Hello I hit this issue when I was running blktests nvme/tcp nvme/060 on the latest linux-block/for-next with rt enabled, please help check it and let me know if you need any info/testing for it, thanks. [ 195.356104] run blktests nvme/060 at 2025-08-06 01:50:45 [ 195.578659] loop0: detected capacity change from 0 to 2097152 [ 195.620986] nvmet: adding nsid 1 to subsystem blktests-subsystem-1 [ 195.681508] nvmet_tcp: enabling port 0 (127.0.0.1:4420) [ 195.904991] nvmet: Created nvm controller 1 for subsystem blktests-subsystem-1 for NQN nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349. [ 195.919199] nvme nvme1: creating 80 I/O queues. [ 196.035295] nvme nvme1: mapped 80/0/0 default/read/poll queues. [ 196.175655] nvme nvme1: new ctrl: NQN "blktests-subsystem-1", addr 127.0.0.1:4420, hostnqn: nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349 [ 196.195731] nvme (3558) used greatest stack depth: 19248 bytes left [ 197.786460] nvmet: ctrl 1 fatal error occurred! [ 197.789337] nvme nvme1: starting error recovery [ 197.932751] nvme nvme1: Reconnecting in 1 seconds... [ 198.980348] nvmet: Created nvm controller 1 for subsystem blktests-subsystem-1 for NQN nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349. [ 198.985848] nvme nvme1: creating 80 I/O queues. [ 199.318924] nvme nvme1: mapped 80/0/0 default/read/poll queues. [ 199.423818] nvme nvme1: Removing ctrl: NQN "blktests-subsystem-1" [ 199.556572] nvme nvme1: Failed reconnect attempt 1/600 [ 200.075342] systemd-udevd (3501) used greatest stack depth: 17888 bytes left [ 200.496781] nvme nvme1: Property Set error: 880, offset 0x14 [ 200.977968] nvmet: Created nvm controller 1 for subsystem blktests-subsystem-1 for NQN nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349. [ 200.985964] nvme nvme1: creating 80 I/O queues. [ 201.076602] nvme nvme1: mapped 80/0/0 default/read/poll queues. [ 201.189249] nvme nvme1: new ctrl: NQN "blktests-subsystem-1", addr 127.0.0.1:4420, hostnqn: nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349 [ 201.206511] nvme (3741) used greatest stack depth: 17712 bytes left [ 201.867978] nvmet: ctrl 1 fatal error occurred! [ 201.868127] nvme nvme1: starting error recovery [ 201.986566] nvme nvme1: Reconnecting in 1 seconds... [ 203.049519] nvmet: Created nvm controller 1 for subsystem blktests-subsystem-1 for NQN nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349. [ 203.056878] nvme nvme1: creating 80 I/O queues. [ 203.399239] nvme nvme1: mapped 80/0/0 default/read/poll queues. [ 203.569429] nvme nvme1: Successfully reconnected (attempt 1/600) [ 203.918129] nvmet: ctrl 1 fatal error occurred! [ 203.918261] nvme nvme1: starting error recovery [ 204.026795] nvme nvme1: Reconnecting in 1 seconds... [ 204.423104] nvme nvme1: Removing ctrl: NQN "blktests-subsystem-1" [ 205.336507] nvme nvme1: Property Set error: 880, offset 0x14 [ 205.855722] nvmet: Created nvm controller 1 for subsystem blktests-subsystem-1 for NQN nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349. [ 205.861038] nvme nvme1: creating 80 I/O queues. [ 205.944537] nvme nvme1: mapped 80/0/0 default/read/poll queues. [ 205.965862] nvmet: ctrl 1 fatal error occurred! [ 206.053046] nvme nvme1: starting error recovery [ 206.147337] nvme nvme1: Failed to configure AEN (cfg 900) [ 206.147495] nvme nvme1: new ctrl: NQN "blktests-subsystem-1", addr 127.0.0.1:4420, hostnqn: nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349 [ 206.176163] nvme nvme1: Reconnecting in 1 seconds... [ 207.208170] nvmet: Created nvm controller 1 for subsystem blktests-subsystem-1 for NQN nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349. [ 207.211901] nvme nvme1: creating 80 I/O queues. [ 207.336799] nvme nvme1: mapped 80/0/0 default/read/poll queues. [ 207.349663] nvme nvme1: Successfully reconnected (attempt 1/600) [ 208.017068] nvmet: ctrl 1 fatal error occurred! [ 208.017201] nvme nvme1: starting error recovery [ 208.126889] nvme