sched: another wakeup_granularity fix

unit mis-match: wakeup_gran was used against a vruntime
Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

kernel/sched_fair.c

@@ -818,7 +818,7 @@ static void check_preempt_wakeup(struct rq *rq, struct task_struct *p)
 	struct task_struct *curr = rq->curr;
 	struct cfs_rq *cfs_rq = task_cfs_rq(curr);
 	struct sched_entity *se = &curr->se, *pse = &p->se;
-	s64 delta;
+	s64 delta, gran;
 
 	if (unlikely(rt_prio(p->prio))) {
 		update_rq_clock(rq);
@@ -833,8 +833,11 @@ static void check_preempt_wakeup(struct rq *rq, struct task_struct *p)
 	}
 
 	delta = se->vruntime - pse->vruntime;
+	gran = sysctl_sched_wakeup_granularity;
+	if (unlikely(se->load.weight != NICE_0_LOAD))
+		gran = calc_delta_fair(gran, &se->load);
 
-	if (delta > (s64)sysctl_sched_wakeup_granularity)
+	if (delta > gran)
 		resched_task(curr);
 }