New comment by st3r4g on void-packages repository

https://github.com/void-linux/void-packages/issues/28728#issuecomment-786762033

Comment:
> Enable `CONFIG_RT_GROUP_SCHED` make rtkit don't work either: https://bugs.gentoo.org/569546

Void has it enabled:
```
[void-packages 0]$ grep CONFIG_RT_GROUP_SCHED srcpkgs/linux5.10/files/x86_64-dotconfig 
CONFIG_RT_GROUP_SCHED=y
```
and for me rtkit works (on glibc):
```
[void-packages 0]$ /usr/libexec/installed-tests/rtkit/rtkit-test 
Max realtime priority is: 20
Min nice level is: -15
Rttime limit is: 200000 ns
before:
        SCHED_RESET_ON_FORK: no
        SCHED_OTHER with nice level: 0
Successfully became high priority.
after high priority:
        SCHED_RESET_ON_FORK: yes
        SCHED_OTHER with nice level: -10
Successfully became realtime.
after realtime:
        SCHED_RESET_ON_FORK: yes
        SCHED_RR with priority 10
```
so I don't know...