sched: fair-group: de-couple load-balancing from the rb-trees

De-couple load-balancing from the rb-trees, so that I can change their
organization.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 8 insertions, 2 deletions

diff --git a/kernel/sched.c b/kernel/sched.c
index ae1a3e936d28..3202462109f5 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -384,8 +384,12 @@ struct cfs_rq {
 
         struct rb_root tasks_timeline;
         struct rb_node *rb_leftmost;
-        struct rb_node *rb_load_balance_curr;
-        /* 'curr' points to currently running entity on this cfs_rq.
+
+        struct list_head tasks;
+        struct list_head *balance_iterator;
+
+        /*
+         * 'curr' points to currently running entity on this cfs_rq.
          * It is set to NULL otherwise (i.e when none are currently running).
          */
         struct sched_entity *curr, *next;
@@ -2525,6 +2529,7 @@ static void __sched_fork(struct task_struct *p)
 
         INIT_LIST_HEAD(&p->rt.run_list);
         p->se.on_rq = 0;
+        INIT_LIST_HEAD(&p->se.group_node);
 
 #ifdef CONFIG_PREEMPT_NOTIFIERS
         INIT_HLIST_HEAD(&p->preempt_notifiers);
@@ -7898,6 +7903,7 @@ int in_sched_functions(unsigned long addr)
 static void init_cfs_rq(struct cfs_rq *cfs_rq, struct rq *rq)
 {
         cfs_rq->tasks_timeline = RB_ROOT;
+        INIT_LIST_HEAD(&cfs_rq->tasks);
 #ifdef CONFIG_FAIR_GROUP_SCHED
         cfs_rq->rq = rq;
 #endif