jarekt70
Posts: 2
Joined: Wed Dec 11, 2019 6:26 pm

Pi 4 freezes occasionally - kernel problems?

Wed Dec 11, 2019 7:03 pm

Hello,

My Pi 4 (4GB RAM) freezes for a while (few minutes for few hours) and unfreezes by itself. It happens irregularly, from time to time (once for several days). Every time it freezes, it provides kernel log like follows:

Code: Select all

[177601.499694] rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
[177601.499713] rcu:    (detected by 1, t=2102 jiffies, g=4984533, q=129)
[177601.499739] rcu: All QSes seen, last rcu_sched kthread activity 2100 (17729801-17727701), jiffies_till_next_fqs=1, root ->qsmask 0x0
[177601.499748] migration/1     R  running task        0    15      2 0x00000000
[177601.499801] [<c0212d10>] (unwind_backtrace) from [<c020d530>] (show_stack+0x20/0x24)
[177601.499821] [<c020d530>] (show_stack) from [<c024d1e8>] (sched_show_task.part.15+0xd0/0xfc)
[177601.499838] [<c024d1e8>] (sched_show_task.part.15) from [<c024d238>] (sched_show_task+0x24/0x28)
[177601.499855] [<c024d238>] (sched_show_task) from [<c0293c20>] (rcu_check_callbacks+0x888/0x968)
[177601.499874] [<c0293c20>] (rcu_check_callbacks) from [<c029bde8>] (update_process_times+0x40/0x6c)
[177601.499893] [<c029bde8>] (update_process_times) from [<c02ae718>] (tick_sched_handle+0x64/0x70)
[177601.499912] [<c02ae718>] (tick_sched_handle) from [<c02ae98c>] (tick_sched_timer+0x5c/0xb8)
[177601.499929] [<c02ae98c>] (tick_sched_timer) from [<c029c970>] (__hrtimer_run_queues+0x164/0x320)
[177601.499944] [<c029c970>] (__hrtimer_run_queues) from [<c029d590>] (hrtimer_interrupt+0x130/0x2a4)
[177601.499963] [<c029d590>] (hrtimer_interrupt) from [<c0811414>] (arch_timer_handler_phys+0x40/0x48)
[177601.499984] [<c0811414>] (arch_timer_handler_phys) from [<c02865c8>] (handle_percpu_devid_irq+0x88/0x23c)
[177601.500002] [<c02865c8>] (handle_percpu_devid_irq) from [<c02806b4>] (generic_handle_irq+0x34/0x44)
[177601.500020] [<c02806b4>] (generic_handle_irq) from [<c0280e04>] (__handle_domain_irq+0x6c/0xc4)
[177601.500039] [<c0280e04>] (__handle_domain_irq) from [<c0202244>] (gic_handle_irq+0x4c/0x88)
[177601.500054] [<c0202244>] (gic_handle_irq) from [<c02019bc>] (__irq_svc+0x5c/0x7c)
[177601.500063] Exception stack(0xef939e90 to 0xef939ed8)
[177601.500074] 9e80:                                     00000000 00000004 00000000 00000001
[177601.500086] 9ea0: d8d49e00 00000001 d8d49dec 00000000 a0000013 00000000 d8d49d8c ef939f04
[177601.500097] 9ec0: ef939f08 ef939ee0 c02d0a80 c02d0984 60000013 ffffffff
[177601.500112] [<c02019bc>] (__irq_svc) from [<c02d0984>] (multi_cpu_stop+0x64/0x170)
[177601.500127] [<c02d0984>] (multi_cpu_stop) from [<c02d0ce4>] (cpu_stopper_thread+0xc4/0x140)
[177601.500144] [<c02d0ce4>] (cpu_stopper_thread) from [<c02487b4>] (smpboot_thread_fn+0x138/0x1d0)
[177601.500159] [<c02487b4>] (smpboot_thread_fn) from [<c0244170>] (kthread+0x138/0x168)
[177601.500173] [<c0244170>] (kthread) from [<c02010ac>] (ret_from_fork+0x14/0x28)
[177601.500181] Exception stack(0xef939fb0 to 0xef939ff8)
[177601.500191] 9fa0:                                     00000000 00000000 00000000 00000000
[177601.500202] 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[177601.500212] 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[177601.500226] rcu: rcu_sched kthread starved for 2100 jiffies! g4984533 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
[177601.500233] rcu: RCU grace-period kthread stack dump:
[177601.500241] rcu_sched       R  running task        0    10      2 0x00000000
[177601.500277] [<c0997424>] (__schedule) from [<c0997a94>] (schedule+0x50/0xa8)
[177601.500295] [<c0997a94>] (schedule) from [<c099ba4c>] (schedule_timeout+0x1d0/0x428)
[177601.500313] [<c099ba4c>] (schedule_timeout) from [<c02902ec>] (rcu_gp_kthread+0x4ac/0xa30)
[177601.500327] [<c02902ec>] (rcu_gp_kthread) from [<c0244170>] (kthread+0x138/0x168)
[177601.500340] [<c0244170>] (kthread) from [<c02010ac>] (ret_from_fork+0x14/0x28)
[177601.500349] Exception stack(0xef921fb0 to 0xef921ff8)
[177601.500359] 1fa0:                                     00000000 00000000 00000000 00000000
[177601.500370] 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[177601.500379] 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[177664.550923] rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
[177664.550939] rcu:    (detected by 1, t=8407 jiffies, g=4984533, q=141)
[177664.550962] rcu: All QSes seen, last rcu_sched kthread activity 8405 (17736106-17727701), jiffies_till_next_fqs=1, root ->qsmask 0x0
[177664.550971] migration/1     R  running task        0    15      2 0x00000000
[177664.551013] [<c0212d10>] (unwind_backtrace) from [<c020d530>] (show_stack+0x20/0x24)
[177664.551029] [<c020d530>] (show_stack) from [<c024d1e8>] (sched_show_task.part.15+0xd0/0xfc)
[177664.551044] [<c024d1e8>] (sched_show_task.part.15) from [<c024d238>] (sched_show_task+0x24/0x28)
[177664.551061] [<c024d238>] (sched_show_task) from [<c0293c20>] (rcu_check_callbacks+0x888/0x968)
[177664.551078] [<c0293c20>] (rcu_check_callbacks) from [<c029bde8>] (update_process_times+0x40/0x6c)
[177664.551096] [<c029bde8>] (update_process_times) from [<c02ae718>] (tick_sched_handle+0x64/0x70)
[177664.551113] [<c02ae718>] (tick_sched_handle) from [<c02ae98c>] (tick_sched_timer+0x5c/0xb8)
[177664.551129] [<c02ae98c>] (tick_sched_timer) from [<c029c970>] (__hrtimer_run_queues+0x164/0x320)
[177664.551144] [<c029c970>] (__hrtimer_run_queues) from [<c029d590>] (hrtimer_interrupt+0x130/0x2a4)
[177664.551161] [<c029d590>] (hrtimer_interrupt) from [<c0811414>] (arch_timer_handler_phys+0x40/0x48)
[177664.551181] [<c0811414>] (arch_timer_handler_phys) from [<c02865c8>] (handle_percpu_devid_irq+0x88/0x23c)
[177664.551199] [<c02865c8>] (handle_percpu_devid_irq) from [<c02806b4>] (generic_handle_irq+0x34/0x44)
[177664.551216] [<c02806b4>] (generic_handle_irq) from [<c0280e04>] (__handle_domain_irq+0x6c/0xc4)
[177664.551234] [<c0280e04>] (__handle_domain_irq) from [<c0202244>] (gic_handle_irq+0x4c/0x88)
[177664.551248] [<c0202244>] (gic_handle_irq) from [<c02019bc>] (__irq_svc+0x5c/0x7c)
[177664.551256] Exception stack(0xef939e90 to 0xef939ed8)
[177664.551266] 9e80:                                     00000000 00000004 00000000 00000001
[177664.551278] 9ea0: d8d49e00 00000001 d8d49dec 00000000 a0000013 00000000 d8d49d8c ef939f04
[177664.551288] 9ec0: ef939f08 ef939ee0 c02d0a80 c02d0984 60000013 ffffffff
[177664.551303] [<c02019bc>] (__irq_svc) from [<c02d0984>] (multi_cpu_stop+0x64/0x170)
[177664.551317] [<c02d0984>] (multi_cpu_stop) from [<c02d0ce4>] (cpu_stopper_thread+0xc4/0x140)
[177664.551333] [<c02d0ce4>] (cpu_stopper_thread) from [<c02487b4>] (smpboot_thread_fn+0x138/0x1d0)
[177664.551348] [<c02487b4>] (smpboot_thread_fn) from [<c0244170>] (kthread+0x138/0x168)
[177664.551361] [<c0244170>] (kthread) from [<c02010ac>] (ret_from_fork+0x14/0x28)
[177664.551369] Exception stack(0xef939fb0 to 0xef939ff8)
[177664.551379] 9fa0:                                     00000000 00000000 00000000 00000000
[177664.551390] 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[177664.551400] 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[177664.551414] rcu: rcu_sched kthread starved for 8405 jiffies! g4984533 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
[177664.551421] rcu: RCU grace-period kthread stack dump:
[177664.551429] rcu_sched       R  running task        0    10      2 0x00000000
[177664.551464] [<c0997424>] (__schedule) from [<c0997a94>] (schedule+0x50/0xa8)
[177664.551480] [<c0997a94>] (schedule) from [<c099ba4c>] (schedule_timeout+0x1d0/0x428)
[177664.551497] [<c099ba4c>] (schedule_timeout) from [<c02902ec>] (rcu_gp_kthread+0x4ac/0xa30)
[177664.551511] [<c02902ec>] (rcu_gp_kthread) from [<c0244170>] (kthread+0x138/0x168)
[177664.551523] [<c0244170>] (kthread) from [<c02010ac>] (ret_from_fork+0x14/0x28)
[177664.551532] Exception stack(0xef921fb0 to 0xef921ff8)
[177664.551542] 1fa0:                                     00000000 00000000 00000000 00000000
[177664.551552] 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[177664.551562] 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[177727.602157] rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
[177727.602172] rcu:    (detected by 1, t=14712 jiffies, g=4984533, q=141)
[177727.602193] rcu: All QSes seen, last rcu_sched kthread activity 14710 (17742411-17727701), jiffies_till_next_fqs=1, root ->qsmask 0x0
[177727.602201] migration/1     R  running task        0    15      2 0x00000000
[177727.602234] [<c0212d10>] (unwind_backtrace) from [<c020d530>] (show_stack+0x20/0x24)
[177727.602249] [<c020d530>] (show_stack) from [<c024d1e8>] (sched_show_task.part.15+0xd0/0xfc)
[177727.602263] [<c024d1e8>] (sched_show_task.part.15) from [<c024d238>] (sched_show_task+0x24/0x28)
[177727.602278] [<c024d238>] (sched_show_task) from [<c0293c20>] (rcu_check_callbacks+0x888/0x968)
[177727.602294] [<c0293c20>] (rcu_check_callbacks) from [<c029bde8>] (update_process_times+0x40/0x6c)
[177727.602310] [<c029bde8>] (update_process_times) from [<c02ae718>] (tick_sched_handle+0x64/0x70)
[177727.602327] [<c02ae718>] (tick_sched_handle) from [<c02ae98c>] (tick_sched_timer+0x5c/0xb8)
[177727.602343] [<c02ae98c>] (tick_sched_timer) from [<c029c970>] (__hrtimer_run_queues+0x164/0x320)
[177727.602358] [<c029c970>] (__hrtimer_run_queues) from [<c029d590>] (hrtimer_interrupt+0x130/0x2a4)
[177727.602374] [<c029d590>] (hrtimer_interrupt) from [<c0811414>] (arch_timer_handler_phys+0x40/0x48)
[177727.602392] [<c0811414>] (arch_timer_handler_phys) from [<c02865c8>] (handle_percpu_devid_irq+0x88/0x23c)
[177727.602409] [<c02865c8>] (handle_percpu_devid_irq) from [<c02806b4>] (generic_handle_irq+0x34/0x44)
[177727.602426] [<c02806b4>] (generic_handle_irq) from [<c0280e04>] (__handle_domain_irq+0x6c/0xc4)
[177727.602442] [<c0280e04>] (__handle_domain_irq) from [<c0202244>] (gic_handle_irq+0x4c/0x88)
[177727.602456] [<c0202244>] (gic_handle_irq) from [<c02019bc>] (__irq_svc+0x5c/0x7c)
[177727.602465] Exception stack(0xef939e90 to 0xef939ed8)
[177727.602475] 9e80:                                     00000000 00000004 00000000 00000001
[177727.602487] 9ea0: d8d49e00 00000001 d8d49dec 00000000 a0000013 00000000 d8d49d8c ef939f04
[177727.602497] 9ec0: ef939f08 ef939ee0 c02d0a80 c02d0984 60000013 ffffffff
[177727.602511] [<c02019bc>] (__irq_svc) from [<c02d0984>] (multi_cpu_stop+0x64/0x170)
[177727.602524] [<c02d0984>] (multi_cpu_stop) from [<c02d0ce4>] (cpu_stopper_thread+0xc4/0x140)
[177727.602541] [<c02d0ce4>] (cpu_stopper_thread) from [<c02487b4>] (smpboot_thread_fn+0x138/0x1d0)
[177727.602555] [<c02487b4>] (smpboot_thread_fn) from [<c0244170>] (kthread+0x138/0x168)
[177727.602568] [<c0244170>] (kthread) from [<c02010ac>] (ret_from_fork+0x14/0x28)
[177727.602576] Exception stack(0xef939fb0 to 0xef939ff8)
[177727.602586] 9fa0:                                     00000000 00000000 00000000 00000000
[177727.602596] 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[177727.602606] 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[177727.602619] rcu: rcu_sched kthread starved for 14710 jiffies! g4984533 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
[177727.602626] rcu: RCU grace-period kthread stack dump:
[177727.602633] rcu_sched       R  running task        0    10      2 0x00000000
[177727.602667] [<c0997424>] (__schedule) from [<c0997a94>] (schedule+0x50/0xa8)
[177727.602684] [<c0997a94>] (schedule) from [<c099ba4c>] (schedule_timeout+0x1d0/0x428)
[177727.602701] [<c099ba4c>] (schedule_timeout) from [<c02902ec>] (rcu_gp_kthread+0x4ac/0xa30)
