[POWERPC] Fix handling of unrecoverable SLB miss interrupts

[linux-2.6] / kernel / sched_rt.c

diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c
index 35825b28e4295b9648180d3169745975513d3c0e..0a6d2e516420516cb1d0c35a5345db1f356f71ab 100644 (file)
--- a/kernel/sched_rt.c
+++ b/kernel/sched_rt.c
@@ -55,7 +55,7 @@ static inline int on_rt_rq(struct sched_rt_entity *rt_se)
        return !list_empty(&rt_se->run_list);
 }
 
-#ifdef CONFIG_FAIR_GROUP_SCHED
+#ifdef CONFIG_RT_GROUP_SCHED
 
 static inline u64 sched_rt_runtime(struct rt_rq *rt_rq)
 {
@@ -177,7 +177,7 @@ static inline int rt_rq_throttled(struct rt_rq *rt_rq)
 
 static inline int rt_se_prio(struct sched_rt_entity *rt_se)
 {
-#ifdef CONFIG_FAIR_GROUP_SCHED
+#ifdef CONFIG_RT_GROUP_SCHED
        struct rt_rq *rt_rq = group_rt_rq(rt_se);
 
        if (rt_rq)
@@ -269,7 +269,7 @@ void inc_rt_tasks(struct sched_rt_entity *rt_se, struct rt_rq *rt_rq)
 {
        WARN_ON(!rt_prio(rt_se_prio(rt_se)));
        rt_rq->rt_nr_running++;
-#if defined CONFIG_SMP || defined CONFIG_FAIR_GROUP_SCHED
+#if defined CONFIG_SMP || defined CONFIG_RT_GROUP_SCHED
        if (rt_se_prio(rt_se) < rt_rq->highest_prio)
                rt_rq->highest_prio = rt_se_prio(rt_se);
 #endif
@@ -281,7 +281,7 @@ void inc_rt_tasks(struct sched_rt_entity *rt_se, struct rt_rq *rt_rq)
 
        update_rt_migration(rq_of_rt_rq(rt_rq));
 #endif
-#ifdef CONFIG_FAIR_GROUP_SCHED
+#ifdef CONFIG_RT_GROUP_SCHED
        if (rt_se_boosted(rt_se))
                rt_rq->rt_nr_boosted++;
 #endif
@@ -293,7 +293,7 @@ void dec_rt_tasks(struct sched_rt_entity *rt_se, struct rt_rq *rt_rq)
        WARN_ON(!rt_prio(rt_se_prio(rt_se)));
        WARN_ON(!rt_rq->rt_nr_running);
        rt_rq->rt_nr_running--;
-#if defined CONFIG_SMP || defined CONFIG_FAIR_GROUP_SCHED
+#if defined CONFIG_SMP || defined CONFIG_RT_GROUP_SCHED
        if (rt_rq->rt_nr_running) {
                struct rt_prio_array *array;
 
@@ -315,7 +315,7 @@ void dec_rt_tasks(struct sched_rt_entity *rt_se, struct rt_rq *rt_rq)
 
        update_rt_migration(rq_of_rt_rq(rt_rq));
 #endif /* CONFIG_SMP */
-#ifdef CONFIG_FAIR_GROUP_SCHED
+#ifdef CONFIG_RT_GROUP_SCHED
        if (rt_se_boosted(rt_se))
                rt_rq->rt_nr_boosted--;
 
@@ -393,8 +393,6 @@ static void enqueue_task_rt(struct rq *rq, struct task_struct *p, int wakeup)
         */
        for_each_sched_rt_entity(rt_se)
                enqueue_rt_entity(rt_se);
-
-       inc_cpu_load(rq, p->se.load.weight);
 }
 
 static void dequeue_task_rt(struct rq *rq, struct task_struct *p, int sleep)
@@ -414,8 +412,6 @@ static void dequeue_task_rt(struct rq *rq, struct task_struct *p, int sleep)
                if (rt_rq && rt_rq->rt_nr_running)
                        enqueue_rt_entity(rt_se);
        }
-
-       dec_cpu_load(rq, p->se.load.weight);
 }
 
 /*
@@ -1111,9 +1107,11 @@ static void prio_changed_rt(struct rq *rq, struct task_struct *p,
                        pull_rt_task(rq);
                /*
                 * If there's a higher priority task waiting to run
-                * then reschedule.
+                * then reschedule. Note, the above pull_rt_task
+                * can release the rq lock and p could migrate.
+                * Only reschedule if p is still on the same runqueue.
                 */
-               if (p->prio > rq->rt.highest_prio)
+               if (p->prio > rq->rt.highest_prio && rq->curr == p)
                        resched_task(p);
 #else
                /* For UP simply resched on drop of prio */