nvme1: Reconnecting in 1 seconds... [ 209.199440] nvmet: Created nvm controller 1 for subsystem blktests-subsystem-1 for NQN nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349. [ 209.203685] nvme nvme1: creating 80 I/O queues. [ 209.382909] nvme nvme1: Removing ctrl: NQN "blktests-subsystem-1" [ 209.503420] nvme nvme1: mapped 80/0/0 default/read/poll queues. [ 209.706412] nvme nvme1: Failed reconnect attempt 1/600 [ 210.617622] nvme nvme1: Property Set error: 880, offset 0x14 [ 211.158138] nvmet: Created nvm controller 1 for subsystem blktests-subsystem-1 for NQN nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349. [ 211.163794] nvme nvme1: creating 80 I/O queues. [ 211.245927] nvme nvme1: mapped 80/0/0 default/read/poll queues. [ 211.350477] nvme nvme1: new ctrl: NQN "blktests-subsystem-1", addr 127.0.0.1:4420, hostnqn: nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349 [ 212.097987] nvmet: ctrl 1 fatal error occurred! [ 212.098122] nvme nvme1: starting error recovery [ 212.217345] nvme nvme1: Reconnecting in 1 seconds... [ 213.280774] nvmet: Created nvm controller 1 for subsystem blktests-subsystem-1 for NQN nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349. [ 213.284617] nvme nvme1: creating 80 I/O queues. [ 213.625320] nvme nvme1: mapped 80/0/0 default/read/poll queues. [ 213.787167] nvme nvme1: Successfully reconnected (attempt 1/600) [ 214.147984] nvmet: ctrl 1 fatal error occurred! [ 214.148113] nvme nvme1: starting error recovery [ 214.248455] nvme nvme1: Reconnecting in 1 seconds... [ 214.604818] nvme nvme1: Removing ctrl: NQN "blktests-subsystem-1" [ 215.431717] nvme nvme1: Property Set error: 880, offset 0x14 [ 216.014626] nvmet: Created nvm controller 1 for subsystem blktests-subsystem-1 for NQN nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349. [ 216.020186] nvme nvme1: creating 80 I/O queues. [ 216.101613] nvme nvme1: mapped 80/0/0 default/read/poll queues. [ 216.195783] nvmet: ctrl 1 fatal error occurred! [ 216.536582] nvme nvme1: failed to send request -32 [ 216.537991] nvme nvme1: failed nvme_keep_alive_end_io error=4 [ 280.196270] nvme nvme1: I/O tag 0 (0000) type 4 opcode 0x7f (Fabrics Cmd) QID 80 timeout [ 280.198058] nvme nvme1: Connect command failed, error wo/DNR bit: 881 [ 280.198353] nvme nvme1: failed to connect queue: 80 ret=881 [ 285.369827] nvmet: Created nvm controller 1 for subsystem blktests-subsystem-1 for NQN nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349. [ 285.375603] nvme nvme1: creating 80 I/O queues. [ 285.449676] nvme nvme1: mapped 80/0/0 default/read/poll queues. [ 285.554119] nvme nvme1: new ctrl: NQN "blktests-subsystem-1", addr 127.0.0.1:4420, hostnqn: nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349 [ 287.344206] nvmet: ctrl 1 fatal error occurred! [ 287.344349] nvme nvme1: starting error recovery [ 287.466244] nvme nvme1: Reconnecting in 1 seconds... [ 288.479300] nvmet: Created nvm controller 1 for subsystem blktests-subsystem-1 for NQN nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349. [ 288.483283] nvme nvme1: creating 80 I/O queues. [ 288.785415] nvme nvme1: Removing ctrl: NQN "blktests-subsystem-1" [ 288.856766] nvme nvme1: mapped 80/0/0 default/read/poll queues. [ 289.066215] nvme nvme1: Failed reconnect attempt 1/600 [ 290.116265] nvme nvme1: Property Set error: 880, offset 0x14 [ 320.802045] loop: module loaded [ 321.017366] run blktests nvme/060 at 2025-08-06 01:52:51 [ 321.220243] loop0: detected capacity change from 0 to 2097152 [ 321.262034] nvmet: adding nsid 1 to subsystem blktests-subsystem-1 [ 321.322296] nvmet_tcp: enabling port 0 (127.0.0.1:4420) [ 321.511316] nvmet: Created nvm controller 1 for subsystem blktests-subsystem-1 for NQN nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349. [ 321.524993] nvme nvme1: creating 80 I/O queues. [ 321.636336] nvme nvme1: mapped 80/0/0 default/read/poll queues. [ 321.754764] nvme nvme1: new ctrl: NQN "blktests-subsystem-1", addr 