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-rw-r--r--kernel/sched.c210
1 files changed, 139 insertions, 71 deletions
diff --git a/kernel/sched.c b/kernel/sched.c
index 5edc549..d2f4398 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -7559,57 +7559,29 @@ static int load_balance_monitor(void *unused)
}
#endif /* CONFIG_SMP */
-static void free_sched_group(struct task_group *tg)
+#ifdef CONFIG_FAIR_GROUP_SCHED
+static void free_fair_sched_group(struct task_group *tg)
{
int i;
for_each_possible_cpu(i) {
-#ifdef CONFIG_FAIR_GROUP_SCHED
if (tg->cfs_rq)
kfree(tg->cfs_rq[i]);
if (tg->se)
kfree(tg->se[i]);
-#endif
-#ifdef CONFIG_RT_GROUP_SCHED
- if (tg->rt_rq)
- kfree(tg->rt_rq[i]);
- if (tg->rt_se)
- kfree(tg->rt_se[i]);
-#endif
}
-#ifdef CONFIG_FAIR_GROUP_SCHED
kfree(tg->cfs_rq);
kfree(tg->se);
-#endif
-#ifdef CONFIG_RT_GROUP_SCHED
- kfree(tg->rt_rq);
- kfree(tg->rt_se);
-#endif
- kfree(tg);
}
-/* allocate runqueue etc for a new task group */
-struct task_group *sched_create_group(void)
+static int alloc_fair_sched_group(struct task_group *tg)
{
- struct task_group *tg;
-#ifdef CONFIG_FAIR_GROUP_SCHED
struct cfs_rq *cfs_rq;
struct sched_entity *se;
-#endif
-#ifdef CONFIG_RT_GROUP_SCHED
- struct rt_rq *rt_rq;
- struct sched_rt_entity *rt_se;
-#endif
struct rq *rq;
- unsigned long flags;
int i;
- tg = kzalloc(sizeof(*tg), GFP_KERNEL);
- if (!tg)
- return ERR_PTR(-ENOMEM);
-
-#ifdef CONFIG_FAIR_GROUP_SCHED
tg->cfs_rq = kzalloc(sizeof(cfs_rq) * NR_CPUS, GFP_KERNEL);
if (!tg->cfs_rq)
goto err;
@@ -7618,23 +7590,10 @@ struct task_group *sched_create_group(void)
goto err;
tg->shares = NICE_0_LOAD;
-#endif
-
-#ifdef CONFIG_RT_GROUP_SCHED
- tg->rt_rq = kzalloc(sizeof(rt_rq) * NR_CPUS, GFP_KERNEL);
- if (!tg->rt_rq)
- goto err;
- tg->rt_se = kzalloc(sizeof(rt_se) * NR_CPUS, GFP_KERNEL);
- if (!tg->rt_se)
- goto err;
-
- tg->rt_runtime = 0;
-#endif
for_each_possible_cpu(i) {
rq = cpu_rq(i);
-#ifdef CONFIG_FAIR_GROUP_SCHED
cfs_rq = kmalloc_node(sizeof(struct cfs_rq),
GFP_KERNEL|__GFP_ZERO, cpu_to_node(i));
if (!cfs_rq)
@@ -7646,9 +7605,78 @@ struct task_group *sched_create_group(void)
goto err;
init_tg_cfs_entry(rq, tg, cfs_rq, se, i, 0);
+ }
+
+ return 1;
+
+ err:
+ return 0;
+}
+
+static inline void register_fair_sched_group(struct task_group *tg, int cpu)
+{
+ list_add_rcu(&tg->cfs_rq[cpu]->leaf_cfs_rq_list,
+ &cpu_rq(cpu)->leaf_cfs_rq_list);
+}
+
+static inline void unregister_fair_sched_group(struct task_group *tg, int cpu)
+{
+ list_del_rcu(&tg->cfs_rq[cpu]->leaf_cfs_rq_list);
+}
+#else
+static inline void free_fair_sched_group(struct task_group *tg)
+{
+}
+
+static inline int alloc_fair_sched_group(struct task_group *tg)
+{
+ return 1;
+}
+
+static inline void register_fair_sched_group(struct task_group *tg, int cpu)
+{
+}
+
+static inline void unregister_fair_sched_group(struct task_group *tg, int cpu)
+{
+}
#endif
#ifdef CONFIG_RT_GROUP_SCHED
+static void free_rt_sched_group(struct task_group *tg)
+{
+ int i;
+
+ for_each_possible_cpu(i) {
+ if (tg->rt_rq)
+ kfree(tg->rt_rq[i]);
+ if (tg->rt_se)
+ kfree(tg->rt_se[i]);
+ }
+
+ kfree(tg->rt_rq);
+ kfree(tg->rt_se);
+}
+
+static int alloc_rt_sched_group(struct task_group *tg)
+{
+ struct rt_rq *rt_rq;
+ struct sched_rt_entity *rt_se;
+ struct rq *rq;
+ int i;
+
+ tg->rt_rq = kzalloc(sizeof(rt_rq) * NR_CPUS, GFP_KERNEL);
+ if (!tg->rt_rq)
+ goto err;
+ tg->rt_se = kzalloc(sizeof(rt_se) * NR_CPUS, GFP_KERNEL);
+ if (!tg->rt_se)
+ goto err;
+
+ tg->rt_runtime = 0;
+
+ for_each_possible_cpu(i) {
+ rq = cpu_rq(i);
+