[177727.602714] [<c02902ec>] (rcu_gp_kthread) from [<c0244170>] (kthread+0x138/0x168)
[177727.602727] [<c0244170>] (kthread) from [<c02010ac>] (ret_from_fork+0x14/0x28)
[177727.602736] Exception stack(0xef921fb0 to 0xef921ff8)
[177727.602745] 1fa0:                                     00000000 00000000 00000000 00000000
[177727.602756] 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[177727.602766] 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[177790.653390] rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
[177790.653404] rcu:    (detected by 1, t=21017 jiffies, g=4984533, q=141)
[177790.653426] rcu: All QSes seen, last rcu_sched kthread activity 21015 (17748716-17727701), jiffies_till_next_fqs=1, root ->qsmask 0x0
[177790.653433] migration/1     R  running task        0    15      2 0x00000000
[177790.653465] [<c0212d10>] (unwind_backtrace) from [<c020d530>] (show_stack+0x20/0x24)
[177790.653480] [<c020d530>] (show_stack) from [<c024d1e8>] (sched_show_task.part.15+0xd0/0xfc)
[177790.653494] [<c024d1e8>] (sched_show_task.part.15) from [<c024d238>] (sched_show_task+0x24/0x28)
[177790.653509] [<c024d238>] (sched_show_task) from [<c0293c20>] (rcu_check_callbacks+0x888/0x968)
[177790.653524] [<c0293c20>] (rcu_check_callbacks) from [<c029bde8>] (update_process_times+0x40/0x6c)
[177790.653540] [<c029bde8>] (update_process_times) from [<c02ae718>] (tick_sched_handle+0x64/0x70)
[177790.653557] [<c02ae718>] (tick_sched_handle) from [<c02ae98c>] (tick_sched_timer+0x5c/0xb8)
[177790.653573] [<c02ae98c>] (tick_sched_timer) from [<c029c970>] (__hrtimer_run_queues+0x164/0x320)
[177790.653587] [<c029c970>] (__hrtimer_run_queues) from [<c029d590>] (hrtimer_interrupt+0x130/0x2a4)
[177790.653603] [<c029d590>] (hrtimer_interrupt) from [<c0811414>] (arch_timer_handler_phys+0x40/0x48)
[177790.653620] [<c0811414>] (arch_timer_handler_phys) from [<c02865c8>] (handle_percpu_devid_irq+0x88/0x23c)
[177790.653636] [<c02865c8>] (handle_percpu_devid_irq) from [<c02806b4>] (generic_handle_irq+0x34/0x44)
[177790.653654] [<c02806b4>] (generic_handle_irq) from [<c0280e04>] (__handle_domain_irq+0x6c/0xc4)
[177790.653670] [<c0280e04>] (__handle_domain_irq) from [<c0202244>] (gic_handle_irq+0x4c/0x88)
[177790.653684] [<c0202244>] (gic_handle_irq) from [<c02019bc>] (__irq_svc+0x5c/0x7c)
[177790.653693] Exception stack(0xef939e90 to 0xef939ed8)
[177790.653703] 9e80:                                     00000000 00000004 00000000 00000001
[177790.653714] 9ea0: d8d49e00 00000001 d8d49dec 00000000 a0000013 00000000 d8d49d8c ef939f04
[177790.653725] 9ec0: ef939f08 ef939ee0 c02d0a80 c02d0984 60000013 ffffffff
[177790.653739] [<c02019bc>] (__irq_svc) from [<c02d0984>] (multi_cpu_stop+0x64/0x170)
[177790.653752] [<c02d0984>] (multi_cpu_stop) from [<c02d0ce4>] (cpu_stopper_thread+0xc4/0x140)
[177790.653768] [<c02d0ce4>] (cpu_stopper_thread) from [<c02487b4>] (smpboot_thread_fn+0x138/0x1d0)
[177790.653783] [<c02487b4>] (smpboot_thread_fn) from [<c0244170>] (kthread+0x138/0x168)
[177790.653795] [<c0244170>] (kthread) from [<c02010ac>] (ret_from_fork+0x14/0x28)
[177790.653804] Exception stack(0xef939fb0 to 0xef939ff8)
[177790.653813] 9fa0:                                     00000000 00000000 00000000 00000000
[177790.653824] 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[177790.653834] 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[177790.653846] rcu: rcu_sched kthread starved for 21015 jiffies! g4984533 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
[177790.653853] rcu: RCU grace-period kthread stack dump:
[177790.653860] rcu_sched       R  running task        0    10      2 0x00000000
[177790.653892] [<c0997424>] (__schedule) from [<c0997a94>] (schedule+0x50/0xa8)
[177790.653909] [<c0997a94>] (schedule) from [<c099ba4c>] (schedule_timeout+0x1d0/0x428)
[177790.653925] [<c099ba4c>] (schedule_timeout) from [<c02902ec>] (rcu_gp_kthread+0x4ac/0xa30)
[177790.653938] [<c02902ec>] (rcu_gp_kthread) from [<c0244170>] (kthread+0x138/0x168)
[177790.653951] [<c0244170>] (kthread) from [<c02010ac>] (ret_from_fork+0x14/0x28)
[177790.653959] Exception stack(0xef921fb0 to 0xef921ff8)
[177790.653969] 1fa0:                                     00000000 00000000 00000000 00000000
[177790.653979] 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[177790.653989] 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[177853.704624] rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
[177853.704638] rcu:    (detected by 1, t=27322 jiffies, g=4984533, q=141)
[177853.704659] rcu: All QSes seen, last rcu_sched kthread activity 27320 (17755021-17727701), jiffies_till_next_fqs=1, root ->qsmask 0x0
[177853.704667] migration/1     R  running task        0    15      2 0x00000000
[177853.704699] [<c0212d10>] (unwind_backtrace) from [<c020d530>] (show_stack+0x20/0x24)
[177853.704713] [<c020d530>] (show_stack) from [<c024d1e8>] (sched_show_task.part.15+0xd0/0xfc)
[177853.704727] [<c024d1e8>] (sched_show_task.part.15) from [<c024d238>] (sched_show_task+0x24/0x28)
[177853.704742] [<c024d238>] (sched_show_task) from [<c0293c20>] (rcu_check_callbacks+0x888/0x968)
[177853.704758] [<c0293c20>] (rcu_check_callbacks) from [<c029bde8>] (update_process_times+0x40/0x6c)
[177853.704774] [<c029bde8>] (update_process_times) from [<c02ae718>] (tick_sched_handle+0x64/0x70)
[177853.704790] [<c02ae718>] (tick_sched_handle) from [<c02ae98c>] (tick_sched_timer+0x5c/0xb8)
[177853.704806] [<c02ae98c>] (tick_sched_timer) from [<c029c970>] (__hrtimer_run_queues+0x164/0x320)
[177853.704821] [<c029c970>] (__hrtimer_run_queues) from [<c029d590>] (hrtimer_interrupt+0x130/0x2a4)
[177853.704837] [<c029d590>] (hrtimer_interrupt) from [<c0811414>] (arch_timer_handler_phys+0x40/0x48)
[177853.704853] [<c0811414>] (arch_timer_handler_phys) from [<c02865c8>] (handle_percpu_devid_irq+0x88/0x23c)
