[mythtv-users] mythbackend problem with kernel 6.3.7

[John Pilkington]

On 15/06/2023 12:57, Stephan Seitz wrote:
> Am Do, Jun 15, 2023 at 10:43:43 +0100 schrieb John Pilkington:
>> Today's elrepo has kernel-ml 6.3.8.  Same problem.
> 
> Yes, I have the same problem with my self-made 6.3.7 and 6.3.8 on 
> Debian/Testing.
> 
> The backend hangs in D state and is unkillable.
> 
> I’m using DVB-S/T with a card from Digital Devices.
> 
>      Stephan

Yes, I get a lot of Trace stuff like this
{{{

[root at HP_Box john]# journalctl -S -8h  | grep -v dracut | grep -A 10 
"task mythbackend:"
Jun 15 09:34:44 HP_Box kernel: INFO: task mythbackend:2889 blocked for 
more than 122 seconds.
Jun 15 09:34:44 HP_Box kernel:       Tainted: G            E 
6.3.8-1.el7.elrepo.x86_64 #1
Jun 15 09:34:44 HP_Box kernel: "echo 0 > 
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Jun 15 09:34:44 HP_Box kernel: task:mythbackend     state:D stack:0 
pid:2889  ppid:1      flags:0x00004004
Jun 15 09:34:44 HP_Box kernel: Call Trace:
Jun 15 09:34:44 HP_Box kernel:  <TASK>
Jun 15 09:34:44 HP_Box kernel:  __schedule+0x357/0x9f0
Jun 15 09:34:44 HP_Box kernel:  schedule+0x68/0xf0
Jun 15 09:34:44 HP_Box kernel:  schedule_preempt_disabled+0x15/0x30
Jun 15 09:34:44 HP_Box kernel:  __mutex_lock.isra.0+0x30a/0x6b0
Jun 15 09:34:44 HP_Box kernel:  ? __smp_call_single_queue+0x3c/0x50
--
Jun 15 09:36:46 HP_Box kernel: INFO: task mythbackend:2889 blocked for 
more than 245 seconds.
Jun 15 09:36:46 HP_Box kernel:       Tainted: G            E 
6.3.8-1.el7.elrepo.x86_64 #1
Jun 15 09:36:46 HP_Box kernel: "echo 0 > 
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Jun 15 09:36:46 HP_Box kernel: task:mythbackend     state:D stack:0 
pid:2889  ppid:1      flags:0x00004004
Jun 15 09:36:46 HP_Box kernel: Call Trace:
Jun 15 09:36:46 HP_Box kernel:  <TASK>
Jun 15 09:36:46 HP_Box kernel:  __schedule+0x357/0x9f0
Jun 15 09:36:46 HP_Box kernel:  schedule+0x68/0xf0
Jun 15 09:36:46 HP_Box kernel:  schedule_preempt_disabled+0x15/0x30
Jun 15 09:36:46 HP_Box kernel:  __mutex_lock.isra.0+0x30a/0x6b0
Jun 15 09:36:46 HP_Box kernel:  ? __smp_call_single_queue+0x3c/0x50
}}}