INFO: rcu_sched detected stalls on CPUs/tasks:
	(detected by 1, t=100002 jiffies, g=64641, c=64640, q=0)
All QSes seen, last rcu_sched kthread activity 99998 (4295135012-4295035014), jiffies_till_next_fqs=3, root ->qsmask 0x0
blkid           R  running task    58304 18116   6698 0x00000008
Call Trace:
 <IRQ>
 sched_show_task+0x610/0x760 kernel/sched/core.c:5332
 print_other_cpu_stall kernel/rcu/tree.c:1441 [inline]
 check_cpu_stall kernel/rcu/tree.c:1559 [inline]
 __rcu_pending kernel/rcu/tree.c:3244 [inline]
 rcu_pending kernel/rcu/tree.c:3291 [inline]
 rcu_check_callbacks+0x2632/0x29a0 kernel/rcu/tree.c:2646
 update_process_times+0x132/0x1a0 kernel/time/timer.c:1636
 tick_sched_handle kernel/time/tick-sched.c:164 [inline]
 tick_sched_timer+0x3bf/0x520 kernel/time/tick-sched.c:1274
 __run_hrtimer kernel/time/hrtimer.c:1398 [inline]
 __hrtimer_run_queues+0xc74/0x1680 kernel/time/hrtimer.c:1460
 hrtimer_interrupt+0x451/0x13c0 kernel/time/hrtimer.c:1518
 local_apic_timer_interrupt+0x6b/0x250 arch/x86/kernel/apic/apic.c:1025
 smp_apic_timer_interrupt+0x5a/0x90 arch/x86/kernel/apic/apic.c:1053
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:868
 </IRQ>
RIP: 0010:rep_nop arch/x86/include/asm/processor.h:658 [inline]
RIP: 0010:cpu_relax arch/x86/include/asm/processor.h:663 [inline]
RIP: 0010:csd_lock_wait kernel/smp.c:108 [inline]
RIP: 0010:smp_call_function_single+0x357/0x500 kernel/smp.c:302
Code: 85 93 00 00 00 e8 89 c5 12 00 e9 be 00 00 00 8b 3a e8 fd 79 6e 00 45 85 f6 74 91 41 89 de eb 08 0f 1f 00 e8 6b c5 12 00 f3 90 <8b> 5c 24 58 4c 89 e7 e8 bd 6f 6e 00 8b 00 83 e0 01 83 e3 01 85 c0 
RSP: 0018:ffff8801010df7a0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
RAX: ffffffff81555f95 RBX: 0000000000000001 RCX: ffff88013bff5880
RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea00060653a0
RBP: ffff8801010df878 R08: 0000000000000000 R09: 0000000000000002
R10: 0000000000000000 R11: ffffffff8117d090 R12: ffff8801010df7f8
R13: 0000000000000000 R14: 0000000000000000 R15: ffff88013bff6180
 smp_call_function_many+0x672/0xe30 kernel/smp.c:434
 on_each_cpu_mask kernel/smp.c:632 [inline]
 on_each_cpu_cond+0x335/0x420 kernel/smp.c:684
 invalidate_bh_lrus+0x54/0x60 fs/buffer.c:1392
 kill_bdev fs/block_dev.c:85 [inline]
 __blkdev_put+0x44b/0xcc0 fs/block_dev.c:1787
 blkdev_put+0x435/0x570 fs/block_dev.c:1855
 blkdev_close+0xa6/0xf0 fs/block_dev.c:1862
 __fput+0x458/0xa30 fs/file_table.c:209
 ____fput+0x37/0x40 fs/file_table.c:243
 task_work_run+0x22e/0x2b0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:192 [inline]
 exit_to_usermode_loop arch/x86/entry/common.c:166 [inline]
 prepare_exit_to_usermode+0x35d/0x430 arch/x86/entry/common.c:197
 syscall_return_slowpath+0x108/0x800 arch/x86/entry/common.c:268
 do_syscall_64+0x1ad/0x230 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x7fcebba922b0
Code: 40 75 0b 31 c0 48 83 c4 08 e9 0c ff ff ff 48 8d 3d c5 32 08 00 e8 c0 07 02 00 83 3d 45 a3 2b 00 00 75 10 b8 03 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 ce 8a 01 00 48 89 04 24 
RSP: 002b:00007ffce0948af8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fcebba922b0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000028 R09: 0000000001680000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000007b0030
R13: 0000000000000000 R14: 0000000000000003 R15: 0000000000000005
rcu_sched kthread starved for 99998 jiffies! g64641 c64640 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0
RCU grace-period kthread stack dump:
rcu_sched       R  running task    61768    10      2 0x80000000
Call Trace:
 context_switch kernel/sched/core.c:2857 [inline]
 __schedule+0x652/0x780 kernel/sched/core.c:3507
 schedule+0x1cc/0x300 kernel/sched/core.c:3551
 schedule_timeout+0x416/0x5b0 kernel/time/timer.c:1801
 rcu_gp_kthread+0x1ed1/0x3a40 kernel/rcu/tree.c:2179
 kthread+0x473/0x4b0 kernel/kthread.c:247
 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:415