Hello
The below WARNING was triggered on the target side after a connection
on 5.17.0-rc3, here is the full log, let me if you need any tests for
it, thanks
HW:
# lspci | grep -i mel
04:00.0 Infiniband controller: Mellanox Technologies MT27700 Family [ConnectX-4]
04:00.1 Infiniband controller: Mellanox Technologies MT27700 Family [ConnectX-4]
dmesg:
[ 514.481280] null_blk: module loaded
[ 523.597381] nvmet: adding nsid 1 to subsystem testnqn
[ 523.612212] nvmet_rdma: enabling port 2 (172.31.0.202:4420)
[ 525.520199] mlx5_ib0.8008: multicast join failed for
ff12:401b:8008:0000:0000:0000:ffff:ffff, status -22
[ 526.543740] mlx5_ib0.8016: multicast join failed for
ff12:401b:8016:0000:0000:0000:ffff:ffff, status -22
[ 540.633829] ======================================================
[ 540.640765] WARNING: possible circular locking dependency detected
[ 540.647709] 5.17.0-rc3.rc3.debug #3 Tainted: G S
[ 540.655117] ------------------------------------------------------
[ 540.662753] kworker/10:3/1152 is trying to acquire lock:
[ 540.669414] ffff88810005c548 ((wq_completion)events){+.+.}-{0:0},
at: flush_workqueue+0xe6/0x1400
[ 540.680127]
but task is already holding lock:
[ 540.688047] ffff8883914483e0
(&id_priv->handler_mutex/1){+.+.}-{3:3}, at:
cma_ib_req_handler+0x1709/0x4a60 [rdma_cm]
[ 540.700602]
which lock already depends on the new lock.
[ 540.712121]
the existing dependency chain (in reverse order) is:
[ 540.722123]
-> #10 (&id_priv->handler_mutex/1){+.+.}-{3:3}:
[ 540.731728] lock_acquire+0x1d2/0x5a0
[ 540.737298] __mutex_lock+0x155/0x15f0
[ 540.742975] cma_ib_req_handler+0x1709/0x4a60 [rdma_cm]
[ 540.750330] cm_process_work+0x47/0x190 [ib_cm]
[ 540.756928] cm_req_handler+0x2235/0x6fd0 [ib_cm]
[ 540.763727] cm_work_handler+0x1acf/0x4a30 [ib_cm]
[ 540.770637] process_one_work+0x97e/0x1700
[ 540.776770] worker_thread+0x87/0xb30
[ 540.782429] kthread+0x29d/0x340
[ 540.787609] ret_from_fork+0x22/0x30
[ 540.793186]
-> #9 (&id_priv->handler_mutex){+.+.}-{3:3}:
[ 540.802794] lock_acquire+0x1d2/0x5a0
[ 540.808510] __mutex_lock+0x155/0x15f0
[ 540.814331] cma_ib_req_handler+0xf86/0x4a60 [rdma_cm]
[ 540.821736] cm_process_work+0x47/0x190 [ib_cm]
[ 540.828477] cm_req_handler+0x2235/0x6fd0 [ib_cm]
[ 540.835424] cm_work_handler+0x1acf/0x4a30 [ib_cm]
[ 540.842485] process_one_work+0x97e/0x1700
[ 540.848768] worker_thread+0x87/0xb30
[ 540.854575] kthread+0x29d/0x340
[ 540.859903] ret_from_fork+0x22/0x30
[ 540.865628]
-> #8 ((work_completion)(&(&work->work)->work)){+.+.}-{0:0}:
[ 540.877103] lock_acquire+0x1d2/0x5a0
[ 540.882984] process_one_work+0x8dd/0x1700
[ 540.889364] worker_thread+0x87/0xb30
[ 540.895267] kthread+0x29d/0x340
[ 540.900688] ret_from_fork+0x22/0x30
[ 540.906509]
-> #7 ((wq_completion)ib_cm){+.+.}-{0:0}:
[ 540.916268] lock_acquire+0x1d2/0x5a0
[ 540.922155] flush_workqueue+0x109/0x1400
[ 540.928418] cm_remove_one+0x31d/0x560 [ib_cm]
[ 540.935164] remove_client_context+0xa9/0xf0 [ib_core]
