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Commit dad1c65c authored by Con Kolivas's avatar Con Kolivas Committed by Linus Torvalds
Browse files

[PATCH] sched: account rt tasks in prio_bias() 



Real time tasks' effect on prio_bias should be based on their real time
priority level instead of their static_prio which is based on nice.

Signed-off-by: default avatarCon Kolivas <kernel@kolivas.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 738a2ccb

kernel/sched.c

+14 −8
Original line number Diff line number Diff line
@@ -661,21 +661,21 @@ static int effective_prio(task_t *p) 
}



#ifdef CONFIG_SMP

static inline void inc_prio_bias(runqueue_t *rq, int static_prio)

static inline void inc_prio_bias(runqueue_t *rq, int prio)

{

	rq->prio_bias += MAX_PRIO - static_prio;

	rq->prio_bias += MAX_PRIO - prio;

}



static inline void dec_prio_bias(runqueue_t *rq, int static_prio)

static inline void dec_prio_bias(runqueue_t *rq, int prio)

{

	rq->prio_bias -= MAX_PRIO - static_prio;

	rq->prio_bias -= MAX_PRIO - prio;

}

#else

static inline void inc_prio_bias(runqueue_t *rq, int static_prio)

static inline void inc_prio_bias(runqueue_t *rq, int prio)

{

}



static inline void dec_prio_bias(runqueue_t *rq, int static_prio)

static inline void dec_prio_bias(runqueue_t *rq, int prio)

{

}

#endif
@@ -683,12 +683,18 @@ static inline void dec_prio_bias(runqueue_t *rq, int static_prio) 
static inline void inc_nr_running(task_t *p, runqueue_t *rq)

{

	rq->nr_running++;

	if (rt_task(p))

		inc_prio_bias(rq, p->prio);

	else

		inc_prio_bias(rq, p->static_prio);

}



static inline void dec_nr_running(task_t *p, runqueue_t *rq)

{

	rq->nr_running--;

	if (rt_task(p))

		dec_prio_bias(rq, p->prio);

	else

		dec_prio_bias(rq, p->static_prio);

}