NMI watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [18.0.16.140-man:252496]
Modules linked in: tcp_diag udp_diag inet_diag unix_diag af_packet_diag netlink_diag binfmt_misc fuse btrfs raid6_pq xor vfat msdos fat ext4 mbcache jbd2 cdp(OE) rpcsec_gss_krb5 auth_rpcgss nfsv4 pv_channel(OE) kvm_ivshmem(OE) dns_resolver nfs lockd grace fscache sunrpc ppdev nfit libnvdimm iosf_mbi crc32_pclmul ghash_clmulni_intel aesni_intel lrw gf128mul glue_helper ablk_helper cryptd joydev sg virtio_balloon pcspkr i2c_piix4 parport_pc parport ip_tables xfs libcrc32c sr_mod cdrom virtio_net virtio_blk virtio_console ata_generic pata_acpi crct10dif_pclmul crct10dif_common crc32c_intel cirrus drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ttm drm ata_piix drm_panel_orientation_quirks libata serio_raw virtio_pci virtio_ring virtio floppy dm_mirror dm_region_hash dm_log dm_mod
CPU: 0 PID: 252496 Comm: 18.0.16.140-man Kdump: loaded Tainted: G           OE  ------------   3.10.0-957.el7.x86_64 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.10.2-0-g5f4c7b1-20181220_000000-szxrtosci10000 04/01/2014
task: ffff97e457c95140 ti: ffff97e45831c000 task.ti: ffff97e45831c000
RIP: 0010:[<ffffffffa9b11ae4>]  [<ffffffffa9b11ae4>] __raw_callee_save___pv_queued_spin_unlock+0x10/0x17
RSP: 0018:ffff97e45831fd60  EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffff97e3fd2572e0 RCX: ffff97e44cf0d000
RDX: 0000000000000000 RSI: 0000000000000005 RDI: ffff97e0894e5c60
RBP: ffff97e45831fd68 R08: ffff97e44cf0e08c R09: 000000018040001d
R10: 00000000fd254e01 R11: ffffed749ef49400 R12: ffff97e45831fd00
R13: 000000018040001d R14: 0000000000000286 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff97e45b600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f21cc137ac0 CR3: 000000080af50000 CR4: 00000000003607f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
[<ffffffffa9c5e29a>] igrab+0x4a/0x60
[<ffffffffc061e7ba>] nfs_delegation_grab_inode+0x2a/0x50 [nfsv4]
[<ffffffffc061fb3c>] nfs_delegation_reap_unclaimed+0xac/0x140 [nfsv4]
[<ffffffffc0619e48>] nfs4_state_clear_reclaim_reboot+0x138/0x160 [nfsv4]
[<ffffffffc061bf80>] nfs4_state_manager+0x5d0/0x8d0 [nfsv4]
[<ffffffffc061c280>] ? nfs4_state_manager+0x8d0/0x8d0 [nfsv4]
[<ffffffffc061c29f>] nfs4_run_state_manager+0x1f/0x40 [nfsv4]
[<ffffffffa9ac1c31>] kthread+0xd1/0xe0
[<ffffffffa9ac1b60>] ? insert_kthread_work+0x40/0x40
[<ffffffffaa174c1d>] ret_from_fork_nospec_begin+0x7/0x21
[<ffffffffa9ac1b60>] ? insert_kthread_work+0x40/0x40
Code: 50 41 51 41 52 41 53 e8 1b 07 00 00 41 5b 41 5a 41 59 41 58 5f 5e 5a 59 5d c3 90 55 48 89 e5 52 b8 01 00 00 00 31 d2 f0 0f b0 17 <3c> 01 75 03 5a 5d c3 56 0f b6 f0 e8 bc ff ff ff 5e 5a 5d c3 0f