bad: scheduling from the idle thread! A64

[@lex]

Hi,

Yesterday i was doing some experiments with Kernel 5.3.0-rc4 on my NanoPi A64 and it was all looking good until i hit this error below.

I just let Kodi running in idle mode, turned off the monitor and the next day no HDMI output but the board was still running, i could ssh to it as usual.

I have no idea what to look for to find the reason or fix this problem.

Can this be a missing kernel configuration or a bug?

Can someone give some hints to fix the problem?

Here is the kernel message:

[67634.474921] bad: scheduling from the idle thread!
[67634.479649] CPU: 3 PID: 0 Comm: swapper/3 Tainted: G        WC O      5.3.0-rc4 #1
[67634.479655] Hardware name: FriendlyARM NanoPi A64 (DT)
[67634.479660] Call trace:
[67634.479673]  dump_backtrace+0x0/0x150
[67634.479685]  show_stack+0x14/0x20
[67634.479694]  dump_stack+0xa8/0xcc
[67634.479705]  dequeue_task_idle+0x24/0x38
[67634.479717]  deactivate_task+0x70/0xc8
[67634.479728]  __schedule+0x290/0x470
[67634.479739]  schedule_idle+0x1c/0x38
[67634.479749]  do_idle+0x194/0x2c0
[67634.479759]  cpu_startup_entry+0x20/0x28
[67634.479770]  secondary_start_kernel+0x1a0/0x1e0
[67634.481898] bad: scheduling from the idle thread!
[67634.487456] CPU: 3 PID: 0 Comm: swapper/3 Tainted: G        WC O      5.3.0-rc4 #1
[67634.487706] Hardware name: FriendlyARM NanoPi A64 (DT)
[67634.487797] Call trace:
[67634.488069]  dump_backtrace+0x0/0x150
[67634.488316]  show_stack+0x14/0x20
[67634.488502]  dump_stack+0xa8/0xcc
[67634.488704]  dequeue_task_idle+0x24/0x38
[67634.488944]  deactivate_task+0x70/0xc8
[67634.489174]  __schedule+0x290/0x470
[67634.489400]  schedule_idle+0x1c/0x38
[67634.489592]  do_idle+0x194/0x2c0
[67634.489788]  cpu_startup_entry+0x20/0x28
[67634.490014]  secondary_start_kernel+0x1a0/0x1e0
[67634.491423] bad: scheduling from the idle thread!
[67634.496843] CPU: 3 PID: 0 Comm: swapper/3 Tainted: G        WC O      5.3.0-rc4 #1
[67634.496960] Hardware name: FriendlyARM NanoPi A64 (DT)
[67634.497180] Call trace:
[67634.497446]  dump_backtrace+0x0/0x150
[67634.497683]  show_stack+0x14/0x20
[67634.497868]  dump_stack+0xa8/0xcc
[67634.498069]  dequeue_task_idle+0x24/0x38
[67634.498304]  deactivate_task+0x70/0xc8
[67634.498533]  __schedule+0x290/0x470
[67634.498757]  schedule_idle+0x1c/0x38
[67634.498953]  do_idle+0x194/0x2c0
[67634.499146]  cpu_startup_entry+0x20/0x28
[67634.499371]  secondary_start_kernel+0x1a0/0x1e0
[67634.614312] bad: scheduling from the idle thread!

Regards,

@lex