>> If each user has his/her own node, they can set priorities of their
>> own processes as they wish: If they set one of their processes to
>> realtime priority, it has that priority only over other processes of
>> that user, not over processes of other users.
>
> The flip side of this is that if a user renices a process, it will only
> make it have a lower priority than the user's other processes, not with
> respect to all of the processes in the system, which is what is usually
> desired when someone is renicing a process.
That is a feature, not a bug. Users can get their full
share of the CPU while not slowing down interactive tasks.