[ 79.751404] rcu: INFO: rcu_sched detected stalls on CPUs/tasks: [ 79.758633] (detected by 0, t=2602 jiffies, g=4697, q=16429) [ 79.765139] rcu: All QSes seen, last rcu_sched kthread activity 2602 (-22026--24628), jiffies_till_next_fqs=1, root ->qsmask 0x0 [ 79.777563] rcu: rcu_sched kthread starved for 2602 jiffies! g4697 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 79.788374] rcu: Unless rcu_sched kthread gets sufficient CPU time, OOM is now expected behavior. [ 79.797901] rcu: RCU grace-period kthread stack dump: [ 79.803469] task:rcu_sched state:R running task stack: 0 pid: 11 ppid: 2 flags:0x00000000 [ 79.814789] __schedule from schedule+0x58/0xcc [ 79.820464] schedule from schedule_timeout+0x78/0xf8 [ 79.826524] schedule_timeout from rcu_gp_fqs_loop+0x108/0x3d0 [ 79.833419] rcu_gp_fqs_loop from rcu_gp_kthread+0xa8/0x134 [ 79.839968] rcu_gp_kthread from kthread+0xe4/0x104 [ 79.845802] kthread from ret_from_fork+0x14/0x28 [ 79.851344] Exception stack(0xd0041fb0 to 0xd0041ff8) [ 79.857137] 1fa0: 00000000 00000000 00000000 00000000 [ 79.866093] 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 79.875005] 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000 [ 79.882257] rcu: Stack dump where RCU GP kthread last ran: [ 79.888306] NMI backtrace for cpu 0 [ 79.892364] CPU: 0 PID: 58 Comm: kworker/0:8 Tainted: G W 5.18.0-rc7 #14 [ 79.901162] Hardware name: Generic AM33XX (Flattened Device Tree) [ 79.907898] Workqueue: events dbs_work_handler [ 79.913341] unwind_backtrace from show_stack+0x10/0x14 [ 79.919588] show_stack from dump_stack_lvl+0x58/0x70 [ 79.925713] dump_stack_lvl from nmi_cpu_backtrace+0xe0/0x128 [ 79.932520] nmi_cpu_backtrace from nmi_trigger_cpumask_backtrace+0xec/0x184 [ 79.940585] nmi_trigger_cpumask_backtrace from trigger_single_cpu_backtrace+0x20/0x2c [ 79.949523] trigger_single_cpu_backtrace from rcu_check_gp_kthread_starvation+0xf4/0x148 [ 79.958732] rcu_check_gp_kthread_starvation from rcu_sched_clock_irq+0xe1c/0xf8c [ 79.967278] rcu_sched_clock_irq from update_process_times+0x88/0xc0 [ 79.974688] update_process_times from tick_sched_handle+0x48/0x54 [ 79.981854] tick_sched_handle from tick_sched_timer+0x48/0xac [ 79.988576] tick_sched_timer from __hrtimer_run_queues+0x250/0x4e4 [ 79.995829] __hrtimer_run_queues from hrtimer_interrupt+0x128/0x2c8 [ 80.003205] hrtimer_interrupt from dmtimer_clockevent_interrupt+0x24/0x2c [ 80.011215] dmtimer_clockevent_interrupt from __handle_irq_event_percpu+0x98/0x334 [ 80.019978] __handle_irq_event_percpu from handle_irq_event+0x38/0xc0 [ 80.027458] handle_irq_event from handle_level_irq+0xb4/0x1a8 [ 80.034335] handle_level_irq from handle_irq_desc+0x1c/0x2c [ 80.040971] handle_irq_desc from generic_handle_arch_irq+0x2c/0x64 [ 80.048196] generic_handle_arch_irq from __irq_svc+0x90/0xbc [ 80.054809] Exception stack(0xd0001f58 to 0xd0001fa0) [ 80.060516] 1f40: c01015c8 00000000 [ 80.069486] 1f60: 0eaec000 00000000 fffffffe 600f0013 ffffffff d0385d64 016e3600 c3744a80 [ 80.078437] 1f80: 00000002 c3744a80 ffffffff d0001fa8 c01015c8 c01015d0 600f0113 ffffffff [ 80.087237] __irq_svc from __do_softirq+0xa0/0x5fc [ 80.093025] __do_softirq from __irq_exit_rcu+0x138/0x178 [ 80.099460] __irq_exit_rcu from irq_exit+0x8/0x28 [ 80.105230] irq_exit from call_with_stack+0x18/0x20 [ 80.111159] call_with_stack from __irq_svc+0x9c/0xbc [ 80.117055] Exception stack(0xd0385d30 to 0xd0385d78) [ 80.122806] 5d20: 00001901 f9e0042c 00000002 f9e00000 [ 80.131771] 5d40: c208dcc0 00000000 c208a680 c191a2fc 016e3600 11e1a300 c1109210 00000000 [ 80.140683] 5d60: fffffff9 d0385d80 c06d5d8c c06d30d8 600f0013 ffffffff [ 80.147898] __irq_svc from clk_memmap_readl+0x28/0x90 [ 80.154011] clk_memmap_readl from omap3_noncore_dpll_program+0x7c/0x5e4 [ 80.161766] omap3_noncore_dpll_program from clk_change_rate+0x238/0x4f8 [ 80.169435] clk_change_rate from clk_core_set_rate_nolock+0x1b0/0x29c [ 80.176806] clk_core_set_rate_nolock from clk_set_rate+0x30/0x64 [ 80.183777] clk_set_rate from _set_opp+0x214/0x528 [ 80.189541] _set_opp from dev_pm_opp_set_rate+0xec/0x228 [ 80.195818] dev_pm_opp_set_rate from __cpufreq_driver_target+0x580/0x6fc [ 80.203634] __cpufreq_driver_target from od_dbs_update+0xb4/0x168 [ 80.210877] od_dbs_update from dbs_work_handler+0x2c/0x60 [ 80.217323] dbs_work_handler from process_one_work+0x284/0x72c [ 80.224217] process_one_work from worker_thread+0x28/0x4b0 [ 80.230730] worker_thread from kthread+0xe4/0x104 [ 80.236422] kthread from ret_from_fork+0x14/0x28 [ 80.241925] Exception stack(0xd0385fb0 to 0xd0385ff8) [ 80.247670] 5fa0: 00000000 00000000 00000000 00000000 [ 80.256597] 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 80.265480] 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000