Re: [PATCH] realtime-preempt: update inherited priorities on setscheduler

[Ingo Molnar <mingo@elte.hu>]

* Scott Wood <scott@gw.timesys.com> wrote:

> -	p->prio = effective_prio(p);
> +	/* Don't overwrite an inherited RT priority with the static
> +	   RT priority. */
> +
> +	if (!rt_task(p))
> +		p->prio = effective_prio(p);

are you sure this is needed? The -RT code currently does this:

 static int effective_prio(task_t *p)
 {
         if (rt_task(p))
                 return p->prio;
         return __effective_prio(p);
 }

i.e. if it's an RT task then 'effective priority' is whatever it has
right now. I.e. 'p->prio = effective_prio(p)' will have no effect for RT
tasks. PI would not be working at all if we were overwriting the
inherited priority.

	Ingo