【olk-5.10】nfs4_callback_compound hungtask

INFO: task NFSv4 callback:93188 blocked for more than 1310 seconds.
      Not tainted 5.10.0-00574-gc310db27923f-dirty #16
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:NFSv4 callback  state:D stack:    0 pid:93188 ppid:     2 flags:0x00000208
Call trace:
 __switch_to+0x98/0xdc arch/arm64/kernel/process.c:639
 context_switch kernel/sched/core.c:4055 [inline]
 __schedule+0x690/0xf0c kernel/sched/core.c:5003
 schedule+0xd8/0x220 kernel/sched/core.c:5139
 schedule_timeout+0x390/0x42c kernel/time/timer.c:2126
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common+0x148/0x240 kernel/sched/completion.c:117
 wait_for_completion+0x20/0x30 kernel/sched/completion.c:138
 kthread_stop+0xf8/0x39c kernel/kthread.c:671
 svc_stop_kthreads+0x138/0x260 net/sunrpc/svc.c:797
 svc_set_num_threads+0xc8/0xe4 net/sunrpc/svc.c:818
 nfs_callback_down+0x120/0x200 fs/nfs/callback.c:325
 nfs4_destroy_callback fs/nfs/nfs4client.c:279 [inline]
 nfs4_shutdown_client+0x138/0x150 fs/nfs/nfs4client.c:287
 nfs4_free_client+0x20/0x40 fs/nfs/nfs4client.c:303
 nfs_put_client+0x238/0x340 fs/nfs/client.c:273
 nfs4_callback_compound+0x2cc/0x630 fs/nfs/callback_xdr.c:981
 nfs_callback_dispatch+0x44/0x6c fs/nfs/callback_xdr.c:995
 svc_process_common+0x9a0/0xdf0 net/sunrpc/svc.c:1400
 svc_process+0x138/0x1c4 net/sunrpc/svc.c:1542
 nfs4_callback_svc+0x58/0x90 fs/nfs/callback.c:89
 kthread+0x1e0/0x220 kernel/kthread.c:328
 ret_from_fork+0x10/0x18 arch/arm64/kernel/entry.S:1727
INFO: task umount.nfs4:93544 blocked for more than 1310 seconds.
      Not tainted 5.10.0-00574-gc310db27923f-dirty #16
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:umount.nfs4     state:D stack:    0 pid:93544 ppid:     1 flags:0x00000209
Call trace:
 __switch_to+0x98/0xdc arch/arm64/kernel/process.c:639
 context_switch kernel/sched/core.c:4055 [inline]
 __schedule+0x690/0xf0c kernel/sched/core.c:5003
 schedule+0xd8/0x220 kernel/sched/core.c:5139
 schedule_preempt_disabled+0x44/0x74 kernel/sched/core.c:5198
 __mutex_lock_common kernel/locking/mutex.c:1086 [inline]
 __mutex_lock+0x3b8/0xc40 kernel/locking/mutex.c:1148
 mutex_lock_nested+0x2c/0x3c kernel/locking/mutex.c:1163
 nfs_callback_down+0x64/0x200 fs/nfs/callback.c:319
 nfs4_destroy_callback fs/nfs/nfs4client.c:279 [inline]
 nfs4_shutdown_client+0x138/0x150 fs/nfs/nfs4client.c:287
 nfs4_free_client+0x20/0x40 fs/nfs/nfs4client.c:303
 nfs_put_client+0x238/0x340 fs/nfs/client.c:273
 nfs_free_server+0x78/0x13c fs/nfs/client.c:964
 nfs_kill_super+0x48/0x64 fs/nfs/super.c:1336
 deactivate_locked_super+0x84/0x124 fs/super.c:341
 deactivate_super+0xac/0xcc fs/super.c:372
 cleanup_mnt+0x184/0x240 fs/namespace.c:1143
 __cleanup_mnt+0x1c/0x30 fs/namespace.c:1150
 task_work_run+0xc8/0x14c kernel/task_work.c:187
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 do_notify_resume+0x23c/0x24c arch/arm64/kernel/signal.c:728
