ACPI: disable stray GPE, prevent ACPI interrupt storm

[linux-2.6] / kernel / sched_fair.c

diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index d558716a9add732835397d49f7c29c47812535a5..ee00da284b1230233f0fb0c0d2028cb2579c441f 100644 (file)
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -43,7 +43,7 @@ unsigned int sysctl_sched_min_granularity = 1000000ULL;
 /*
  * is kept at sysctl_sched_latency / sysctl_sched_min_granularity
  */
-unsigned int sched_nr_latency = 20;
+static unsigned int sched_nr_latency = 20;
 
 /*
  * After fork, child runs first. (default) If set to 0 then
@@ -837,7 +837,7 @@ 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, gran;
+       unsigned long gran;
 
        if (unlikely(rt_prio(p->prio))) {
                update_rq_clock(rq);
@@ -860,12 +860,11 @@ static void check_preempt_wakeup(struct rq *rq, struct task_struct *p)
                pse = parent_entity(pse);
        }
 
-       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 > gran)
+       if (pse->vruntime + gran < se->vruntime)
                resched_task(curr);
 }
 
@@ -1068,8 +1067,9 @@ static void task_new_fair(struct rq *rq, struct task_struct *p)
        update_curr(cfs_rq);
        place_entity(cfs_rq, se, 1);
 
+       /* 'curr' will be NULL if the child belongs to a different group */
        if (sysctl_sched_child_runs_first && this_cpu == task_cpu(p) &&
-                       curr->vruntime < se->vruntime) {
+                       curr && curr->vruntime < se->vruntime) {
                /*
                 * Upon rescheduling, sched_class::put_prev_task() will place
                 * 'current' within the tree based on its new key value.