[ 448.453994] INFO: rcu_preempt self-detected stall on CPU [ 448.459389] 0-...: (2100 ticks this GP) idle=7ea/140000000000001/0 softirq=31421/31421 fqs=0 [ 448.468038] (t=2100 jiffies g=14732 c=14731 q=652) [ 448.473039] rcu_preempt kthread starved for 2100 jiffies! g14732 c14731 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x402 ->cpu=0 [ 448.483694] rcu_preempt I 0 8 2 0x00000000 [ 448.489210] Backtrace: [ 448.491702] [] (__schedule) from [] (schedule+0x58/0xc4) [ 448.498792] r10:c0d14d60 r9:00000003 r8:c0d15400 r7:c0d15440 r6:cf05bee8 r5:c0d15440 [ 448.506655] r4:ffffe000 [ 448.509214] [] (schedule) from [] (schedule_timeout+0x184/0x264) [ 448.516992] r5:c0d15440 r4:000031ca [ 448.520599] [] (schedule_timeout) from [] (rcu_gp_kthread+0x688/0xaa4) [ 448.528906] r8:00000001 r7:c0d14e1c r6:c0d15400 r5:ffffe000 r4:00000001 [ 448.535655] [] (rcu_gp_kthread) from [] (kthread+0x15c/0x164) [ 448.543170] r7:cf05a000 [ 448.545732] [] (kthread) from [] (ret_from_fork+0x14/0x2c) [ 448.552993] r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:c0145a5c [ 448.560858] r4:cf030680 [ 448.563411] Task dump for CPU 0: [ 448.566654] kworker/u2:0 R running task 0 5 2 0x00000002 [ 448.573761] Workqueue: events_unbound flush_to_ldisc [ 448.578748] Backtrace: [ 448.581221] [] (dump_backtrace) from [] (show_stack+0x18/0x1c) [ 448.588828] r7:c0d14d60 r6:c0d03100 r5:00000002 r4:cf041800 [ 448.594531] [] (show_stack) from [] (sched_show_task.part.9+0xc4/0xdc) [ 448.602844] [] (sched_show_task.part.9) from [] (dump_cpu_task+0x38/0x3c) [ 448.611408] r5:00000000 r4:c0d14d60 [ 448.615008] [] (dump_cpu_task) from [] (rcu_dump_cpu_stacks+0x90/0xd0) [ 448.623318] [] (rcu_dump_cpu_stacks) from [] (rcu_check_callbacks+0x5c4/0x8f0) [ 448.632324] r10:c0d030f4 r9:c0d03100 r8:c0d15400 r7:00000000 r6:c0d14d60 r5:c0d14d60 [ 448.640188] r4:c0d151a8 r3:cf050000 [ 448.643793] [] (rcu_check_callbacks) from [] (update_process_times+0x3c/0x64) [ 448.652712] r10:c018ebf4 r9:00000000 r8:00000007 r7:00000068 r6:00000000 r5:cf041800 [ 448.660575] r4:ffffe000 [ 448.663129] [] (update_process_times) from [] (tick_sched_handle+0x5c/0x60) [ 448.671870] r7:00000068 r6:69b40c76 r5:cf051eb0 r4:c0d16c80 [ 448.677559] [] (tick_sched_handle) from [] (tick_sched_timer+0x64/0xd0) [ 448.685958] [] (tick_sched_timer) from [] (__hrtimer_run_queues.constprop.5+0x150/0x1e8) [ 448.695833] r7:ffffe000 r6:c0d165c0 r5:c0d16c80 r4:c0d16580 [ 448.701528] [] (__hrtimer_run_queues.constprop.5) from [] (hrtimer_interrupt+0x9c/0x248) [ 448.711405] r10:c0d16638 r9:c0d16580 r8:ffffffff r7:7fffffff r6:00000003 r5:ffffe000 [ 448.719267] r4:c0d16580 [ 448.721832] [] (hrtimer_interrupt) from [] (omap2_gp_timer_interrupt+0x30/0x38) [ 448.730925] r10:c0d4ec40 r9:cf006200 r8:00000010 r7:cf051e14 r6:00000000 r5:cf006200 [ 448.738789] r4:c0d07fb4 [ 448.741355] [] (omap2_gp_timer_interrupt) from [] (__handle_irq_event_percpu+0x6c/0x140) [ 448.751236] [] (__handle_irq_event_percpu) from [] (handle_irq_event_percpu+0x24/0x60) [ 448.760939] r10:c0d15400 r9:cf050000 r8:cf008000 r7:00000000 r6:00000000 r5:cf006200 [ 448.768802] r4:cf006200 [ 448.771356] [] (handle_irq_event_percpu) from [] (handle_irq_event+0x64/0x90) [ 448.780269] r5:00000010 r4:cf006200 [ 448.783871] [] (handle_irq_event) from [] (handle_level_irq+0xb4/0x158) [ 448.792259] r5:00000010 r4:cf006200 [ 448.795858] [] (handle_level_irq) from [] (generic_handle_irq+0x2c/0x3c) [ 448.804335] r5:00000010 r4:c0d4d6d0 [ 448.807934] [] (generic_handle_irq) from [] (__handle_domain_irq+0x5c/0xb0) [ 448.816679] [] (__handle_domain_irq) from [] (omap_intc_handle_irq+0x3c/0x98) [ 448.825598] r9:cf050000 r8:cf005000 r7:cf051ee4 r6:ffffffff r5:20070013 r4:c0d823f0 [ 448.833382] [] (omap_intc_handle_irq) from [] (__irq_svc+0x6c/0xa8) [ 448.841422] Exception stack(0xcf051eb0 to 0xcf051ef8) [ 448.846502] 1ea0: cf02a274 00000002 cf005014 cf051f00 [ 448.854722] 1ec0: cf02a274 cf031200 cf004100 00000000 cf005000 00000000 c0d15400 cf051f34 [ 448.862942] 1ee0: cf051f00 cf051f00 c013fb44 c013fb4c 20070013 ffffffff [ 448.869586] r5:20070013 r4:c013fb4c [ 448.873186] [] (process_one_work) from [] (worker_thread+0x84/0x680) [ 448.881319] r10:c0d15400 r9:00000088 r8:cf005014 r7:ffffe000 r6:cf031218 r5:cf005000 [ 448.889183] r4:cf031200 [ 448.891734] [] (worker_thread) from [] (kthread+0x15c/0x164) [ 448.899170] r10:cf03fe94 r9:c013fdc0 r8:cf031200 r7:cf050000 r6:00000000 r5:cf030500 [ 448.907033] r4:cf0305c0 [ 448.909585] [] (kthread) from [] (ret_from_fork+0x14/0x2c) [ 448.916846] r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:c0145a5c [ 448.924709] r4:cf030500 _____ _____ _ _ | _ [ 494.633997] INFO: rcu_preempt self-detected stall on CPU [ 494.639388] 0-...: (2100 ticks this GP) idle=7ea/140000000000001/0 softirq=31423/31423 fqs=0 [ 494.648036] (t=2100 jiffies g=14734 c=14733 q=1599) [ 494.653124] rcu_preempt kthread starved for 2100 jiffies! g14734 c14733 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x402 ->cpu=0 [ 494.663779] rcu_preempt I 0 8 2 0x00000000 [ 494.669295] Backtrace: [ 494.671785] [] (__schedule) from [] (schedule+0x58/0xc4) [ 494.678873] r10:c0d14d60 r9:00000003 r8:c0d15400 r7:c0d15440 r6:cf05bee8 r5:c0d15440 [ 494.686737] r4:ffffe000 [ 494.689295] [] (schedule) from [] (schedule_timeout+0x184/0x264) [ 494.697073] r5:c0d15440 r4:000043d4 [ 494.700680] [] (schedule_timeout) from [] (rcu_gp_kthread+0x688/0xaa4) [ 494.708987] r8:00000001 r7:c0d14e1c r6:c0d15400 r5:ffffe000 r4:00000001 [ 494.715735] [] (rcu_gp_kthread) from [] (kthread+0x15c/0x164) [ 494.723251] r7:cf05a000 [ 494.725812] [] (kthread) from [] (ret_from_fork+0x14/0x2c) [ 494.733073] r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:c0145a5c [ 494.740937] r4:cf030680 [ 494.743491] Task dump for CPU 0: [ 494.746733] uart split R running task 0 1163 173 0x00000002 [ 494.753820] Backtrace: [ 494.756296] [] (dump_backtrace) from [] (show_stack+0x18/0x1c) [ 494.763904] r7:c0d14d60 r6:c0d03100 r5:000000ad r4:ce398c00 [ 494.769608] [] (show_stack) from [] (sched_show_task.part.9+0xc4/0xdc) [ 494.777919] [] (sched_show_task.part.9) from [] (dump_cpu_task+0x38/0x3c) [ 494.786482] r5:00000000 r4:c0d14d60 [ 494.790081] [] (dump_cpu_task) from [] (rcu_dump_cpu_stacks+0x90/0xd0) [ 494.798390] [] (rcu_dump_cpu_stacks) from [] (rcu_check_callbacks+0x5c4/0x8f0) [ 