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Wed, 12 Jun 2024 09:46:41 -0400 (EDT) Message-ID: <1a5c214c-db14-42a4-8415-ab2c90a04917@fastmail.fm> Date: Wed, 12 Jun 2024 15:46:40 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH RFC v2 00/19] fuse: fuse-over-io-uring To: Bernd Schubert , Miklos Szeredi Cc: Amir Goldstein , "linux-fsdevel@vger.kernel.org" , Andrew Morton , "linux-mm@kvack.org" , Ingo Molnar , Peter Zijlstra , Andrei Vagin , "io-uring@vger.kernel.org" , Kent Overstreet References: <20240529-fuse-uring-for-6-9-rfc2-out-v1-0-d149476b1d65@ddn.com> <99d13ae4-8250-4308-b86d-14abd1de2867@fastmail.fm> <62ecc4cf-97c8-43e6-84a1-72feddf07d29@fastmail.fm> <0615e79d-9397-48eb-b89e-f0be1d814baf@ddn.com> From: Bernd Schubert Content-Language: en-US In-Reply-To: <0615e79d-9397-48eb-b89e-f0be1d814baf@ddn.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Stat-Signature: oo99sk53s35tmtnx5ijdb5xrmnawp8z4 X-Rspamd-Queue-Id: 31AC4C0024 X-Rspam-User: X-Rspamd-Server: rspam06 X-HE-Tag: 1718200004-134003 X-HE-Meta: U2FsdGVkX1/KONfIOlj30WA88Grxw86SorlLH4cwl7XfAelYIXOtR6ZWjJ8pg+rKrvLtEqfPnUsjrAJC/Lv1Z75FESpTjEgsbdv6M4s+OHlc6Z4JPL4e6LgMgQy73stqwUNHa1biGF3AVTEYYa+t/nz4WGMo2HQpWfOPw8Ovl0VqTXKfDkJHEHAzzHQO2z81YKbrNnTvDJ4a11jEg0YV5VHiTmoGnXDid4cwW906XwxLtmpQxUWGTzWzP8NKc/QVq20ZIT/GZyIdsN+KpPM+1BS93GA6cMa6zYe0sgYoZbCJUEjZMXg02im+W7OQA099pMUHmuI6zh0MCxR83m8nElSTPC1F8MKQHY1ayMQUTvNPzd7x1ujmgfHRHW/pxlruhUEeGurnF6o5a/fDAur4l/W8KwWGZzibnjdWvBcx4Fr10joCdhLMs+qZ88eUsakJNMmPFxpojxMqPz7TIweqxax9yJfrCpOn8z0XbIYhT0DxdFUpt1+j237mqvIQ4sDdvDHww+W7CMzKJoQbviQQmbLzwsPxGW5A1PSHT5Ad2/giqFlPus32y62pN/ExbU4fNNfdbOu92UnBsXFOds1QCKbwnZlHNzrXo354DTWDn3gb5Er8lFhBUFbQaVun39aeQeYW6TgPrW8/iQbjIuXm/k0qG8GBbRaojhsSA3cKs5OaDwqoF+CI7bkGAviL/kWXqhumVvIkHegYaUCKs1HGdv7pc35v9R0ElMAPvCcwfL+DZPf7XGb63qT5zX8xKW27nHjQ+CA+jNDEvwLo/jFo/cp9/75zkLa3i8atqniejqo67cL/AJ6zKJ06CkNAMrA9S40S0xggOJ89a5V93s9x255wb2yd5iULof8GGCk2xAWCjEMBepLeeWGYrMBneuNUNYsbuhexoPH/9ZnDs0+LoZfQWRXSqSqtW6HvSU+DMa8jHlnsuFzNF/rERyVnsfaqSXYswSze1dUp9ZcGULQ fdRp7l0U eRXNiDp3VK+C0qC5n8sCuKcqoHUkIuBJJ3En7zA8YVOWfl74veMzijpmmzA05AInBNlLPGKoWVTsSLB50PMPBTXWqx0UR8upI24DcWhZWDsUqYGYhEmCGjw8qn63a8RxWZiSDYHztumew6NcYTec70Ve+u9/XmLhijXdifdvfm2ldsFIkdRF5lhiVAkKWPpsyjLbL2CZmO+TwwkYCTnqHoQjHjWH0xdmSj8wguVlUPp4KUGEk+DijImIdZYCGxBXw7BJNnTmIqDbfdh7GGNBjeLf8rOudFP+swBvBlUsjRL2kj6nhSqigxL8UrQZBolREdW0JZSMANDp1ryvgzfoMjQ8sJQ== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 6/12/24 15:32, Bernd Schubert wrote: > On 6/12/24 09:39, Miklos Szeredi wrote: >>> Personally I don't see anything twisted here, one just needs to >>> understand that IORING_OP_URING_CMD was written for that reverse order. >> >> That's just my gut feeling. fuse/dev_uring.c is 1233 in this RFC. >> And that's just the queuing. > Btw, counting lines, majority of that is not queuing and handling requests, but setting up things, shutdown (start/stop is already almost half of the file) and then and doing sanity checks, as in fuse_uring_get_verify_queue().