rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-...!: (1 GPs behind) idle=75e/1/0x4000000000000002 softirq=547699/547702 fqs=0 (t=11065 jiffies g=436349 q=175) rcu: rcu_preempt kthread starved for 11065 jiffies! g436349 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 28896 10 2 0x80004000 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x877/0xc50 kernel/sched/core.c:3880 schedule+0x131/0x1e0 kernel/sched/core.c:3944 schedule_timeout+0x14f/0x240 kernel/time/timer.c:1807 rcu_gp_fqs_loop kernel/rcu/tree.c:1611 [inline] rcu_gp_kthread+0xef8/0x1790 kernel/rcu/tree.c:1768 kthread+0x332/0x350 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 NMI backtrace for cpu 1 CPU: 1 PID: 11668 Comm: kworker/1:3 Not tainted 5.3.0-rc3+ #65 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: rcu_gp process_srcu Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1d8/0x2f8 lib/dump_stack.c:113 nmi_cpu_backtrace+0xaf/0x1a0 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x174/0x290 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x10/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x15a/0x220 kernel/rcu/tree_stall.h:254 print_cpu_stall kernel/rcu/tree_stall.h:455 [inline] check_cpu_stall kernel/rcu/tree_stall.h:529 [inline] rcu_pending kernel/rcu/tree.c:2736 [inline] rcu_sched_clock_irq+0xb95/0x16d0 kernel/rcu/tree.c:2183 update_process_times+0x134/0x190 kernel/time/timer.c:1639 tick_sched_handle kernel/time/tick-sched.c:167 [inline] tick_sched_timer+0x263/0x420 kernel/time/tick-sched.c:1296 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x403/0x850 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x38c/0xda0 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1068 [inline] smp_apic_timer_interrupt+0x109/0x280 arch/x86/kernel/apic/apic.c:1093 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:828 RIP: 0010:preempt_schedule_irq+0xb7/0x140 kernel/sched/core.c:4128 Code: fe f9 43 80 3c 37 00 74 0c 48 c7 c7 90 87 8a 88 e8 ae 5d 32 fa 48 83 3d 16 62 10 01 00 0f 84 82 00 00 00 fb 66 0f 1f 44 00 00 01 00 00 00 e8 1f ee ff ff 43 80 3c 34 00 74 0c 48 c7 c7 88 87 RSP: 0018:ffff88805e1a7a68 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff117c400 RBX: 0000000000000000 RCX: ffff888057e363c0 RDX: 0000000000000000 RSI: ffffffff87800a20 RDI: ffffffff877a255f RBP: ffff88805e1a7a88 R08: ffffffff81790b14 R09: ffffed1015d66a6d R10: ffffed1015d66a6d R11: 0000000000000000 R12: 1ffffffff11150f1 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffffffff11150f2 retint_kernel+0x1b/0x2b RIP: 0010:delay_tsc+0x9b/0xf0 arch/x86/lib/delay.c:68 Code: 01 f9 66 90 49 89 d4 49 c1 e4 20 49 09 c4 eb 29 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 a8 01 75 ca f3 90 bf 01 00 00 00 20 b2 d7 f9 e8 cb ac da fb 41 39 c7 75 bb 0f 01 f9 66 90 48 89 RSP: 0018:ffff88805e1a7b48 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff02 RAX: 0000000080000000 RBX: 0000000000000236 RCX: 0000000000000001 RDX: 00000000000004e7 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffff88805e1a7b68 R08: ffffffff8353786a R09: fffffbfff11202a4 R10: fffffbfff11202a4 R11: 0000000000000000 R12: 000004e7493237d2 R13: 0000000000000001 R14: 0000000000002ced R15: 0000000000000001 __delay arch/x86/lib/delay.c:161 [inline] __const_udelay+0x5e/0x70 arch/x86/lib/delay.c:175 try_check_zero+0x6e/0x380 kernel/rcu/srcutree.c:705 srcu_advance_state kernel/rcu/srcutree.c:1142 [inline] process_srcu+0x1b7/0xd20 kernel/rcu/srcutree.c:1237 process_one_work+0x7ef/0x10e0 kernel/workqueue.c:2269 worker_thread+0xc01/0x1630 kernel/workqueue.c:2415 kthread+0x332/0x350 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1