diff options
| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2008-04-19 19:45:00 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-04-19 19:45:00 +0200 |
| commit | f473aa5e025bc8e0c5fe9352f65178a54adadec2 (patch) | |
| tree | 4b5f2de42e619c4a6fa62c6bc20474d5d8c9b258 /kernel/sched.c | |
| parent | eff766a65c60237bfa865160c3129de31fab591b (diff) | |
sched: task_group hierarchy
Add the full parent<->child relation thing into task_groups as well.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched.c')
| -rw-r--r-- | kernel/sched.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index e03b45ccf789..debb06a4a660 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -271,6 +271,10 @@ struct task_group { struct rcu_head rcu; struct list_head list; + + struct task_group *parent; + struct list_head siblings; + struct list_head children; }; #ifdef CONFIG_USER_SCHED @@ -7578,6 +7582,13 @@ void __init sched_init(void) #ifdef CONFIG_GROUP_SCHED list_add(&init_task_group.list, &task_groups); + INIT_LIST_HEAD(&init_task_group.children); + +#ifdef CONFIG_USER_SCHED + INIT_LIST_HEAD(&root_task_group.children); + init_task_group.parent = &root_task_group; + list_add(&init_task_group.siblings, &root_task_group.children); +#endif #endif for_each_possible_cpu(i) { @@ -8039,6 +8050,12 @@ struct task_group *sched_create_group(struct task_group *parent) register_rt_sched_group(tg, i); } list_add_rcu(&tg->list, &task_groups); + + WARN_ON(!parent); /* root should already exist */ + + tg->parent = parent; + list_add_rcu(&tg->siblings, &parent->children); + INIT_LIST_HEAD(&tg->children); spin_unlock_irqrestore(&task_group_lock, flags); return tg; @@ -8067,6 +8084,7 @@ void sched_destroy_group(struct task_group *tg) unregister_rt_sched_group(tg, i); } list_del_rcu(&tg->list); + list_del_rcu(&tg->siblings); spin_unlock_irqrestore(&task_group_lock, flags); /* wait for possible concurrent references to cfs_rqs complete */ @@ -8162,6 +8180,7 @@ int sched_group_set_shares(struct task_group *tg, unsigned long shares) spin_lock_irqsave(&task_group_lock, flags); for_each_possible_cpu(i) unregister_fair_sched_group(tg, i); + list_del_rcu(&tg->siblings); spin_unlock_irqrestore(&task_group_lock, flags); /* wait for any ongoing reference to this group to finish */ @@ -8182,6 +8201,7 @@ int sched_group_set_shares(struct task_group *tg, unsigned long shares) spin_lock_irqsave(&task_group_lock, flags); for_each_possible_cpu(i) register_fair_sched_group(tg, i); + list_add_rcu(&tg->siblings, &tg->parent->children); spin_unlock_irqrestore(&task_group_lock, flags); done: mutex_unlock(&shares_mutex); |