nfsd41: replace page based DRC with buffer based DRC

[safe/jmp/linux-2.6] / kernel / sched_rt.c

diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c
index 299d012..3918e01 100644 (file)
--- a/kernel/sched_rt.c
+++ b/kernel/sched_rt.c
@@ -10,6 +10,8 @@ static inline struct task_struct *rt_task_of(struct sched_rt_entity *rt_se)
 
 #ifdef CONFIG_RT_GROUP_SCHED
 
+#define rt_entity_is_task(rt_se) (!(rt_se)->my_q)
+
 static inline struct rq *rq_of_rt_rq(struct rt_rq *rt_rq)
 {
        return rt_rq->rq;
@@ -22,6 +24,8 @@ static inline struct rt_rq *rt_rq_of_se(struct sched_rt_entity *rt_se)
 
 #else /* CONFIG_RT_GROUP_SCHED */
 
+#define rt_entity_is_task(rt_se) (1)
+
 static inline struct rq *rq_of_rt_rq(struct rt_rq *rt_rq)
 {
        return container_of(rt_rq, struct rq, rt);
@@ -73,7 +77,7 @@ static inline void rt_clear_overload(struct rq *rq)
 
 static void update_rt_migration(struct rt_rq *rt_rq)
 {
-       if (rt_rq->rt_nr_migratory && (rt_rq->rt_nr_running > 1)) {
+       if (rt_rq->rt_nr_migratory && rt_rq->rt_nr_total > 1) {
                if (!rt_rq->overloaded) {
                        rt_set_overload(rq_of_rt_rq(rt_rq));
                        rt_rq->overloaded = 1;
@@ -86,6 +90,12 @@ static void update_rt_migration(struct rt_rq *rt_rq)
 
 static void inc_rt_migration(struct sched_rt_entity *rt_se, struct rt_rq *rt_rq)
 {
+       if (!rt_entity_is_task(rt_se))
+               return;
+
+       rt_rq = &rq_of_rt_rq(rt_rq)->rt;
+
+       rt_rq->rt_nr_total++;
        if (rt_se->nr_cpus_allowed > 1)
                rt_rq->rt_nr_migratory++;
 
@@ -94,6 +104,12 @@ static void inc_rt_migration(struct sched_rt_entity *rt_se, struct rt_rq *rt_rq)
 
 static void dec_rt_migration(struct sched_rt_entity *rt_se, struct rt_rq *rt_rq)
 {
+       if (!rt_entity_is_task(rt_se))
+               return;
+
+       rt_rq = &rq_of_rt_rq(rt_rq)->rt;
+
+       rt_rq->rt_nr_total--;
        if (rt_se->nr_cpus_allowed > 1)
                rt_rq->rt_nr_migratory--;
 
@@ -948,20 +964,15 @@ static int select_task_rq_rt(struct task_struct *p, int sync)
 
 static void check_preempt_equal_prio(struct rq *rq, struct task_struct *p)
 {
-       cpumask_var_t mask;
-
        if (rq->curr->rt.nr_cpus_allowed == 1)
                return;
 
-       if (!alloc_cpumask_var(&mask, GFP_ATOMIC))
-               return;
-
        if (p->rt.nr_cpus_allowed != 1
-           && cpupri_find(&rq->rd->cpupri, p, mask))
-               goto free;
+           && cpupri_find(&rq->rd->cpupri, p, NULL))
+               return;
 
-       if (!cpupri_find(&rq->rd->cpupri, rq->curr, mask))
-               goto free;
+       if (!cpupri_find(&rq->rd->cpupri, rq->curr, NULL))
+               return;
 
        /*
         * There appears to be other cpus that can accept
@@ -970,8 +981,6 @@ static void check_preempt_equal_prio(struct rq *rq, struct task_struct *p)
         */
        requeue_task_rt(rq, p, 1);
        resched_task(rq->curr);
-free:
-       free_cpumask_var(mask);
 }
 
 #endif /* CONFIG_SMP */
@@ -1598,7 +1607,7 @@ static inline void init_sched_rt_class(void)
        unsigned int i;
 
        for_each_possible_cpu(i)
-               alloc_cpumask_var_node(&per_cpu(local_cpu_mask, i),
+               zalloc_cpumask_var_node(&per_cpu(local_cpu_mask, i),
                                        GFP_KERNEL, cpu_to_node(i));
 }
 #endif /* CONFIG_SMP */