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DateThu, 8 Oct 2009 21:01:28 +0200
FromIngo Molnar <>
Subject[GIT PULL] scheduler fix
Linus,

Please pull the latest sched-fixes-for-linus git tree from:

git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git sched-fixes-for-linus

Thanks,

Ingo

------------------>
Peter Williams (1):
sched: Set correct normal_prio and prio values in sched_fork()

kernel/sched.c | 20 +++++++++-----------
1 files changed, 9 insertions(+), 11 deletions(-)
diff --git a/kernel/sched.c b/kernel/sched.c
index 1535f38..76c0e96 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -2515,22 +2515,17 @@ void sched_fork(struct task_struct *p, int clone_flags)
__sched_fork(p);

/*
- * Make sure we do not leak PI boosting priority to the child.
- */
- p->prio = current->normal_prio;
-
- /*
* Revert to default priority/policy on fork if requested.
*/
if (unlikely(p->sched_reset_on_fork)) {
- if (p->policy == SCHED_FIFO || p->policy == SCHED_RR)
+ if (p->policy == SCHED_FIFO || p->policy == SCHED_RR) {
p->policy = SCHED_NORMAL;
-
- if (p->normal_prio < DEFAULT_PRIO)
- p->prio = DEFAULT_PRIO;
+ p->normal_prio = p->static_prio;
+ }

if (PRIO_TO_NICE(p->static_prio) < 0) {
p->static_prio = NICE_TO_PRIO(0);
+ p->normal_prio = p->static_prio;
set_load_weight(p);
}

@@ -2541,6 +2536,11 @@ void sched_fork(struct task_struct *p, int clone_flags)
p->sched_reset_on_fork = 0;
}

+ /*
+ * Make sure we do not leak PI boosting priority to the child.
+ */
+ p->prio = current->normal_prio;
+
if (!rt_prio(p->prio))
p->sched_class = &fair_sched_class;

@@ -2581,8 +2581,6 @@ void wake_up_new_task(struct task_struct *p, unsigned long clone_flags)
BUG_ON(p->state != TASK_RUNNING);
update_rq_clock(rq);

- p->prio = effective_prio(p);
-
if (!p->sched_class->task_new || !current->se.on_rq) {
activate_task(rq, p, 0);
} else {

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