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These tests reproduce each case > and verify the fix. > > Queue mapping bugs, fixed in mainline: > > nvme/076 More write and poll queues than online CPUs requested. A > queue type got more hardware contexts than online CPUs, a > hardware context without CPU failed its Connect command with > -EXDEV. Fixed by 99fd0cbae849 ("nvme-fabrics: limit each > queue type to the number of online CPUs"). > nvme/077 No queues left for polling. The poll map kept the default > mapping, the queue claimed poll support and polled I/O went > to a queue which isn't a poll queue. Fixed by 36ede1aa85d5 > ("nvme-fabrics: clear the poll map if no poll queues are > mapped"). > nvme/078 Reconnect with fewer I/O queues. Stale io_queues entries > mapped the poll queues beyond the hardware contexts and > blk_mq_map_swqueue crashed. Fixed by 9588769af5fc > ("nvme-fabrics: reset io_queues before computing the queue > mapping") and 36ede1aa85d5. Daniel, thanks for the v2 patch. I applied the first three patches for the test cases above. Please note that I renumbered them to nvme/078-080. The other three patches look good. IIUC, they depend on another kernel patch [*]. I would like to wait for it applied, then take another look on them. [*] https://lore.kernel.org/linux-block/20261104-nvme-fabrics-isolcpu-v3-1-41953b5dfba0@suse.de/