV7w9ds66y+5x /t5GFo/LZ0s9Nq3qZPPY9GkSu8fmJfUeu282sHl8fHqLxePwpkWsHu/3XWXzOLPgCFDydLXH 501yHpuevGUK4I/SsynKLy1JVcjILy6xVYo2tDDSM7S00DMysdQzNDaPtTIyVdK3s0lJzcks Sy3St0vQy7g6/z9bwQPOin0NxQ2M79m7GDk4JARMJI7tKe1i5OIQEljKKDF7z1rGLkZOoLiM xMYvV1khbGGJP9e62CCKPjJKfOrayASSEBLYwihx5a4XiM0ioCqxd/YvFhCbTUBfYtX2U2CD RASUJJ6+OssI0sws8J1dYvKNE2AJYQEDifffe9lAbF4BW4mZ6xaxQAxdziLR2msEEReUODnz CVicWcBCYub884wgVzMLSEss/8cBEuYU0Ja4++gVO8ShShKPX7yFeqBW4vPfZ4wTGIVnIZk0 C8mkWQiTFjAyr2IUSS0tzk3PLTbSK07MLS7NS9dLzs/dxAhMJduO/dyyg3Hlq496hxiZOBgP MUpwMCuJ8OouZE0X4k1JrKxKLcqPLyrNSS0+xGgKDIqJzFKiyfnAZJZXEm9oZmBqaGJmaWBq aWasJM7LduV8mpBAemJJanZqakFqEUwfEwenVANTWURI47xy3SfyZyU/JXxsrD4kc9h3l5DR 8wW17XNXXbc53LJzWcO03Dfv6vcIuH1ymxmzeMaKL23HfRgqpDUu9hw/f9aL+9m9LWsNvY0v L43jWHR40kbB42wX6t+ce7BgUc68miveObM/BOzwOxfkOYmvU11acbora9id8OvRpkV7ev/t uJ7vu1Gp97nC/t8cSWfmxfV6f3jy9p95fEzwlzt3Z7GVHO/ZE8I3e8fB/t/O8e7XLuzKbeSv Fpvz6sfGy/5OpQ36c5Rl1u4yPLHvRtLDE39/tLy7+8d/n5Qf216bhYFtN0Jfiv2ptA2R4FD9 r7tTWW3u5iVz+KR5OlbfdZWbssfhE0N6KrfE5dWyHEosxRmJhlrMRcWJAGrl7aGuAwAA X-CMS-MailID: 20241011122104eucas1p2f5cdb80296ef765dd2e4fda6797017de X-Msg-Generator: CA X-RootMTR: 20241010092019eucas1p157b87b63e91cd2294df4a8f8e2de4cdf X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20241010092019eucas1p157b87b63e91cd2294df4a8f8e2de4cdf References: <20241004123027.GA19168@lst.de> <20241007101011.boufh3tipewgvuao@ArmHalley.local> <97bd78a896b748b18e21e14511e8e0f4@CAMSVWEXC02.scsc.local> <20241010071327.rnh2wsuqdvcu2tx4@ArmHalley.local> <20241010092010.GC9287@lst.de> <20241010122232.r2omntepzkmtmx7p@ArmHalley.local> <20241011085631.GA4039@lst.de> On 11.10.2024 10:56, Christoph Hellwig wrote: >On Thu, Oct 10, 2024 at 02:22:32PM +0200, Javier Gonzalez wrote: >> Passthru is great for prototyping and getting insights on end-to-end >> applicability. We see though that it is difficult to get a full solution >> based on it, unless people implement a use-space layer tailored to their >> use-case (e.g., a version SPDK's bdev). After the POC phase, most folks >> that can use passthru prefer to move to block - with a validated >> use-case it should be easier to get things upstream. >> >> This is exactly where we are now. > >That's a lot of marketing babble :) What exact thing is missing >from the passthrough interface when using say spdx over io_uring? The block layer provides a lot of functionality that passthru cannot provide. A simple example would be splits. You know this :) I am sure Jens and Keith can give you more specifics on their particular reasons. > >> If you saw the comments from Christian on the inode space, there are a >> few plumbing challenges. Do you have any patches we could look at? > >I'm not sure what you refer to here. This from Christian: https://lore.kernel.org/all/20240903-erfassen-bandmitglieder-32dfaeee66b2@brauner/