[ 540.942712] disable_device+0x12d/0x210 [ib_core]
[ 540.949754] __ib_unregister_device+0x80/0x160 [ib_core]
[ 540.957456] ib_unregister_device+0x21/0x30 [ib_core]
[ 540.964844] __mlx5_ib_remove+0x88/0xe0 [mlx5_ib]
[ 540.971848] auxiliary_bus_remove+0x55/0x80
[ 540.978213] device_release_driver_internal+0x1e5/0x4a0
[ 540.985713] bus_remove_device+0x2a9/0x570
[ 540.991936] device_del+0x54a/0xd10
[ 540.997483] mlx5_rescan_drivers_locked+0x1d4/0x830 [mlx5_core]
[ 541.005879] mlx5_lag_remove_devices+0xcb/0x110 [mlx5_core]
[ 541.013867] mlx5_do_bond_work+0x83c/0xf00 [mlx5_core]
[ 541.021361] process_one_work+0x97e/0x1700
[ 541.027611] worker_thread+0x87/0xb30
[ 541.033361] kthread+0x29d/0x340
[ 541.038627] ret_from_fork+0x22/0x30
[ 541.044272]
-> #6 (&device->unregistration_lock){+.+.}-{3:3}:
[ 541.054465] lock_acquire+0x1d2/0x5a0
[ 541.060212] __mutex_lock+0x155/0x15f0
[ 541.066050] __ib_unregister_device+0x24/0x160 [ib_core]
[ 541.073675] ib_unregister_device+0x21/0x30 [ib_core]
[ 541.081015] __mlx5_ib_remove+0x88/0xe0 [mlx5_ib]
[ 541.087966] auxiliary_bus_remove+0x55/0x80
[ 541.094325] device_release_driver_internal+0x1e5/0x4a0
[ 541.101856] bus_remove_device+0x2a9/0x570
[ 541.108117] device_del+0x54a/0xd10
[ 541.113701] mlx5_rescan_drivers_locked+0x1d4/0x830 [mlx5_core]
[ 541.122096] mlx5_lag_remove_devices+0xcb/0x110 [mlx5_core]
[ 541.130104] mlx5_do_bond_work+0x83c/0xf00 [mlx5_core]
[ 541.137619] process_one_work+0x97e/0x1700
[ 541.143899] worker_thread+0x87/0xb30
[ 541.149689] kthread+0x29d/0x340
[ 541.154988] ret_from_fork+0x22/0x30
[ 541.160678]
-> #5 (&esw->mode_lock_key#2){+.+.}-{3:3}:
[ 541.170295] lock_acquire+0x1d2/0x5a0
[ 541.176080] down_write+0x9e/0x3d0
[ 541.181554] mlx5_do_bond_work+0x15e/0xf00 [mlx5_core]
[ 541.189061] process_one_work+0x97e/0x1700
[ 541.195329] worker_thread+0x87/0xb30
[ 541.201111] kthread+0x29d/0x340
[ 541.206407] ret_from_fork+0x22/0x30
[ 541.212091]
-> #4 (&esw->mode_lock_key){+.+.}-{3:3}:
[ 541.221482] lock_acquire+0x1d2/0x5a0
[ 541.227261] down_write+0x9e/0x3d0
[ 541.232734] mlx5_do_bond_work+0x129/0xf00 [mlx5_core]
[ 541.240242] process_one_work+0x97e/0x1700
[ 541.246503] worker_thread+0x87/0xb30
[ 541.252268] kthread+0x29d/0x340
[ 541.257537] ret_from_fork+0x22/0x30
[ 541.263177]
-> #3 (mlx5_intf_mutex){+.+.}-{3:3}:
[ 541.272098] lock_acquire+0x1d2/0x5a0
[ 541.277828] __mutex_lock+0x155/0x15f0
[ 541.283653] mlx5_lag_add_mdev+0x36/0x610 [mlx5_core]
[ 541.291011] mlx5_load+0x1b6/0x240 [mlx5_core]
[ 541.297671] mlx5_init_one+0x337/0x470 [mlx5_core]
[ 541.304713] probe_one+0x412/0x5f0 [mlx5_core]
[ 541.311366] local_pci_probe+0xde/0x170
[ 541.317274] work_for_cpu_fn+0x51/0xa0
[ 541.323084] process_one_work+0x97e/0x1700
[ 541.329286] worker_thread+0x538/0xb30
[ 541.335100] kthread+0x29d/0x340
[ 541.340309] ret_from_fork+0x22/0x30
[ 541.345905]
-> #2 (&dev->intf_state_mutex){+.+.}-{3:3}:
[ 541.355423] lock_acquire+0x1d2/0x5a0
[ 541.361115] __mutex_lock+0x155/0x15f0
[ 541.366885] mlx5_init_one+0x2e/0x470 [mlx5_core]
