Hi I found this issue on 5.13-rc2 with NVMe/IB environment, could anyone help check it? Thanks. $ time echo 1 >/sys/block/nvme0n1/device/reset_controller real 0m10.678s user 0m0.000s sys 0m0.000s $ time echo 1 >/sys/block/nvme0n1/device/reset_controller real 1m11.530s user 0m0.000s sys 0m0.000s target: $ dmesg | grep nvme [ 276.891454] nvmet: creating controller 1 for subsystem testnqn for NQN nqn.2014-08.org.nvmexpress:uuid:4c4c4544-0056-4c10-8058-b7c04f383432. [ 287.374412] nvmet: ctrl 1 keep-alive timer (5 seconds) expired! [ 287.399317] nvmet: ctrl 1 fatal error occurred! [ 348.412672] nvmet: creating controller 1 for subsystem testnqn for NQN nqn.2014-08.org.nvmexpress:uuid:4c4c4544-0056-4c10-8058-b7c04f383432. client: $ dmesg | grep nvme [ 281.704475] nvme nvme0: creating 40 I/O queues. [ 285.557759] nvme nvme0: mapped 40/0/0 default/read/poll queues. [ 353.187809] nvme nvme0: I/O 8 QID 0 timeout [ 353.193100] nvme nvme0: Property Set error: 881, offset 0x14 [ 353.226082] nvme nvme0: creating 40 I/O queues. [ 357.088266] nvme nvme0: mapped 40/0/0 default/read/poll queues. -- Best Regards, Yi Zhang