rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5930/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=169921, q=3525 ncpus=2)
task:kworker/0:11    state:R  running task     stack:25376 pid:5930  tgid:5930  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: events_power_efficient gc_worker
Call Trace:
 <TASK>
 __schedule+0x15dd/0x52d0
 preempt_schedule_irq+0x4d/0xa0
 irqentry_exit+0x599/0x620
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:seqcount_lockdep_reader_access+0xed/0x100
Code: 00 75 11 e8 c5 64 fb f7 4d 85 f6 75 16 e8 bb 64 fb f7 eb 15 e8 b4 64 fb f7 e8 0f 95 e4 01 4d 85 f6 74 ea e8 a5 64 fb f7 fb 5b <41> 5e e9 0c 7b e7 01 cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90
RSP: 0018:ffffc9000618f970 EFLAGS: 00000293
RAX: ffffffff89ca3d8b RBX: 0000000000000001 RCX: ffff88810e79d7c0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000618fad0 R08: ffffffff9011b4b7 R09: 1ffffffff2023696
R10: dffffc0000000000 R11: fffffbfff2023697 R12: dffffc0000000000
R13: ffff888114630218 R14: 0000000000000200 R15: 00000000000044d1
 gc_worker+0x304/0x1290
 process_scheduled_works+0xb6e/0x18c0
 worker_thread+0xa53/0xfc0
 kthread+0x388/0x470
 ret_from_fork+0x51e/0xb90
 ret_from_fork_asm+0x1a/0x30
 </TASK>
sched: DL replenish lagged too much