[ 541.373799] probe_one+0x412/0x5f0 [mlx5_core]
[ 541.380421] local_pci_probe+0xde/0x170
[ 541.386286] work_for_cpu_fn+0x51/0xa0
[ 541.392052] process_one_work+0x97e/0x1700
[ 541.398195] worker_thread+0x538/0xb30
[ 541.403930] kthread+0x29d/0x340
[ 541.409083] ret_from_fork+0x22/0x30
[ 541.414615]
-> #1 ((work_completion)(&wfc.work)){+.+.}-{0:0}:
[ 541.424600] lock_acquire+0x1d2/0x5a0
[ 541.430253] process_one_work+0x8dd/0x1700
[ 541.436396] worker_thread+0x87/0xb30
[ 541.442049] kthread+0x29d/0x340
[ 541.447204] ret_from_fork+0x22/0x30
[ 541.452748]
-> #0 ((wq_completion)events){+.+.}-{0:0}:
[ 541.462048] check_prevs_add+0x3fd/0x2480
[ 541.468075] __lock_acquire+0x2402/0x2fa0
[ 541.474100] lock_acquire+0x1d2/0x5a0
[ 541.479739] flush_workqueue+0x109/0x1400
[ 541.485770] nvmet_rdma_queue_connect+0x1c79/0x2610 [nvmet_rdma]
[ 541.494059] cma_cm_event_handler+0xf2/0x530 [rdma_cm]
[ 541.501382] cma_ib_req_handler+0x1a76/0x4a60 [rdma_cm]
[ 541.508809] cm_process_work+0x47/0x190 [ib_cm]
[ 541.515456] cm_req_handler+0x2235/0x6fd0 [ib_cm]
[ 541.522294] cm_work_handler+0x1acf/0x4a30 [ib_cm]
[ 541.529225] process_one_work+0x97e/0x1700
[ 541.535380] worker_thread+0x87/0xb30
[ 541.541050] kthread+0x29d/0x340
[ 541.546235] ret_from_fork+0x22/0x30
[ 541.551807]
other info that might help us debug this:
[ 541.563694] Chain exists of:
(wq_completion)events --> &id_priv->handler_mutex -->
&id_priv->handler_mutex/1
[ 541.581095] Possible unsafe locking scenario:
[ 541.589747] CPU0 CPU1
[ 541.595828] ---- ----
[ 541.601891] lock(&id_priv->handler_mutex/1);
[ 541.607873] lock(&id_priv->handler_mutex);
[ 541.616508] lock(&id_priv->handler_mutex/1);
[ 541.625321] lock((wq_completion)events);
[ 541.630935]
*** DEADLOCK ***
[ 541.640567] 4 locks held by kworker/10:3/1152:
[ 541.646535] #0: ffff8891339a0548
((wq_completion)ib_cm){+.+.}-{0:0}, at: process_one_work+0x857/0x1700
[ 541.658114] #1: ffff88832ebcfe08
((work_completion)(&(&work->work)->work)){+.+.}-{0:0}, at:
process_one_work+0x88b/0x1700
[ 541.671586] #2: ffff8884081a53e0
(&id_priv->handler_mutex){+.+.}-{3:3}, at:
cma_ib_req_handler+0xf86/0x4a60 [rdma_cm]
[ 541.684712] #3: ffff8883914483e0
(&id_priv->handler_mutex/1){+.+.}-{3:3}, at:
cma_ib_req_handler+0x1709/0x4a60 [rdma_cm]
[ 541.698155]
stack backtrace:
[ 541.705358] CPU: 10 PID: 1152 Comm: kworker/10:3 Tainted: G S
5.17.0-rc3.rc3.debug #3
[ 541.716799] Hardware name: Dell Inc. PowerEdge R430/03XKDV, BIOS
1.6.2 01/08/2016
[ 541.726409] Workqueue: ib_cm cm_work_handler [ib_cm]
[ 541.733209] Call Trace:
[ 541.737175] <TASK>
[ 541.740741] dump_stack_lvl+0x44/0x57
[ 541.746073] check_noncircular+0x280/0x320
[ 541.751889] ? lock_chain_count+0x20/0x20
[ 541.757611] ? print_circular_bug.isra.47+0x430/0x430
[ 541.764505] ? mark_lock.part.52+0x107/0x1210
[ 541.770616] ? mark_lock.part.52+0x107/0x1210
[ 541.776715] ? lock_chain_count+0x20/0x20
[ 541.782423] ? lock_chain_count+0x20/0x20
[ 541.788118] check_prevs_add+0x3fd/0x2480
