[ 5308.039251] watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [nginx:2222]
[ 5308.046269] Modules linked in: binfmt_misc udp_diag tcp_diag inet_diag nfnetlink_queue nfnetlink_log nfnetlink ppdev parport_pc parport input_leds pvpanic serio_raw ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcbc aesni_intel aes_x86_64 crypto_simd glue_helper cryptd psmouse virtio_net virtio_scsi
[ 5308.046305] CPU: 0 PID: 2222 Comm: nginx Tainted: G             L  4.13.0-38-generic #43~16.04.1-Ubuntu
[ 5308.046306] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 5308.046307] task: ffff9dc1757c0000 task.stack: ffffbaf0c2218000
[ 5308.046316] RIP: 0010:fsnotify+0x268/0x4f0
[ 5308.046317] RSP: 0018:ffffbaf0c221be00 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
[ 5308.046318] RAX: 0000000000000000 RBX: ffff9dc1c2990f98 RCX: 00000000ffffffff
[ 5308.046319] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffa06afde0
[ 5308.046320] RBP: ffffbaf0c221bea0 R08: 0000000000000000 R09: 0000000000000000
[ 5308.046321] R10: 00000000000000c4 R11: 0000000000000000 R12: 0000000000000000
[ 5308.046322] R13: ffff9dc1c2990fc0 R14: 0000000000000000 R15: 0000000000000000
[ 5308.046323] FS:  00007f869e7ea700(0000) GS:ffff9dc1cc800000(0000) knlGS:0000000000000000
[ 5308.046324] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 5308.046325] CR2: 00007f102fd5be80 CR3: 00000001b2428000 CR4: 00000000001406f0
[ 5308.046329] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 5308.046330] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 5308.046330] Call Trace:
[ 5308.046337]  vfs_write+0x15a/0x1b0
[ 5308.046342]  ? syscall_trace_enter+0x1d9/0x2f0
[ 5308.046344]  SyS_write+0x55/0xc0
[ 5308.046346]  do_syscall_64+0x67/0x120
[ 5308.046351]  entry_SYSCALL64_slow_path+0x25/0x25
[ 5308.046353] RIP: 0033:0x7f869e1c24a0
[ 5308.046353] RSP: 002b:00007ffd71abcab8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 5308.046355] RAX: ffffffffffffffda RBX: 0000561584cc23e0 RCX: 00007f869e1c24a0
[ 5308.046356] RDX: 0000000000000082 RSI: 0000561584a46690 RDI: 0000000000000005
[ 5308.046357] RBP: 00005615847d0fa0 R08: 00007ffd71abca91 R09: 0000000000000000
[ 5308.046357] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000082
[ 5308.046358] R13: 00005615847c828b R14: 00005615847d1568 R15: 00005615847d0fa0
[ 5308.046359] Code: 74 08 84 c0 0f 85 f3 01 00 00 8b 4d 88 85 c9 0f 85 02 ff ff ff 48 85 db 0f 84 bd 01 00 00 8b 4b 40 8b 33 31 d2 48 8b 43 08 f7 d1 <21> ce 23 75 a4 4d 85 e4 41 89 f3 0f 85 20 ff ff ff e9 36 ff ff