 work_pending+0xc/0xa0
INFO: task mount.nfs:93730 blocked for more than 1310 seconds.
      Not tainted 5.10.0-00574-gc310db27923f-dirty #16
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:mount.nfs       state:D stack:    0 pid:93730 ppid:     1 flags:0x00000209
Call trace:
 __switch_to+0x98/0xdc arch/arm64/kernel/process.c:639
 context_switch kernel/sched/core.c:4055 [inline]
 __schedule+0x690/0xf0c kernel/sched/core.c:5003
 schedule+0xd8/0x220 kernel/sched/core.c:5139
 schedule_preempt_disabled+0x44/0x74 kernel/sched/core.c:5198
 __mutex_lock_common kernel/locking/mutex.c:1086 [inline]
 __mutex_lock+0x3b8/0xc40 kernel/locking/mutex.c:1148
 mutex_lock_nested+0x2c/0x3c kernel/locking/mutex.c:1163
 nfs_callback_up+0x58/0x280 fs/nfs/callback.c:280
 nfs4_init_callback fs/nfs/nfs4client.c:323 [inline]
 nfs4_init_client_minor_version fs/nfs/nfs4client.c:406 [inline]
 nfs4_init_client+0x154/0x260 fs/nfs/nfs4client.c:427
 nfs_get_client+0x3a8/0x450 fs/nfs/client.c:429
 nfs4_set_client+0x168/0x250 fs/nfs/nfs4client.c:902
 nfs4_init_server+0x1f4/0x3f0 fs/nfs/nfs4client.c:1120
 nfs4_create_server+0x94/0x130 fs/nfs/nfs4client.c:1168
 nfs4_try_get_tree+0x50/0x14c fs/nfs/nfs4super.c:226
 nfs_get_tree+0x7c/0xcc fs/nfs/fs_context.c:1359
 vfs_get_tree+0x54/0x180 fs/super.c:1576
 do_new_mount+0x1a8/0x220 fs/namespace.c:2950
 path_mount+0x248/0x344 fs/namespace.c:3283
 do_mount fs/namespace.c:3296 [inline]
 __do_sys_mount fs/namespace.c:3507 [inline]
 __se_sys_mount fs/namespace.c:3481 [inline]
 __arm64_sys_mount+0x19c/0x1dc fs/namespace.c:3481
 __invoke_syscall arch/arm64/kernel/syscall.c:36 [inline]
 invoke_syscall arch/arm64/kernel/syscall.c:48 [inline]
 el0_svc_common.constprop.0+0xac/0x244 arch/arm64/kernel/syscall.c:155
 do_el0_svc+0x8c/0xbc arch/arm64/kernel/syscall.c:217
 el0_svc+0x20/0x30 arch/arm64/kernel/entry-common.c:385
 el0_sync_handler+0xb0/0xbc arch/arm64/kernel/entry-common.c:417
 el0_sync+0x160/0x180 arch/arm64/kernel/entry.S:1190

Showing all locks held in the system:
1 lock held by khungtaskd/57:
 #0: fffff2c5499cdfa0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x44/0x268 kernel/locking/lockdep.c:6396
1 lock held by systemd-journal/218:
1 lock held by NFSv4 callback/93188:
 #0: fffff2c549de1ec8 (nfs_callback_mutex){+.+.}-{3:3}, at: nfs_callback_down+0x64/0x200 fs/nfs/callback.c:319
1 lock held by umount.nfs4/93544:
 #0: fffff2c549de1ec8 (nfs_callback_mutex){+.+.}-{3:3}, at: nfs_callback_down+0x64/0x200 fs/nfs/callback.c:319
1 lock held by mount.nfs/93730:
 #0: fffff2c549de1ec8 (nfs_callback_mutex){+.+.}-{3:3}, at: nfs_callback_up+0x58/0x280 fs/nfs/callback.c:280

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GVP openEuler/kernel

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GVPopenEuler/kernel

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