127.0.0.1:4420, hostnqn: nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349 [ 323.431491] nvmet: ctrl 1 fatal error occurred! [ 323.434219] nvme nvme1: starting error recovery [ 323.566948] nvme nvme1: Reconnecting in 1 seconds... [ 324.653738] nvmet: Created nvm controller 1 for subsystem blktests-subsystem-1 for NQN nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349. [ 324.662270] nvme nvme1: creating 80 I/O queues. [ 324.993712] nvme nvme1: Removing ctrl: NQN "blktests-subsystem-1" [ 325.052085] nvme nvme1: mapped 80/0/0 default/read/poll queues. [ 325.481710] nvmet: ctrl 1 fatal error occurred! [ 327.286111] nvmet: ctrl 1 keep-alive timer (1 seconds) expired! [ 390.435380] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 390.441500] rcu: Tasks blocked on level-1 rcu_node (CPUs 0-15): P4784/2:b..l P1049/8:b..l [ 390.449771] rcu: (detected by 13, t=6503 jiffies, g=8845, q=2243 ncpus=80) [ 390.456724] task:kworker/u329:1 state:D stack:19264 pid:1049 tgid:1049 ppid:2 task_flags:0x4208060 flags:0x00000010 [ 390.467850] Workqueue: nvme-wq nvme_tcp_reconnect_ctrl_work [nvme_tcp] [ 390.474378] Call trace: [ 390.476813] __switch_to+0x1d8/0x330 (T) [ 390.480731] __schedule+0x860/0x1c30 [ 390.484297] schedule_rtlock+0x30/0x70 [ 390.488037] rtlock_slowlock_locked+0x464/0xf60 [ 390.492559] rt_read_lock+0x2bc/0x3e0 [ 390.496211] nvmet_tcp_listen_data_ready+0x3c/0x118 [nvmet_tcp] [ 390.502125] nvmet_tcp_data_ready+0x88/0x198 [nvmet_tcp] [ 390.507429] tcp_data_ready+0xdc/0x3e0 [ 390.511171] tcp_data_queue+0xe30/0x1e08 [ 390.515084] tcp_rcv_established+0x710/0x2328 [ 390.519432] tcp_v4_do_rcv+0x554/0x940 [ 390.523172] tcp_v4_rcv+0x1ec4/0x3078 [ 390.526825] ip_protocol_deliver_rcu+0xc0/0x3f0 [ 390.531347] ip_local_deliver_finish+0x2d4/0x5c0 [ 390.535954] ip_local_deliver+0x17c/0x3c0 [ 390.539953] ip_rcv_finish+0x148/0x238 [ 390.543693] ip_rcv+0xd0/0x2e0 [ 390.546737] __netif_receive_skb_one_core+0x100/0x180 [ 390.551780] __netif_receive_skb+0x2c/0x160 [ 390.555953] process_backlog+0x230/0x6f8 [ 390.559866] __napi_poll.constprop.0+0x9c/0x3e8 [ 390.564386] net_rx_action+0x808/0xb50 [ 390.568125] handle_softirqs.constprop.0+0x23c/0xca0 [ 390.573082] __local_bh_enable_ip+0x260/0x4f0 [ 390.577429] __dev_queue_xmit+0x6f4/0x1bd8 [ 390.581515] neigh_hh_output+0x190/0x2c0 [ 390.585429] ip_finish_output2+0x7c8/0x1788 [ 390.589602] __ip_finish_output+0x2c4/0x4f8 [ 390.593776] ip_finish_output+0x3c/0x2a8 [ 390.597689] ip_output+0x154/0x418 [ 390.601081] __ip_queue_xmit+0x580/0x1108 [ 390.605081] ip_queue_xmit+0x4c/0x78 [ 390.608647] __tcp_transmit_skb+0xfac/0x24e8 [ 390.612908] tcp_write_xmit+0xbec/0x3078 [ 390.616821] __tcp_push_pending_frames+0x90/0x2b8 [ 390.621515] tcp_send_fin+0x108/0x9a8 [ 390.625167] tcp_shutdown+0xd8/0xf8 [ 390.628646] inet_shutdown+0x14c/0x2e8 [ 390.632385] kernel_sock_shutdown+0x5c/0x98 [ 390.636560] __nvme_tcp_stop_queue+0x44/0x220 [nvme_tcp] [ 390.641865] nvme_tcp_stop_queue_nowait+0x130/0x200 [nvme_tcp] [ 390.647691] nvme_tcp_setup_ctrl+0x3bc/0x728 [nvme_tcp] [ 390.652909] nvme_tcp_reconnect_ctrl_work+0x78/0x290 [nvme_tcp] [ 390.658822] process_one_work+0x80c/0x1a78 [ 390.662910] worker_thread+0x6d0/0xaa8 [ 390.666650] kthread+0x304/0x3a0 [ 390.669869] ret_from_fork+0x10/0x20 [ 390.673437] task:kworker/u322:77 state:D stack:27184 pid:4784 tgid:4784 ppid:2 task_flags:0x4208060 flags:0x00000210 [ 390.684562] Workqueue: nvmet-wq nvmet_tcp_release_queue_work [nvmet_tcp] [ 390.691256] Call trace: [ 390.693692] __switch_to+0x1d8/0x330 (T) [ 390.697605] __schedule+0x860/0x1c30 [ 390.701171] schedule_rtlock+0x30/0x70 [ 390.704911] rwbase_write_lock.constprop.0.isra.0+0x2fc/0xb30 [ 390.710646] rt_write_lock+0x9c/0x138 [ 390.714299] nvmet_tcp_release_queue_work+0x168/0xb48 [nvmet_tcp] [ 390.720384] process_one_work+0x80c/0x1a78 [ 390.724470] worker_thread+0x6d0/0xaa8 [ 390.728210] kthread+0x304/0x3a0 [ 390.731428] ret_from_fork+0x10/0x20 -- Best Regards, Yi Zhang