[177853.704870] [<c02865c8>] (handle_percpu_devid_irq) from [<c02806b4>] (generic_handle_irq+0x34/0x44)
[177853.704887] [<c02806b4>] (generic_handle_irq) from [<c0280e04>] (__handle_domain_irq+0x6c/0xc4)
[177853.704904] [<c0280e04>] (__handle_domain_irq) from [<c0202244>] (gic_handle_irq+0x4c/0x88)
[177853.704917] [<c0202244>] (gic_handle_irq) from [<c02019bc>] (__irq_svc+0x5c/0x7c)
[177853.704926] Exception stack(0xef939e90 to 0xef939ed8)
[177853.704935] 9e80:                                     00000000 00000004 00000000 00000001
[177853.704947] 9ea0: d8d49e00 00000001 d8d49dec 00000000 a0000013 00000000 d8d49d8c ef939f04
[177853.704958] 9ec0: ef939f08 ef939ee0 c02d0a80 c02d0984 60000013 ffffffff
[177853.704972] [<c02019bc>] (__irq_svc) from [<c02d0984>] (multi_cpu_stop+0x64/0x170)
[177853.704985] [<c02d0984>] (multi_cpu_stop) from [<c02d0ce4>] (cpu_stopper_thread+0xc4/0x140)
[177853.705000] [<c02d0ce4>] (cpu_stopper_thread) from [<c02487b4>] (smpboot_thread_fn+0x138/0x1d0)
[177853.705014] [<c02487b4>] (smpboot_thread_fn) from [<c0244170>] (kthread+0x138/0x168)
[177853.705027] [<c0244170>] (kthread) from [<c02010ac>] (ret_from_fork+0x14/0x28)
[177853.705035] Exception stack(0xef939fb0 to 0xef939ff8)
[177853.705045] 9fa0:                                     00000000 00000000 00000000 00000000
[177853.705056] 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[177853.705065] 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[177853.705077] rcu: rcu_sched kthread starved for 27320 jiffies! g4984533 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
[177853.705084] rcu: RCU grace-period kthread stack dump:
[177853.705091] rcu_sched       R  running task        0    10      2 0x00000000
[177853.705123] [<c0997424>] (__schedule) from [<c0997a94>] (schedule+0x50/0xa8)
[177853.705140] [<c0997a94>] (schedule) from [<c099ba4c>] (schedule_timeout+0x1d0/0x428)
[177853.705156] [<c099ba4c>] (schedule_timeout) from [<c02902ec>] (rcu_gp_kthread+0x4ac/0xa30)
[177853.705170] [<c02902ec>] (rcu_gp_kthread) from [<c0244170>] (kthread+0x138/0x168)
[177853.705182] [<c0244170>] (kthread) from [<c02010ac>] (ret_from_fork+0x14/0x28)
[177853.705190] Exception stack(0xef921fb0 to 0xef921ff8)
[177853.705200] 1fa0:                                     00000000 00000000 00000000 00000000
[177853.705211] 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[177853.705220] 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[177916.755858] rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
[177916.755873] rcu:    (detected by 1, t=33627 jiffies, g=4984533, q=141)
[177916.755893] rcu: All QSes seen, last rcu_sched kthread activity 33625 (17761326-17727701), jiffies_till_next_fqs=1, root ->qsmask 0x0
[177916.755900] migration/1     R  running task        0    15      2 0x00000000
[177916.755932] [<c0212d10>] (unwind_backtrace) from [<c020d530>] (show_stack+0x20/0x24)
[177916.755946] [<c020d530>] (show_stack) from [<c024d1e8>] (sched_show_task.part.15+0xd0/0xfc)
[177916.755960] [<c024d1e8>] (sched_show_task.part.15) from [<c024d238>] (sched_show_task+0x24/0x28)
[177916.755976] [<c024d238>] (sched_show_task) from [<c0293c20>] (rcu_check_callbacks+0x888/0x968)
[177916.755991] [<c0293c20>] (rcu_check_callbacks) from [<c029bde8>] (update_process_times+0x40/0x6c)
[177916.756007] [<c029bde8>] (update_process_times) from [<c02ae718>] (tick_sched_handle+0x64/0x70)
[177916.756024] [<c02ae718>] (tick_sched_handle) from [<c02ae98c>] (tick_sched_timer+0x5c/0xb8)
[177916.756039] [<c02ae98c>] (tick_sched_timer) from [<c029c970>] (__hrtimer_run_queues+0x164/0x320)
[177916.756055] [<c029c970>] (__hrtimer_run_queues) from [<c029d590>] (hrtimer_interrupt+0x130/0x2a4)
[177916.756071] [<c029d590>] (hrtimer_interrupt) from [<c0811414>] (arch_timer_handler_phys+0x40/0x48)
[177916.756087] [<c0811414>] (arch_timer_handler_phys) from [<c02865c8>] (handle_percpu_devid_irq+0x88/0x23c)
[177916.756103] [<c02865c8>] (handle_percpu_devid_irq) from [<c02806b4>] (generic_handle_irq+0x34/0x44)
[177916.756121] [<c02806b4>] (generic_handle_irq) from [<c0280e04>] (__handle_domain_irq+0x6c/0xc4)
[177916.756137] [<c0280e04>] (__handle_domain_irq) from [<c0202244>] (gic_handle_irq+0x4c/0x88)
[177916.756151] [<c0202244>] (gic_handle_irq) from [<c02019bc>] (__irq_svc+0x5c/0x7c)
[177916.756159] Exception stack(0xef939e90 to 0xef939ed8)
[177916.756169] 9e80:                                     00000000 00000004 00000000 00000001
[177916.756181] 9ea0: d8d49e00 00000001 d8d49dec 00000000 a0000013 00000000 d8d49d8c ef939f04
[177916.756192] 9ec0: ef939f08 ef939ee0 c02d0a80 c02d0984 60000013 ffffffff
[177916.756205] [<c02019bc>] (__irq_svc) from [<c02d0984>] (multi_cpu_stop+0x64/0x170)
[177916.756218] [<c02d0984>] (multi_cpu_stop) from [<c02d0ce4>] (cpu_stopper_thread+0xc4/0x140)
[177916.756234] [<c02d0ce4>] (cpu_stopper_thread) from [<c02487b4>] (smpboot_thread_fn+0x138/0x1d0)
[177916.756248] [<c02487b4>] (smpboot_thread_fn) from [<c0244170>] (kthread+0x138/0x168)
[177916.756261] [<c0244170>] (kthread) from [<c02010ac>] (ret_from_fork+0x14/0x28)
[177916.756270] Exception stack(0xef939fb0 to 0xef939ff8)
[177916.756279] 9fa0:                                     00000000 00000000 00000000 00000000
[177916.756290] 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[177916.756300] 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[177916.756311] rcu: rcu_sched kthread starved for 33625 jiffies! g4984533 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
[177916.756318] rcu: RCU grace-period kthread stack dump:
[177916.756325] rcu_sched       R  running task        0    10      2 0x00000000
[177916.756357] [<c0997424>] (__schedule) from [<c0997a94>] (schedule+0x50/0xa8)
[177916.756373] [<c0997a94>] (schedule) from [<c099ba4c>] (schedule_timeout+0x1d0/0x428)
[177916.756389] [<c099ba4c>] (schedule_timeout) from [<c02902ec>] (rcu_gp_kthread+0x4ac/0xa30)
[177916.756403] [<c02902ec>] (rcu_gp_kthread) from [<c0244170>] (kthread+0x138/0x168)
[177916.756415] [<c0244170>] (kthread) from [<c02010ac>] (ret_from_fork+0x14/0x28)
[177916.756424] Exception stack(0xef921fb0 to 0xef921ff8)
[177916.756433] 1fa0:                                     00000000 00000000 00000000 00000000
[177916.756444] 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[177916.756454] 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[177979.807093] rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
[177979.807108] rcu:    (detected by 1, t=39932 jiffies, g=4984533, q=141)
[177979.807128] rcu: All QSes seen, last rcu_sched kthread activity 39930 (17767631-17727701), jiffies_till_next_fqs=1, root ->qsmask 0x0
[177979.807136] migration/1     R  running task        0    15      2 0x00000000
[177979.807168] [<c0212d10>] (unwind_backtrace) from [<c020d530>] (show_stack+0x20/0x24)
[177979.807182] [<c020d530>] (show_stack) from [<c024d1e8>] (sched_show_task.part.15+0xd0/0xfc)
[177979.807196] [<c024d1e8>] (sched_show_task.part.15) from [<c024d238>] (sched_show_task+0x24/0x28)
[177979.807211] [<c024d238>] (sched_show_task) from [<c0293c20>] (rcu_check_callbacks+0x888/0x968)
[177979.807226] [<c0293c20>] (rcu_check_callbacks) from [<c029bde8>] (update_process_times+0x40/0x6c)
[177979.807242] [<c029bde8>] (update_process_times) from [<c02ae718>] (tick_sched_handle+0x64/0x70)
[177979.807259] [<c02ae718>] (tick_sched_handle) from [<c02ae98c>] (tick_sched_timer+0x5c/0xb8)
[177979.807274] [<c02ae98c>] (tick_sched_timer) from [<c029c970>] (__hrtimer_run_queues+0x164/0x320)
[177979.807289] [<c029c970>] (__hrtimer_run_queues) from [<c029d590>] (hrtimer_interrupt+0x130/0x2a4)
[177979.807305] [<c029d590>] (hrtimer_interrupt) from [<c0811414>] (arch_timer_handler_phys+0x40/0x48)
[177979.807321] [<c0811414>] (arch_timer_handler_phys) from [<c02865c8>] (handle_percpu_devid_irq+0x88/0x23c)
[177979.807338] [<c02865c8>] (handle_percpu_devid_irq) from [<c02806b4>] (generic_handle_irq+0x34/0x44)
[177979.807356] [<c02806b4>] (generic_handle_irq) from [<c0280e04>] (__handle_domain_irq+0x6c/0xc4)
[177979.807372] [<c0280e04>] (__handle_domain_irq) from [<c0202244>] (gic_handle_irq+0x4c/0x88)
[177979.807386] [<c0202244>] (gic_handle_irq) from [<c02019bc>] (__irq_svc+0x5c/0x7c)
[177979.807394] Exception stack(0xef939e90 to 0xef939ed8)
[177979.807404] 9e80:                                     00000000 00000004 00000000 00000001
[177979.807415] 9ea0: d8d49e00 00000001 d8d49dec 00000000 a0000013 00000000 d8d49d8c ef939f04
[177979.807426] 9ec0: ef939f08 ef939ee0 c02d0a80 c02d0984 60000013 ffffffff
[177979.807439] [<c02019bc>] (__irq_svc) from [<c02d0984>] (multi_cpu_stop+0x64/0x170)
[177979.807452] [<c02d0984>] (multi_cpu_stop) from [<c02d0ce4>] (cpu_stopper_thread+0xc4/0x140)
[177979.807468] [<c02d0ce4>] (cpu_stopper_thread) from [<c02487b4>] (smpboot_thread_fn+0x138/0x1d0)
[177979.807483] [<c02487b4>] (smpboot_thread_fn) from [<c0244170>] (kthread+0x138/0x168)
[177979.807496] [<c0244170>] (kthread) from [<c02010ac>] (ret_from_fork+0x14/0x28)
[177979.807504] Exception stack(0xef939fb0 to 0xef939ff8)
[177979.807513] 9fa0:                                     00000000 00000000 00000000 00000000
[177979.807524] 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[177979.807534] 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[177979.807546] rcu: rcu_sched kthread starved for 39930 jiffies! g4984533 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
[177979.807553] rcu: RCU grace-period kthread stack dump:
[177979.807560] rcu_sched       R  running task        0    10      2 0x00000000
[177979.807592] [<c0997424>] (__schedule) from [<c0997a94>] (schedule+0x50/0xa8)
[177979.807608] [<c0997a94>] (schedule) from [<c099ba4c>] (schedule_timeout+0x1d0/0x428)
[177979.807624] [<c099ba4c>] (schedule_timeout) from [<c02902ec>] (rcu_gp_kthread+0x4ac/0xa30)
[177979.807638] [<c02902ec>] (rcu_gp_kthread) from [<c0244170>] (kthread+0x138/0x168)
[177979.807650] [<c0244170>] (kthread) from [<c02010ac>] (ret_from_fork+0x14/0x28)
[177979.807659] Exception stack(0xef921fb0 to 0xef921ff8)
[177979.807668] 1fa0:                                     00000000 00000000 00000000 00000000
[177979.807678] 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[177979.807689] 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[178042.858328] rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
[178042.858342] rcu:    (detected by 1, t=46237 jiffies, g=4984533, q=141)
[178042.858363] rcu: All QSes seen, last rcu_sched kthread activity 46235 (17773936-17727701), jiffies_till_next_fqs=1, root ->qsmask 0x0
[178042.858370] migration/1     R  running task        0    15      2 0x00000000
[178042.858401] [<c0212d10>] (unwind_backtrace) from [<c020d530>] (show_stack+0x20/0x24)
[178042.858415] [<c020d530>] (show_stack) from [<c024d1e8>] (sched_show_task.part.15+0xd0/0xfc)
[178042.858429] [<c024d1e8>] (sched_show_task.part.15) from [<c024d238>] (sched_show_task+0x24/0x28)
[178042.858444] [<c024d238>] (sched_show_task) from [<c0293c20>] (rcu_check_callbacks+0x888/0x968)
[178042.858459] [<c0293c20>] (rcu_check_callbacks) from [<c029bde8>] (update_process_times+0x40/0x6c)
[178042.858475] [<c029bde8>] (update_process_times) from [<c02ae718>] (tick_sched_handle+0x64/0x70)
[178042.858492] [<c02ae718>] (tick_sched_handle) from [<c02ae98c>] (tick_sched_timer+0x5c/0xb8)
[178042.858507] [<c02ae98c>] (tick_sched_timer) from [<c029c970>] (__hrtimer_run_queues+0x164/0x320)
[178042.858522] [<c029c970>] (__hrtimer_run_queues) from [<c029d590>] (hrtimer_interrupt+0x130/0x2a4)