[ 541.793800] ? sched_clock_cpu+0x15/0x200
[ 541.799470] ? check_irq_usage+0xb50/0xb50
[ 541.805226] ? lockdep_lock+0xcb/0x1c0
[ 541.810587] ? static_obj+0xc0/0xc0
[ 541.815649] ? sched_clock_cpu+0x15/0x200
[ 541.821295] __lock_acquire+0x2402/0x2fa0
[ 541.826930] ? rcu_read_lock_bh_held+0xc0/0xc0
[ 541.833061] lock_acquire+0x1d2/0x5a0
[ 541.838316] ? flush_workqueue+0xe6/0x1400
[ 541.844066] ? rcu_read_unlock+0x50/0x50
[ 541.849618] ? lockdep_init_map_type+0x2f8/0x7f0
[ 541.855950] ? lockdep_init_map_type+0x2f8/0x7f0
[ 541.862267] flush_workqueue+0x109/0x1400
[ 541.867898] ? flush_workqueue+0xe6/0x1400
[ 541.873610] ? rdma_create_qp+0x423/0x6d0 [rdma_cm]
[ 541.880188] ? nvmet_rdma_create_queue_ib+0x7e1/0xa90 [nvmet_rdma]
[ 541.888236] ? check_flush_dependency+0x410/0x410
[ 541.894638] ? _raw_spin_unlock_irqrestore+0x3b/0x50
[ 541.901348] ? nvmet_rdma_queue_connect+0x1c79/0x2610 [nvmet_rdma]
[ 541.909442] nvmet_rdma_queue_connect+0x1c79/0x2610 [nvmet_rdma]
[ 541.917357] ? nvmet_rdma_alloc_cmds+0xd80/0xd80 [nvmet_rdma]
[ 541.924970] ? sched_clock_cpu+0x15/0x200
[ 541.930652] ? find_held_lock+0x3a/0x1c0
[ 541.936219] ? lock_release+0x42f/0xc90
[ 541.941685] ? lock_downgrade+0x6b0/0x6b0
[ 541.947350] ? lock_is_held_type+0xd9/0x130
[ 541.953219] ? rcu_read_lock_sched_held+0xaf/0xe0
[ 541.959673] ? rdma_find_gid+0x3d0/0x3d0 [ib_core]
[ 541.966219] ? rcu_read_lock_bh_held+0xc0/0xc0
[ 541.972318] ? lock_is_held_type+0xd9/0x130
[ 541.978088] cma_cm_event_handler+0xf2/0x530 [rdma_cm]
[ 541.984922] cma_ib_req_handler+0x1a76/0x4a60 [rdma_cm]
[ 541.991815] ? stack_trace_save+0x8a/0xb0
[ 541.997355] ? addr_handler+0x2a0/0x2a0 [rdma_cm]
[ 542.003658] ? alloc_list_entry+0x156/0x2c0
[ 542.009343] ? mark_lock.part.52+0x107/0x1210
[ 542.015202] ? lock_is_held_type+0xd9/0x130
[ 542.020871] ? cm_process_work+0x47/0x190 [ib_cm]
[ 542.027130] cm_process_work+0x47/0x190 [ib_cm]
[ 542.033200] ? _raw_spin_unlock+0x29/0x40
[ 542.038683] cm_req_handler+0x2235/0x6fd0 [ib_cm]
[ 542.044947] ? check_irq_usage+0xb50/0xb50
[ 542.050528] ? lockdep_lock+0xcb/0x1c0
[ 542.055716] ? cm_rep_handler+0x2440/0x2440 [ib_cm]
[ 542.062199] cm_work_handler+0x1acf/0x4a30 [ib_cm]
[ 542.068590] ? lock_is_held_type+0xd9/0x130
[ 542.074307] ? cm_req_handler+0x6fd0/0x6fd0 [ib_cm]
[ 542.080815] ? rcu_read_lock_sched_held+0xaf/0xe0
[ 542.087126] ? rcu_read_lock_bh_held+0xc0/0xc0
[ 542.093144] process_one_work+0x97e/0x1700
[ 542.098777] ? pwq_dec_nr_in_flight+0x270/0x270
[ 542.104902] worker_thread+0x87/0xb30
[ 542.110056] ? __kthread_parkme+0xc3/0x1d0
[ 542.115698] ? process_one_work+0x1700/0x1700
[ 542.121627] kthread+0x29d/0x340
[ 542.126279] ? kthread_complete_and_exit+0x20/0x20
[ 542.132702] ret_from_fork+0x22/0x30
[ 542.137771] </TASK>
[ 542.192405] nvmet: creating nvm controller 1 for subsystem testnqn
for NQN nqn.2014-08.org.nvmexpress:uuid:4c4c4544-0056-4c10-8058-b7c04f383432.
[ 546.991610] DMA-API: dma_debug_entry pool grown to 2162688 (3300%)
--
Best Regards,
Yi Zhang
