/proc/2002/stack:
[<0>] nfs_wait_client_init_complete.part.12+0x3b/0x90 [nfs]
[<0>] nfs41_discover_server_trunking+0x61/0xa0 [nfsv4]
[<0>] nfs4_discover_server_trunking+0x72/0x240 [nfsv4]
[<0>] nfs4_init_client+0xbd/0x150 [nfsv4]
[<0>] nfs4_set_client+0xed/0x150 [nfsv4]
[<0>] nfs4_create_server+0x127/0x2c0 [nfsv4]
[<0>] nfs4_try_get_tree+0x33/0xb0 [nfsv4]
[<0>] vfs_get_tree+0x25/0xc0
[<0>] do_mount+0x2e9/0x950
[<0>] ksys_mount+0xbe/0xe0
[<0>] __x64_sys_mount+0x21/0x30
[<0>] do_syscall_64+0x5b/0x1b0
[<0>] entry_SYSCALL_64_after_hwframe+0x61/0xc6

/proc/2022/stack:
[<0>] nfs41_callback_svc+0x18f/0x1a0 [nfsv4]
[<0>] kthread+0x134/0x150
[<0>] ret_from_fork+0x1f/0x40

/proc/2023/stack:
[<0>] msleep+0x28/0x40
[<0>] nfs4_handle_reclaim_lease_error+0x7e/0x140 [nfsv4]
[<0>] nfs4_state_manager+0x487/0x860 [nfsv4]
[<0>] nfs4_run_state_manager+0x20/0x40 [nfsv4]
[<0>] kthread+0x134/0x150
[<0>] ret_from_fork+0x1f/0x40