[178042.858538] [<c029d590>] (hrtimer_interrupt) from [<c0811414>] (arch_timer_handler_phys+0x40/0x48)
[178042.858554] [<c0811414>] (arch_timer_handler_phys) from [<c02865c8>] (handle_percpu_devid_irq+0x88/0x23c)
[178042.858571] [<c02865c8>] (handle_percpu_devid_irq) from [<c02806b4>] (generic_handle_irq+0x34/0x44)
[178042.858588] [<c02806b4>] (generic_handle_irq) from [<c0280e04>] (__handle_domain_irq+0x6c/0xc4)
[178042.858605] [<c0280e04>] (__handle_domain_irq) from [<c0202244>] (gic_handle_irq+0x4c/0x88)
[178042.858618] [<c0202244>] (gic_handle_irq) from [<c02019bc>] (__irq_svc+0x5c/0x7c)
[178042.858626] Exception stack(0xef939e90 to 0xef939ed8)
[178042.858636] 9e80:                                     00000000 00000004 00000000 00000001
[178042.858648] 9ea0: d8d49e00 00000001 d8d49dec 00000000 a0000013 00000000 d8d49d8c ef939f04
[178042.858658] 9ec0: ef939f08 ef939ee0 c02d0a80 c02d0984 60000013 ffffffff
[178042.858671] [<c02019bc>] (__irq_svc) from [<c02d0984>] (multi_cpu_stop+0x64/0x170)
[178042.858684] [<c02d0984>] (multi_cpu_stop) from [<c02d0ce4>] (cpu_stopper_thread+0xc4/0x140)
[178042.858700] [<c02d0ce4>] (cpu_stopper_thread) from [<c02487b4>] (smpboot_thread_fn+0x138/0x1d0)
[178042.858715] [<c02487b4>] (smpboot_thread_fn) from [<c0244170>] (kthread+0x138/0x168)
[178042.858727] [<c0244170>] (kthread) from [<c02010ac>] (ret_from_fork+0x14/0x28)
[178042.858736] Exception stack(0xef939fb0 to 0xef939ff8)
[178042.858745] 9fa0:                                     00000000 00000000 00000000 00000000
[178042.858756] 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[178042.858766] 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[178042.858777] rcu: rcu_sched kthread starved for 46235 jiffies! g4984533 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
[178042.858785] rcu: RCU grace-period kthread stack dump:
[178042.858792] rcu_sched       R  running task        0    10      2 0x00000000
[178042.858823] [<c0997424>] (__schedule) from [<c0997a94>] (schedule+0x50/0xa8)
[178042.858840] [<c0997a94>] (schedule) from [<c099ba4c>] (schedule_timeout+0x1d0/0x428)
[178042.858855] [<c099ba4c>] (schedule_timeout) from [<c02902ec>] (rcu_gp_kthread+0x4ac/0xa30)
[178042.858869] [<c02902ec>] (rcu_gp_kthread) from [<c0244170>] (kthread+0x138/0x168)
[178042.858881] [<c0244170>] (kthread) from [<c02010ac>] (ret_from_fork+0x14/0x28)
[178042.858890] Exception stack(0xef921fb0 to 0xef921ff8)
[178042.858899] 1fa0:                                     00000000 00000000 00000000 00000000
[178042.858910] 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[178042.858920] 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[178105.909563] rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
[178105.909578] rcu:    (detected by 1, t=52542 jiffies, g=4984533, q=141)
[178105.909597] rcu: All QSes seen, last rcu_sched kthread activity 52540 (17780241-17727701), jiffies_till_next_fqs=1, root ->qsmask 0x0
[178105.909605] migration/1     R  running task        0    15      2 0x00000000
[178105.909636] [<c0212d10>] (unwind_backtrace) from [<c020d530>] (show_stack+0x20/0x24)
[178105.909650] [<c020d530>] (show_stack) from [<c024d1e8>] (sched_show_task.part.15+0xd0/0xfc)
[178105.909663] [<c024d1e8>] (sched_show_task.part.15) from [<c024d238>] (sched_show_task+0x24/0x28)
[178105.909679] [<c024d238>] (sched_show_task) from [<c0293c20>] (rcu_check_callbacks+0x888/0x968)
[178105.909693] [<c0293c20>] (rcu_check_callbacks) from [<c029bde8>] (update_process_times+0x40/0x6c)
[178105.909709] [<c029bde8>] (update_process_times) from [<c02ae718>] (tick_sched_handle+0x64/0x70)
[178105.909726] [<c02ae718>] (tick_sched_handle) from [<c02ae98c>] (tick_sched_timer+0x5c/0xb8)
[178105.909741] [<c02ae98c>] (tick_sched_timer) from [<c029c970>] (__hrtimer_run_queues+0x164/0x320)
[178105.909756] [<c029c970>] (__hrtimer_run_queues) from [<c029d590>] (hrtimer_interrupt+0x130/0x2a4)
[178105.909772] [<c029d590>] (hrtimer_interrupt) from [<c0811414>] (arch_timer_handler_phys+0x40/0x48)
[178105.909788] [<c0811414>] (arch_timer_handler_phys) from [<c02865c8>] (handle_percpu_devid_irq+0x88/0x23c)
[178105.909804] [<c02865c8>] (handle_percpu_devid_irq) from [<c02806b4>] (generic_handle_irq+0x34/0x44)
[178105.909822] [<c02806b4>] (generic_handle_irq) from [<c0280e04>] (__handle_domain_irq+0x6c/0xc4)
[178105.909838] [<c0280e04>] (__handle_domain_irq) from [<c0202244>] (gic_handle_irq+0x4c/0x88)
[178105.909852] [<c0202244>] (gic_handle_irq) from [<c02019bc>] (__irq_svc+0x5c/0x7c)
[178105.909860] Exception stack(0xef939e90 to 0xef939ed8)
[178105.909870] 9e80:                                     00000000 00000004 00000000 00000001
[178105.909881] 9ea0: d8d49e00 00000001 d8d49dec 00000000 a0000013 00000000 d8d49d8c ef939f04
[178105.909891] 9ec0: ef939f08 ef939ee0 c02d0a80 c02d0984 60000013 ffffffff
[178105.909905] [<c02019bc>] (__irq_svc) from [<c02d0984>] (multi_cpu_stop+0x64/0x170)
[178105.909917] [<c02d0984>] (multi_cpu_stop) from [<c02d0ce4>] (cpu_stopper_thread+0xc4/0x140)
[178105.909933] [<c02d0ce4>] (cpu_stopper_thread) from [<c02487b4>] (smpboot_thread_fn+0x138/0x1d0)
[178105.909947] [<c02487b4>] (smpboot_thread_fn) from [<c0244170>] (kthread+0x138/0x168)
[178105.909960] [<c0244170>] (kthread) from [<c02010ac>] (ret_from_fork+0x14/0x28)
[178105.909968] Exception stack(0xef939fb0 to 0xef939ff8)
[178105.909977] 9fa0:                                     00000000 00000000 00000000 00000000
[178105.909988] 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[178105.909998] 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[178105.910009] rcu: rcu_sched kthread starved for 52540 jiffies! g4984533 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
[178105.910016] rcu: RCU grace-period kthread stack dump:
[178105.910023] rcu_sched       R  running task        0    10      2 0x00000000
