rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5846/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=13953, q=2665 ncpus=2)
task:kworker/0:3     state:R  running task     stack:24200 pid:5846  tgid:5846  ppid:2      task_flags:0x4208060 flags:0x00004000
Workqueue: events purge_vmap_node
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:unwind_next_frame+0xb6a/0x2390
Code: 83 3e 00 0f 95 c0 49 39 df 0f 96 c1 20 c1 49 39 dc 0f 97 c0 20 c8 3c 01 75 18 48 8d 43 08 4c 39 f8 0f 97 c1 4c 39 e0 0f 96 c0 <84> c1 0f 85 c2 00 00 00 49 8d 7e 28 48 89 f8 48 c1 e8 03 48 b9 00
RSP: 0018:ffffc900035bf378 EFLAGS: 00000283
RAX: ffffc900035bf901 RBX: ffffc900035bf938 RCX: 1ffff920006b7e01
RDX: ffffffff9040c184 RSI: 0000000000000002 RDI: ffffffff8be33da0
RBP: 1ffff920006b7e8a R08: 000000000000000d R09: ffffffff8172d195
R10: ffffc900035bf120 R11: ffffffff81ac4d00 R12: ffffc900035c0000
R13: 1ffff920006b7e8b R14: ffffc900035bf448 R15: ffffc900035b8000
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 save_stack+0xf5/0x1f0
 __reset_page_owner+0x71/0x1f0
 __free_frozen_pages+0xbc4/0xd30
 kasan_depopulate_vmalloc_pte+0x6d/0x90
 __apply_to_page_range+0xb66/0x13d0
 kasan_release_vmalloc+0xa2/0xd0
 purge_vmap_node+0x214/0x8f0
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x439/0x7d0
 ret_from_fork_asm+0x1a/0x30
 </TASK>
