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a=OOZaFjgC48PWsiFpTAqLcw==:17 a=6eWqkTHjU83fiwn7nKZWdM+Sl24=:19 a=z/mQ4Ysz8XfWz/Q5cLBRGdckG28=:19 a=lCpzRmAYbLLaTzLvsPZ7Mbvzbb8=:19 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=NGcC8JguVDcA:10 a=GoEa3M9JfhUA:10 a=VkNPw1HP01LnGYTKEx00:22 a=jiCTI4zE5U7BLdzWsZGv:22 a=o5oIOnhZENCTenyL_yNV:22 a=sKyGE1fn2-_buRAmUNwA:9 a=QEXdDO2ut3YA:10 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTExMDA4MiBTYWx0ZWRfXygLu6blH0vZD rKMQiXtG4wrnwuUwRXOk1smH5I/GV6W1R/0dt7LrvQI7Cj3XG+npFY876qGx/ybYF7IO3qyWSbC 12d2xPgQsbKZFJSsomroqmsdxQGTNynfYrWV9qotBE+qRjwebHZW4syvqvA44/x7V1owKyqqqdG rcgwLKte933L5Szm7UhK/K30NWDGNDAM/cV+2nZ6ahlJNO6QoAkeasGBlYOrzw4UiVWqmZAD2dx kYO326mLIPmlKH1XFbLr2586LEd+nbLcbLlKrnp1pABPFunhC0Tgxn3nRJMaef4z0wXUT+gle5r jFnk+GbTvm+h2/368n8iB6XGv20P0dpZMxdE2Te9+hSK1IqnVqmHXXlItAMQJGxnk4ScXhqyfPp vjSCFDA+VW1w0aHi1AZPuWwsLjh+a64xfeUQchrBoct23foVRb5DnKnHTCOGeZ7lLVEJUhumyiI ypaW6uoqN8hvAw3iR4w== On 10/05/2026 23:03, Sagi Grimberg wrote: >> Important new structures introduced include: >> >> - mpath_head >> These contain much of the multipath-specific functionality from >> nvme_ns_head, including a pointer to the gendisk structure and >> a path SRCU-based array. > > I think it should be placed first in its parent struct as it holds the > hot-path > head->srcu and head->list. > Yeah, I did originally try this. However it becomes a pain for managing the lifecycle of the mpath_head and nvme_ns_head/scsi_mpath_head structures, especially for the scenarios like the delayed head removal. However I can see again if I can make it work. >> >> - mpath_device >> This is the per-path structure, and contains much the same >> multipath-specific functionality in nvme_ns >> >> libmultipath provides functionality for path management, path selection, >> data path, and failover handling. >> >> Since the NVMe driver has some code in the sysfs and ioctl handling >> which iterate all multipath NSes, functions like mpath_call_for_device() >> are added to do the same per-path iteration. > > very nice, overall seems fairly straight forward. thanks a lot