[178105.910055] [<c0997424>] (__schedule) from [<c0997a94>] (schedule+0x50/0xa8)
[178105.910072] [<c0997a94>] (schedule) from [<c099ba4c>] (schedule_timeout+0x1d0/0x428)
[178105.910088] [<c099ba4c>] (schedule_timeout) from [<c02902ec>] (rcu_gp_kthread+0x4ac/0xa30)
[178105.910101] [<c02902ec>] (rcu_gp_kthread) from [<c0244170>] (kthread+0x138/0x168)
[178105.910114] [<c0244170>] (kthread) from [<c02010ac>] (ret_from_fork+0x14/0x28)
[178105.910122] Exception stack(0xef921fb0 to 0xef921ff8)
[178105.910131] 1fa0:                                     00000000 00000000 00000000 00000000
[178105.910142] 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[178105.910152] 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[178168.960799] rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
[178168.960813] rcu:    (detected by 1, t=58847 jiffies, g=4984533, q=141)
[178168.960833] rcu: All QSes seen, last rcu_sched kthread activity 58845 (17786546-17727701), jiffies_till_next_fqs=1, root ->qsmask 0x0
[178168.960840] migration/1     R  running task        0    15      2 0x00000000
[178168.960871] [<c0212d10>] (unwind_backtrace) from [<c020d530>] (show_stack+0x20/0x24)
[178168.960885] [<c020d530>] (show_stack) from [<c024d1e8>] (sched_show_task.part.15+0xd0/0xfc)
[178168.960898] [<c024d1e8>] (sched_show_task.part.15) from [<c024d238>] (sched_show_task+0x24/0x28)
[178168.960913] [<c024d238>] (sched_show_task) from [<c0293c20>] (rcu_check_callbacks+0x888/0x968)
[178168.960928] [<c0293c20>] (rcu_check_callbacks) from [<c029bde8>] (update_process_times+0x40/0x6c)
[178168.960944] [<c029bde8>] (update_process_times) from [<c02ae718>] (tick_sched_handle+0x64/0x70)
[178168.960961] [<c02ae718>] (tick_sched_handle) from [<c02ae98c>] (tick_sched_timer+0x5c/0xb8)
[178168.960976] [<c02ae98c>] (tick_sched_timer) from [<c029c970>] (__hrtimer_run_queues+0x164/0x320)
[178168.960991] [<c029c970>] (__hrtimer_run_queues) from [<c029d590>] (hrtimer_interrupt+0x130/0x2a4)
[178168.961007] [<c029d590>] (hrtimer_interrupt) from [<c0811414>] (arch_timer_handler_phys+0x40/0x48)
[178168.961023] [<c0811414>] (arch_timer_handler_phys) from [<c02865c8>] (handle_percpu_devid_irq+0x88/0x23c)
[178168.961039] [<c02865c8>] (handle_percpu_devid_irq) from [<c02806b4>] (generic_handle_irq+0x34/0x44)
[178168.961057] [<c02806b4>] (generic_handle_irq) from [<c0280e04>] (__handle_domain_irq+0x6c/0xc4)
[178168.961073] [<c0280e04>] (__handle_domain_irq) from [<c0202244>] (gic_handle_irq+0x4c/0x88)
[178168.961087] [<c0202244>] (gic_handle_irq) from [<c02019bc>] (__irq_svc+0x5c/0x7c)
[178168.961095] Exception stack(0xef939e90 to 0xef939ed8)
[178168.961105] 9e80:                                     00000000 00000004 00000000 00000001
[178168.961116] 9ea0: d8d49e00 00000001 d8d49dec 00000000 a0000013 00000000 d8d49d8c ef939f04
[178168.961126] 9ec0: ef939f08 ef939ee0 c02d0a80 c02d0984 60000013 ffffffff
[178168.961140] [<c02019bc>] (__irq_svc) from [<c02d0984>] (multi_cpu_stop+0x64/0x170)
[178168.961152] [<c02d0984>] (multi_cpu_stop) from [<c02d0ce4>] (cpu_stopper_thread+0xc4/0x140)
[178168.961168] [<c02d0ce4>] (cpu_stopper_thread) from [<c02487b4>] (smpboot_thread_fn+0x138/0x1d0)
[178168.961182] [<c02487b4>] (smpboot_thread_fn) from [<c0244170>] (kthread+0x138/0x168)
[178168.961195] [<c0244170>] (kthread) from [<c02010ac>] (ret_from_fork+0x14/0x28)
[178168.961203] Exception stack(0xef939fb0 to 0xef939ff8)
[178168.961212] 9fa0:                                     00000000 00000000 00000000 00000000
[178168.961223] 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[178168.961233] 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[178168.961244] rcu: rcu_sched kthread starved for 58845 jiffies! g4984533 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
[178168.961251] rcu: RCU grace-period kthread stack dump:
[178168.961258] rcu_sched       R  running task        0    10      2 0x00000000
[178168.961290] [<c0997424>] (__schedule) from [<c0997a94>] (schedule+0x50/0xa8)
[178168.961306] [<c0997a94>] (schedule) from [<c099ba4c>] (schedule_timeout+0x1d0/0x428)
[178168.961323] [<c099ba4c>] (schedule_timeout) from [<c02902ec>] (rcu_gp_kthread+0x4ac/0xa30)
[178168.961336] [<c02902ec>] (rcu_gp_kthread) from [<c0244170>] (kthread+0x138/0x168)
[178168.961349] [<c0244170>] (kthread) from [<c02010ac>] (ret_from_fork+0x14/0x28)
[178168.961357] Exception stack(0xef921fb0 to 0xef921ff8)
[178168.961367] 1fa0:                                     00000000 00000000 00000000 00000000
[178168.961377] 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[178168.961387] 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[178208.675491] systemd[1]: systemd-logind.service: Watchdog timeout (limit 3min)!
[178208.675662] systemd[1]: systemd-logind.service: Killing process 353 (systemd-logind) with signal SIGABRT.
[178208.694535] systemd[1]: systemd-journald.service: Main process exited, code=killed, status=6/ABRT
[178208.694732] systemd[1]: systemd-journald.service: Failed with result 'watchdog'.
[178208.699620] systemd[1]: systemd-logind.service: Main process exited, code=killed, status=6/ABRT
[178208.699815] systemd[1]: systemd-logind.service: Failed with result 'watchdog'.
[178208.709089] systemd[1]: systemd-journald.service: Service has no hold-off time (RestartSec=0), scheduling restart.
[178208.709258] systemd[1]: systemd-journald.service: Scheduled restart job, restart counter is at 1.
[178208.711558] systemd[1]: systemd-logind.service: Service has no hold-off time (RestartSec=0), scheduling restart.
[178208.712351] systemd[1]: systemd-logind.service: Scheduled restart job, restart counter is at 1.
[178208.826647] systemd-journald[24052]: File /run/log/journal/438df95ac2194439839049ad37c16acd/system.journal corrupted or uncleanly shut down, renaming and replacing.


