rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P11/1:b..l
	(detected by 1, t=10502 jiffies, g=10641, q=393 ncpus=2)
task:kworker/u4:1    state:R  running task     stack:23472 pid:11    ppid:2      flags:0x00004000
Workqueue: writeback wb_workfn (flush-8:0)
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
 preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6874
 irqentry_exit+0x63/0x70 kernel/entry/common.c:439
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:PagePoisoned include/linux/page-flags.h:304 [inline]
RIP: 0010:page_to_nid include/linux/mm.h:1305 [inline]
RIP: 0010:page_zone include/linux/mm.h:1505 [inline]
RIP: 0010:folio_zone include/linux/mm.h:1515 [inline]
RIP: 0010:zone_stat_mod_folio include/linux/vmstat.h:433 [inline]
RIP: 0010:__folio_start_writeback+0x8d8/0x1000 mm/page-writeback.c:3028
Code: 00 00 e8 9b 43 d3 ff e9 0e fc ff ff e8 91 43 d3 ff e8 ec 73 7d 08 4d 85 f6 0f 84 f9 fe ff ff e8 7e 43 d3 ff fb 48 8b 44 24 18 <42> 80 3c 28 00 74 08 48 89 df e8 39 2f 24 00 4c 8b 3b 48 c7 c7 ff
RSP: 0018:ffffc90000106d00 EFLAGS: 00000293
RAX: 1ffffd400038dac8 RBX: ffffea0001c6d640 RCX: ffff88813fea3b80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000106e80 R08: ffffffff90af52e7 R09: 1ffffffff215ea5c
R10: dffffc0000000000 R11: fffffbfff215ea5d R12: ffffea0001c6d648
R13: dffffc0000000000 R14: 0000000000000200 R15: 0000000000000000
 ext4_bio_write_page+0x30d/0x2ae0 fs/ext4/page-io.c:453
 mpage_submit_page+0x17a/0x210 fs/ext4/inode.c:2142
 mpage_map_and_submit_buffers fs/ext4/inode.c:2387 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2526 [inline]
 ext4_writepages+0x1b3d/0x2f40 fs/ext4/inode.c:2855
 do_writepages+0x3ba/0x640 mm/page-writeback.c:2491
 __writeback_single_inode+0x156/0x1160 fs/fs-writeback.c:1622
 writeback_sb_inodes+0xb30/0x1850 fs/fs-writeback.c:1913
 __writeback_inodes_wb+0x12a/0x3f0 fs/fs-writeback.c:1984
 wb_writeback+0x494/0xd50 fs/fs-writeback.c:2089
 wb_check_old_data_flush fs/fs-writeback.c:2189 [inline]
 wb_do_writeback fs/fs-writeback.c:2242 [inline]
 wb_workfn+0xb68/0xee0 fs/fs-writeback.c:2270
 process_one_work+0x8a2/0x1160 kernel/workqueue.c:2292
 worker_thread+0xaa2/0x1270 kernel/workqueue.c:2439
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
rcu: rcu_preempt kthread starved for 9599 jiffies! g10641 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:27736 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
 schedule+0xb9/0x180 kernel/sched/core.c:6638
 schedule_timeout+0x184/0x2d0 kernel/time/timer.c:2168
 rcu_gp_fqs_loop+0x303/0x1340 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0x99/0x3b0 kernel/rcu/tree.c:1905
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
NMI backtrace for cpu 0 skipped: idling at default_idle+0xb/0x10 arch/x86/kernel/process.c:741