diff options
Diffstat (limited to 'kernel/sched/core.c')
| -rw-r--r-- | kernel/sched/core.c | 54 |
1 files changed, 52 insertions, 2 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index e8b335016c52..cb21581be5e7 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -1617,6 +1617,20 @@ static void __sched_fork(struct task_struct *p) #if defined(CONFIG_SMP) && defined(CONFIG_FAIR_GROUP_SCHED) p->se.avg.runnable_avg_period = 0; p->se.avg.runnable_avg_sum = 0; +#ifdef CONFIG_SCHED_HMP + /* keep LOAD_AVG_MAX in sync with fair.c if load avg series is changed */ +#define LOAD_AVG_MAX 47742 + if (p->mm) { + p->se.avg.hmp_last_up_migration = 0; + p->se.avg.hmp_last_down_migration = 0; + p->se.avg.load_avg_ratio = 1023; + p->se.avg.load_avg_contrib = + (1023 * scale_load_down(p->se.load.weight)); + p->se.avg.runnable_avg_period = LOAD_AVG_MAX; + p->se.avg.runnable_avg_sum = LOAD_AVG_MAX; + p->se.avg.usage_avg_sum = LOAD_AVG_MAX; + } +#endif #endif #ifdef CONFIG_SCHEDSTATS memset(&p->se.statistics, 0, sizeof(p->se.statistics)); @@ -3813,6 +3827,8 @@ static struct task_struct *find_process_by_pid(pid_t pid) return pid ? find_task_by_vpid(pid) : current; } +extern struct cpumask hmp_slow_cpu_mask; + /* Actually do priority change: must hold rq lock. */ static void __setscheduler(struct rq *rq, struct task_struct *p, int policy, int prio) @@ -3822,8 +3838,13 @@ __setscheduler(struct rq *rq, struct task_struct *p, int policy, int prio) p->normal_prio = normal_prio(p); /* we are holding p->pi_lock already */ p->prio = rt_mutex_getprio(p); - if (rt_prio(p->prio)) + if (rt_prio(p->prio)) { p->sched_class = &rt_sched_class; +#ifdef CONFIG_SCHED_HMP + if (cpumask_equal(&p->cpus_allowed, cpu_all_mask)) + do_set_cpus_allowed(p, &hmp_slow_cpu_mask); +#endif + } else p->sched_class = &fair_sched_class; set_load_weight(p); @@ -7093,13 +7114,24 @@ static inline int preempt_count_equals(int preempt_offset) return (nested == preempt_offset); } +static int __might_sleep_init_called; +int __init __might_sleep_init(void) +{ + __might_sleep_init_called = 1; + return 0; +} +early_initcall(__might_sleep_init); + void __might_sleep(const char *file, int line, int preempt_offset) { static unsigned long prev_jiffy; /* ratelimiting */ rcu_sleep_check(); /* WARN_ON_ONCE() by default, no rate limit reqd. */ if ((preempt_count_equals(preempt_offset) && !irqs_disabled()) || - system_state != SYSTEM_RUNNING || oops_in_progress) + oops_in_progress) + return; + if (system_state != SYSTEM_RUNNING && + (!__might_sleep_init_called || system_state != SYSTEM_BOOTING)) return; if (time_before(jiffies, prev_jiffy + HZ) && prev_jiffy) return; @@ -7705,6 +7737,23 @@ static void cpu_cgroup_css_offline(struct cgroup *cgrp) sched_offline_group(tg); } +static int +cpu_cgroup_allow_attach(struct cgroup *cgrp, struct cgroup_taskset *tset) +{ + const struct cred *cred = current_cred(), *tcred; + struct task_struct *task; + + cgroup_taskset_for_each(task, cgrp, tset) { + tcred = __task_cred(task); + + if ((current != task) && !capable(CAP_SYS_NICE) && + cred->euid != tcred->uid && cred->euid != tcred->suid) + return -EACCES; + } + + return 0; +} + static int cpu_cgroup_can_attach(struct cgroup *cgrp, struct cgroup_taskset *tset) { @@ -8064,6 +8113,7 @@ struct cgroup_subsys cpu_cgroup_subsys = { .css_offline = cpu_cgroup_css_offline, .can_attach = cpu_cgroup_can_attach, .attach = cpu_cgroup_attach, + .allow_attach = cpu_cgroup_allow_attach, .exit = cpu_cgroup_exit, .subsys_id = cpu_cgroup_subsys_id, .base_cftypes = cpu_files, |