I'm using USB3 SATA3 adapter to connect SSD disk which is mounted as / and I suspect that it may be somehow related to the problem but I cannot understand what it is. I have been struggling with it for a few months and I can not narrow the problem down. I have already done the following steps:
- replaced power supplier for a new one (3A)
- replaced USB3 SATA3 adapter
- upgraded the system
- replaced the Pi for a new board (borrowed from my friend)

Does anyone have any clue that can help me?

abmantis
Posts: 1
Joined: Tue Mar 10, 2020 6:44 pm

Re: Pi 4 freezes occasionally - kernel problems?

Tue Mar 10, 2020 6:45 pm

I'm also having this exact same problem. I'm also using a USB3 SSD case.

jarekt70
Posts: 2
Joined: Wed Dec 11, 2019 6:26 pm

Re: Pi 4 freezes occasionally - kernel problems?

Tue Mar 10, 2020 8:22 pm

What ssd disk are you using? I have replaced the SD card but with no effect - I still have the issue.

User avatar
IGHOR
Posts: 12
Joined: Tue Apr 17, 2018 11:34 pm
Location: Ukraine
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Re: Pi 4 freezes occasionally - kernel problems?

Mon May 18, 2020 8:14 pm

Got the same issue on Raspberry Pi 3B+ with Ubuntu Core 20.04
Booted from USB flash drive

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