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[PATCH] sched: change prio bias only if queued

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prio_bias should only be adjusted in set_user_nice if p is actually currently
queued.

Signed-off-by: Con Kolivas <kernel@kolivas.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Con Kolivas 2005-11-08 21:38:56 -08:00 committed by Linus Torvalds
parent b910472dd3
commit 738a2ccbcf
1 changed files with 4 additions and 5 deletions
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9
kernel/sched.c
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@ -3508,25 +3508,24 @@ void set_user_nice(task_t *p, long nice)
* not SCHED_NORMAL: * not SCHED_NORMAL:
*/ */
if (rt_task(p)) { if (rt_task(p)) {
dec_prio_bias(rq, p->static_prio);
p->static_prio = NICE_TO_PRIO(nice); p->static_prio = NICE_TO_PRIO(nice);
inc_prio_bias(rq, p->static_prio);
goto out_unlock; goto out_unlock;
} }
array = p->array; array = p->array;
if (array) if (array) {
dequeue_task(p, array); dequeue_task(p, array);
dec_prio_bias(rq, p->static_prio);
}
old_prio = p->prio; old_prio = p->prio;
new_prio = NICE_TO_PRIO(nice); new_prio = NICE_TO_PRIO(nice);
delta = new_prio - old_prio; delta = new_prio - old_prio;
dec_prio_bias(rq, p->static_prio);
p->static_prio = NICE_TO_PRIO(nice); p->static_prio = NICE_TO_PRIO(nice);
inc_prio_bias(rq, p->static_prio);
p->prio += delta; p->prio += delta;
if (array) { if (array) {
enqueue_task(p, array); enqueue_task(p, array);
inc_prio_bias(rq, p->static_prio);
/* /*
* If the task increased its priority or is running and * If the task increased its priority or is running and
* lowered its priority, then reschedule its CPU: * lowered its priority, then reschedule its CPU: