[Query]: sched/fair: prio_changed_fair()

[Viresh Kumar]

Hi Ingo/Peter,

I am trying to understand the complex scheduler code and just found
something incorrect (maybe i am not reading it well):

File: kernel/sched/fair.c

static void
prio_changed_fair(struct rq *rq, struct task_struct *p, int oldprio)
{
	if (!p->se.on_rq)
		return;

	/*
	 * Reschedule if we are currently running on this runqueue and
	 * our priority decreased, or if we are not currently running on
	 * this runqueue and our priority is higher than the current's
	 */
	if (rq->curr == p) {
		if (p->prio > oldprio)
			resched_task(rq->curr);
	} else
		check_preempt_curr(rq, p, 0);
}


Comment says that we must mark the task to be rescheduled, if we
are currently running and our priority has decreased. But in code we
are checking (p->prio > oldprio). i.e. reschedule if we were currently
running and our priority increased.

Sorry if i am wrong :(

--
viresh
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