rt_rq = kmalloc_node(sizeof(struct rt_rq),
GFP_KERNEL|__GFP_ZERO, cpu_to_node(i));
if (!rt_rq)
@@ -7660,20 +7688,71 @@ struct task_group *sched_create_group(void)
goto err;
init_tg_rt_entry(rq, tg, rt_rq, rt_se, i, 0);
-#endif
}
+ return 1;
+
+ err:
+ return 0;
+}
+
+static inline void register_rt_sched_group(struct task_group *tg, int cpu)
+{
+ list_add_rcu(&tg->rt_rq[cpu]->leaf_rt_rq_list,
+ &cpu_rq(cpu)->leaf_rt_rq_list);
+}
+
+static inline void unregister_rt_sched_group(struct task_group *tg, int cpu)
+{
+ list_del_rcu(&tg->rt_rq[cpu]->leaf_rt_rq_list);
+}
+#else
+static inline void free_rt_sched_group(struct task_group *tg)
+{
+}
+
+static inline int alloc_rt_sched_group(struct task_group *tg)
+{
+ return 1;
+}
+
+static inline void register_rt_sched_group(struct task_group *tg, int cpu)
+{
+}
+
+static inline void unregister_rt_sched_group(struct task_group *tg, int cpu)
+{
+}
+#endif
+
+static void free_sched_group(struct task_group *tg)
+{
+ free_fair_sched_group(tg);
+ free_rt_sched_group(tg);
+ kfree(tg);
+}
+
+/* allocate runqueue etc for a new task group */
+struct task_group *sched_create_group(void)
+{
+ struct task_group *tg;
+ unsigned long flags;
+ int i;
+
+ tg = kzalloc(sizeof(*tg), GFP_KERNEL);
+ if (!tg)
+ return ERR_PTR(-ENOMEM);
+
+ if (!alloc_fair_sched_group(tg))
+ goto err;
+
+ if (!alloc_rt_sched_group(tg))
+ goto err;
+
spin_lock_irqsave(&task_group_lock, flags);
for_each_possible_cpu(i) {
- rq = cpu_rq(i);
-#ifdef CONFIG_FAIR_GROUP_SCHED
- cfs_rq = tg->cfs_rq[i];
- list_add_rcu(&cfs_rq->leaf_cfs_rq_list, &rq->leaf_cfs_rq_list);
-#endif
-#ifdef CONFIG_RT_GROUP_SCHED
- rt_rq = tg->rt_rq[i];
- list_add_rcu(&rt_rq->leaf_rt_rq_list, &rq->leaf_rt_rq_list);
-#endif
+ register_fair_sched_group(tg, i);
+ register_rt_sched_group(tg, i);
}
list_add_rcu(&tg->list, &task_groups);
spin_unlock_irqrestore(&task_group_lock, flags);
@@ -7700,12 +7779,8 @@ void sched_destroy_group(struct task_group *tg)
spin_lock_irqsave(&task_group_lock, flags);
for_each_possible_cpu(i) {
-#ifdef CONFIG_FAIR_GROUP_SCHED
- list_del_rcu(&tg->cfs_rq[i]->leaf_cfs_rq_list);
-#endif
-#ifdef CONFIG_RT_GROUP_SCHED
- list_del_rcu(&tg->rt_rq[i]->leaf_rt_rq_list);
-#endif
+ unregister_fair_sched_group(tg, i);
+ unregister_rt_sched_group(tg, i);
}
list_del_rcu(&tg->list);
spin_unlock_irqrestore(&task_group_lock, flags);
@@ -7780,8 +7855,6 @@ static DEFINE_MUTEX(shares_mutex);
int sched_group_set_shares(struct task_group *tg, unsigned long shares)
{
int i;
- struct cfs_rq *cfs_rq;
- struct rq *rq;
unsigned long flags;
mutex_lock(&shares_mutex);
@@ -7797,10 +7870,8 @@ int sched_group_set_shares(struct task_group *tg, unsigned long shares)
* by taking it off the rq->leaf_cfs_rq_list on each cpu.
*/
spin_lock_irqsave(&task_group_lock, flags);
- for_each_possible_cpu(i) {
- cfs_rq = tg->cfs_rq[i];
- list_del_rcu(&cfs_rq->leaf_cfs_rq_list);
- }
+ for_each_possible_cpu(i)
+ unregister_fair_sched_group(tg, i);
spin_unlock_irqrestore(&task_group_lock, flags);
/* wait for any ongoing reference to this group to finish */
@@ -7822,11 +7893,8 @@ int sched_group_set_shares(struct task_group *tg, unsigned long shares)
* each cpu's rq->leaf_cfs_rq_list.
*/
spin_lock_irqsave(&task_group_lock, flags);
- for_each_possible_cpu(i) {
- rq = cpu_rq(i);
- cfs_rq = tg->cfs_rq[i];
- list_add_rcu(&cfs_rq->leaf_cfs_rq_list, &rq->leaf_cfs_rq_list);
- }
+ for_each_possible_cpu(i)
+ register_fair_sched_group(tg, i);
spin_unlock_irqrestore(&task_group_lock, flags);
done:
mutex_unlock(&shares_mutex);
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