494.807396] r10:c0d030f4 r9:c0d03100 r8:c0d15400 r7:00000000 r6:c0d14d60 r5:c0d14d60 [ 494.815261] r4:c0d151a8 r3:ce460000 [ 494.818865] [] (rcu_check_callbacks) from [] (update_process_times+0x3c/0x64) [ 494.827783] r10:c018ebf4 r9:00000000 r8:00000007 r7:00000073 r6:00000000 r5:ce398c00 [ 494.835647] r4:ffffe000 [ 494.838202] [] (update_process_times) from [] (tick_sched_handle+0x5c/0x60) [ 494.846944] r7:00000073 r6:2a3eff63 r5:ce461dc8 r4:c0d16c80 [ 494.852633] [] (tick_sched_handle) from [] (tick_sched_timer+0x64/0xd0) [ 494.861031] [] (tick_sched_timer) from [] (__hrtimer_run_queues.constprop.5+0x150/0x1e8) [ 494.870907] r7:ffffe000 r6:c0d165c0 r5:c0d16c80 r4:c0d16580 [ 494.876601] [] (__hrtimer_run_queues.constprop.5) from [] (hrtimer_interrupt+0x9c/0x248) [ 494.886479] r10:c0d16638 r9:c0d16580 r8:ffffffff r7:7fffffff r6:00000003 r5:ffffe000 [ 494.894342] r4:c0d16580 [ 494.896907] [] (hrtimer_interrupt) from [] (omap2_gp_timer_interrupt+0x30/0x38) [ 494.905999] r10:c0d4ec40 r9:cf006200 r8:00000010 r7:ce461d2c r6:00000000 r5:cf006200 [ 494.913863] r4:c0d07fb4 [ 494.916430] [] (omap2_gp_timer_interrupt) from [] (__handle_irq_event_percpu+0x6c/0x140) [ 494.926312] [] (__handle_irq_event_percpu) from [] (handle_irq_event_percpu+0x24/0x60) [ 494.936016] r10:cf4a855d r9:ce460000 r8:cf008000 r7:00000000 r6:00000000 r5:cf006200 [ 494.943879] r4:cf006200 [ 494.946433] [] (handle_irq_event_percpu) from [] (handle_irq_event+0x64/0x90) [ 494.955346] r5:00000010 r4:cf006200 [ 494.958949] [] (handle_irq_event) from [] (handle_level_irq+0xb4/0x158) [ 494.967338] r5:00000010 r4:cf006200 [ 494.970937] [] (handle_level_irq) from [] (generic_handle_irq+0x2c/0x3c) [ 494.979413] r5:00000010 r4:c0d4d6d0 [ 494.983012] [] (generic_handle_irq) from [] (__handle_domain_irq+0x5c/0xb0) [ 494.991758] [] (__handle_domain_irq) from [] (omap_intc_handle_irq+0x3c/0x98) [ 495.000677] r9:ce460000 r8:c0845b38 r7:ce461dfc r6:ffffffff r5:600b0113 r4:c0d823f0 [ 495.008462] [] (omap_intc_handle_irq) from [] (__irq_svc+0x6c/0xa8) [ 495.016501] Exception stack(0xce461dc8 to 0xce461e10) [ 495.021582] 1dc0: ce285200 00000002 00000000 ce461e18 00000000 00000000 [ 495.029803] 1de0: ce285200 ce398c00 c0845b38 c0846058 cf4a855d ce461e4c ce461e50 ce461e18 [ 495.038020] 1e00: c0845b38 c014bd10 600b0113 ffffffff [ 495.043094] r5:600b0113 r4:c014bd10 [ 495.046695] [] (finish_task_switch) from [] (__schedule+0x258/0x720) [ 495.054826] r8:cf7c3e00 r7:ce20ea80 r6:ce285200 r5:ce398c00 r4:c0d0f970 [ 495.061563] [] (__schedule) from [] (schedule+0x58/0xc4) [ 495.068650] r10:00000000 r9:00000000 r8:c0d76914 r7:00000001 r6:0000c350 r5:ffffe000 [ 495.076514] r4:ffffe000 [ 495.079067] [] (schedule) from [] (do_nanosleep+0xa8/0x1cc) [ 495.086409] r5:ffffe000 r4:ce461f18 [ 495.090009] [] (do_nanosleep) from [] (hrtimer_nanosleep+0xe4/0x174) [ 495.098142] r9:00000000 r8:0000c350 r7:00000001 r6:0000c350 r5:00000000 r4:00100590 [ 495.105929] [] (hrtimer_nanosleep) from [] (SyS_nanosleep+0x80/0x98) [ 495.114062] r10:00000000 r9:ce460000 r8:c0107f04 r7:000000a2 r6:000003e8 r5:00000106 [ 495.121926] r4:00000000 [ 495.124479] [] (SyS_nanosleep) from [] (ret_fast_syscall+0x0/0x54)