rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P20741/1:b..l (detected by 0, t=10502 jiffies, g=200805, q=238 ncpus=2) task:udevd state:R running task stack:26344 pid:20741 ppid:3001 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5241 [inline] __schedule+0x142d/0x4550 kernel/sched/core.c:6554 preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6866 irqentry_exit+0x53/0x80 kernel/entry/common.c:433 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649 RIP: 0010:save_stack+0x1c/0x1e0 mm/page_owner.c:110 Code: 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec 00 01 00 00 89 7c 24 1c <65> 48 8b 04 25 28 00 00 00 48 89 84 24 e0 00 00 00 49 bc 00 00 00 RSP: 0018:ffffc9002605f5c0 EFLAGS: 00000286 RAX: ffff8880189e8c70 RBX: ffff8880189e8c70 RCX: ffff8880273d9dc0 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000002800 RBP: ffffc9002605f6f8 R08: ffffffff81ec5ac6 R09: fffffbfff2091845 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000 __reset_page_owner+0x52/0x1a0 mm/page_owner.c:148 reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1440 [inline] free_pcp_prepare mm/page_alloc.c:1490 [inline] free_unref_page_prepare+0xf63/0x1120 mm/page_alloc.c:3358 free_unref_page_list+0x663/0x900 mm/page_alloc.c:3499 release_pages+0x2836/0x2b40 mm/swap.c:1055 __pagevec_release+0x80/0xf0 mm/swap.c:1075 pagevec_release include/linux/pagevec.h:71 [inline] folio_batch_release include/linux/pagevec.h:135 [inline] truncate_inode_pages_range+0x48a/0x1340 mm/truncate.c:373 kill_bdev block/bdev.c:76 [inline] blkdev_flush_mapping+0x154/0x2b0 block/bdev.c:662 blkdev_put_whole block/bdev.c:693 [inline] blkdev_put+0x4c0/0x750 block/bdev.c:953 blkdev_close+0x56/0x80 block/fops.c:514 __fput+0x3b7/0x890 fs/file_table.c:320 task_work_run+0x246/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:297 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fb6b35170a8 RSP: 002b:00007ffe6e0679d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 00007fb6b38beae0 RCX: 00007fb6b35170a8 RDX: 0000559fcf27fc4d RSI: 00007ffe6e0671d8 RDI: 0000000000000008 RBP: 0000559a968c62c0 R08: 0000000000000006 R09: 5628549a1aadf773 R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000002 R13: 0000559a968da5a0 R14: 0000000000000008 R15: 0000559a968c5910 rcu: rcu_preempt kthread starved for 10279 jiffies! g200805 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 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:26136 pid:16 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5241 [inline] __schedule+0x142d/0x4550 kernel/sched/core.c:6554 schedule+0xbf/0x180 kernel/sched/core.c:6630 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1935 rcu_gp_fqs_loop+0x2c2/0x1010 kernel/rcu/tree.c:1661 rcu_gp_kthread+0xa3/0x3a0 kernel/rcu/tree.c:1860 kthread+0x28d/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 rcu: Stack dump where RCU GP kthread last ran: Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline] NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline] NMI backtrace for cpu 1 skipped: idling at acpi_safe_halt drivers/acpi/processor_idle.c:112 [inline] NMI backtrace for cpu 1 skipped: idling at acpi_idle_do_entry+0x10f/0x340 drivers/acpi/processor_idle.c:572