diff options
| -rw-r--r-- | include/linux/sched.h | 3 | ||||
| -rw-r--r-- | kernel/sched.c | 43 | ||||
| -rw-r--r-- | kernel/user.c | 2 |
3 files changed, 45 insertions, 3 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index fa14781747cb..ada24022d230 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -2051,6 +2051,9 @@ extern void normalize_rt_tasks(void); #ifdef CONFIG_GROUP_SCHED extern struct task_group init_task_group; +#ifdef CONFIG_USER_SCHED +extern struct task_group root_task_group; +#endif extern struct task_group *sched_create_group(struct task_group *parent); extern void sched_destroy_group(struct task_group *tg); diff --git a/kernel/sched.c b/kernel/sched.c index f9c8da798bbf..e03b45ccf789 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -274,6 +274,14 @@ struct task_group { }; #ifdef CONFIG_USER_SCHED + +/* + * Root task group. + * Every UID task group (including init_task_group aka UID-0) will + * be a child to this group. + */ +struct task_group root_task_group; + #ifdef CONFIG_FAIR_GROUP_SCHED /* Default task group's sched entity on each cpu */ static DEFINE_PER_CPU(struct sched_entity, init_sched_entity); @@ -285,6 +293,8 @@ static DEFINE_PER_CPU(struct cfs_rq, init_cfs_rq) ____cacheline_aligned_in_smp; static DEFINE_PER_CPU(struct sched_rt_entity, init_sched_rt_entity); static DEFINE_PER_CPU(struct rt_rq, init_rt_rq) ____cacheline_aligned_in_smp; #endif +#else +#define root_task_group init_task_group #endif /* task_group_lock serializes add/remove of task groups and also changes to @@ -7508,6 +7518,9 @@ void __init sched_init(void) #ifdef CONFIG_RT_GROUP_SCHED alloc_size += 2 * nr_cpu_ids * sizeof(void **); #endif +#ifdef CONFIG_USER_SCHED + alloc_size *= 2; +#endif /* * As sched_init() is called before page_alloc is setup, * we use alloc_bootmem(). @@ -7521,12 +7534,29 @@ void __init sched_init(void) init_task_group.cfs_rq = (struct cfs_rq **)ptr; ptr += nr_cpu_ids * sizeof(void **); + +#ifdef CONFIG_USER_SCHED + root_task_group.se = (struct sched_entity **)ptr; + ptr += nr_cpu_ids * sizeof(void **); + + root_task_group.cfs_rq = (struct cfs_rq **)ptr; + ptr += nr_cpu_ids * sizeof(void **); +#endif #endif #ifdef CONFIG_RT_GROUP_SCHED init_task_group.rt_se = (struct sched_rt_entity **)ptr; ptr += nr_cpu_ids * sizeof(void **); init_task_group.rt_rq = (struct rt_rq **)ptr; + ptr += nr_cpu_ids * sizeof(void **); + +#ifdef CONFIG_USER_SCHED + root_task_group.rt_se = (struct sched_rt_entity **)ptr; + ptr += nr_cpu_ids * sizeof(void **); + + root_task_group.rt_rq = (struct rt_rq **)ptr; + ptr += nr_cpu_ids * sizeof(void **); +#endif #endif } @@ -7540,6 +7570,10 @@ void __init sched_init(void) #ifdef CONFIG_RT_GROUP_SCHED init_rt_bandwidth(&init_task_group.rt_bandwidth, global_rt_period(), global_rt_runtime()); +#ifdef CONFIG_USER_SCHED + init_rt_bandwidth(&root_task_group.rt_bandwidth, + global_rt_period(), RUNTIME_INF); +#endif #endif #ifdef CONFIG_GROUP_SCHED @@ -7582,6 +7616,8 @@ void __init sched_init(void) */ init_tg_cfs_entry(&init_task_group, &rq->cfs, NULL, i, 1, NULL); #elif defined CONFIG_USER_SCHED + root_task_group.shares = NICE_0_LOAD; + init_tg_cfs_entry(&root_task_group, &rq->cfs, NULL, i, 0, NULL); /* * In case of task-groups formed thr' the user id of tasks, * init_task_group represents tasks belonging to root user. @@ -7595,7 +7631,8 @@ void __init sched_init(void) */ init_tg_cfs_entry(&init_task_group, &per_cpu(init_cfs_rq, i), - &per_cpu(init_sched_entity, i), i, 1, NULL); + &per_cpu(init_sched_entity, i), i, 1, + root_task_group.se[i]); #endif #endif /* CONFIG_FAIR_GROUP_SCHED */ @@ -7606,9 +7643,11 @@ void __init sched_init(void) #ifdef CONFIG_CGROUP_SCHED init_tg_rt_entry(&init_task_group, &rq->rt, NULL, i, 1, NULL); #elif defined CONFIG_USER_SCHED + init_tg_rt_entry(&root_task_group, &rq->rt, NULL, i, 0, NULL); init_tg_rt_entry(&init_task_group, &per_cpu(init_rt_rq, i), - &per_cpu(init_sched_rt_entity, i), i, 1, NULL); + &per_cpu(init_sched_rt_entity, i), i, 1, + root_task_group.rt_se[i]); #endif #endif diff --git a/kernel/user.c b/kernel/user.c index a28d9f992468..debce602bfdd 100644 --- a/kernel/user.c +++ b/kernel/user.c @@ -101,7 +101,7 @@ static int sched_create_user(struct user_struct *up) { int rc = 0; - up->tg = sched_create_group(NULL); + up->tg = sched_create_group(&root_task_group); if (IS_ERR(up->tg)) rc = -ENOMEM; |