rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P38/1:b..l
rcu: 	(detected by 0, t=10503 jiffies, g=61781, q=1904 ncpus=2)
task:khugepaged      state:R  running task     stack:26864 pid:38    tgid:38    ppid:2      task_flags:0x200040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5533 [inline]
 __schedule+0x17db/0x58f0 kernel/sched/core.c:7284
 preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7606
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x14f/0x910 kernel/entry/common.c:167
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:rcu_read_lock include/linux/rcupdate.h:850 [inline]
RIP: 0010:start_flush_work kernel/workqueue.c:4354 [inline]
RIP: 0010:__flush_work+0x14f/0xca0 kernel/workqueue.c:4412
Code: 08 e8 05 15 58 0a 41 89 c7 31 ff 89 c6 e8 c9 59 39 00 45 85 ff 74 15 e8 af e4 1d 00 84 c0 74 18 e8 b6 54 39 00 4c 8b 7c 24 08 <eb> 67 e8 aa 54 39 00 4c 8b 7c 24 08 eb 5b e8 ce 14 58 0a 41 89 c7
RSP: 0018:ffffc90000ae7960 EFLAGS: 00000293
RAX: ffffffff818e967a RBX: ffff8880b8734108 RCX: ffff88802128ddc0
RDX: 0000000000000000 RSI: ffffffff8c6dad60 RDI: ffffffff8c6dad20
RBP: ffffc90000ae7b08 R08: ffffffff818e9631 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff20f4c50 R12: dffffc0000000000
R13: 1ffff110170e6821 R14: 1ffff9200015cf34 R15: ffff8880b87340f0
 __lru_add_drain_all+0x5eb/0x7a0 mm/folio.c:868
 khugepaged_do_scan mm/khugepaged.c:2978 [inline]
 khugepaged+0x1a7/0x1780 mm/khugepaged.c:3047
 kthread+0x38b/0x480 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>