Commit b1d1779e authored by Wei Yang's avatar Wei Yang Committed by Peter Zijlstra

sched/core: Simplify sched_init()

Currently root_task_group.shares and cfs_bandwidth are initialized for
each online cpu, which not necessary.

Let's take it out to do it only once.
Signed-off-by: default avatarWei Yang <richard.weiyang@gmail.com>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200423214443.29994-1-richard.weiyang@gmail.com
parent 12ac6782
...@@ -6597,6 +6597,8 @@ void __init sched_init(void) ...@@ -6597,6 +6597,8 @@ void __init sched_init(void)
root_task_group.cfs_rq = (struct cfs_rq **)ptr; root_task_group.cfs_rq = (struct cfs_rq **)ptr;
ptr += nr_cpu_ids * sizeof(void **); ptr += nr_cpu_ids * sizeof(void **);
root_task_group.shares = ROOT_TASK_GROUP_LOAD;
init_cfs_bandwidth(&root_task_group.cfs_bandwidth);
#endif /* CONFIG_FAIR_GROUP_SCHED */ #endif /* CONFIG_FAIR_GROUP_SCHED */
#ifdef CONFIG_RT_GROUP_SCHED #ifdef CONFIG_RT_GROUP_SCHED
root_task_group.rt_se = (struct sched_rt_entity **)ptr; root_task_group.rt_se = (struct sched_rt_entity **)ptr;
...@@ -6649,7 +6651,6 @@ void __init sched_init(void) ...@@ -6649,7 +6651,6 @@ void __init sched_init(void)
init_rt_rq(&rq->rt); init_rt_rq(&rq->rt);
init_dl_rq(&rq->dl); init_dl_rq(&rq->dl);
#ifdef CONFIG_FAIR_GROUP_SCHED #ifdef CONFIG_FAIR_GROUP_SCHED
root_task_group.shares = ROOT_TASK_GROUP_LOAD;
INIT_LIST_HEAD(&rq->leaf_cfs_rq_list); INIT_LIST_HEAD(&rq->leaf_cfs_rq_list);
rq->tmp_alone_branch = &rq->leaf_cfs_rq_list; rq->tmp_alone_branch = &rq->leaf_cfs_rq_list;
/* /*
...@@ -6671,7 +6672,6 @@ void __init sched_init(void) ...@@ -6671,7 +6672,6 @@ void __init sched_init(void)
* We achieve this by letting root_task_group's tasks sit * We achieve this by letting root_task_group's tasks sit
* directly in rq->cfs (i.e root_task_group->se[] = NULL). * directly in rq->cfs (i.e root_task_group->se[] = NULL).
*/ */
init_cfs_bandwidth(&root_task_group.cfs_bandwidth);
init_tg_cfs_entry(&root_task_group, &rq->cfs, NULL, i, NULL); init_tg_cfs_entry(&root_task_group, &rq->cfs, NULL, i, NULL);
#endif /* CONFIG_FAIR_GROUP_SCHED */ #endif /* CONFIG_FAIR_GROUP_SCHED */
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment