sched: rt: multi level group constraints
multi level rt constraints Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Родитель
f473aa5e02
Коммит
b40b2e8eb5
|
@ -8228,6 +8228,38 @@ static unsigned long to_ratio(u64 period, u64 runtime)
|
|||
return div64_64(runtime << 16, period);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_CGROUP_SCHED
|
||||
static int __rt_schedulable(struct task_group *tg, u64 period, u64 runtime)
|
||||
{
|
||||
struct task_group *tgi, *parent = tg->parent;
|
||||
unsigned long total = 0;
|
||||
|
||||
if (!parent) {
|
||||
if (global_rt_period() < period)
|
||||
return 0;
|
||||
|
||||
return to_ratio(period, runtime) <
|
||||
to_ratio(global_rt_period(), global_rt_runtime());
|
||||
}
|
||||
|
||||
if (ktime_to_ns(parent->rt_bandwidth.rt_period) < period)
|
||||
return 0;
|
||||
|
||||
rcu_read_lock();
|
||||
list_for_each_entry_rcu(tgi, &parent->children, siblings) {
|
||||
if (tgi == tg)
|
||||
continue;
|
||||
|
||||
total += to_ratio(ktime_to_ns(tgi->rt_bandwidth.rt_period),
|
||||
tgi->rt_bandwidth.rt_runtime);
|
||||
}
|
||||
rcu_read_unlock();
|
||||
|
||||
return total + to_ratio(period, runtime) <
|
||||
to_ratio(ktime_to_ns(parent->rt_bandwidth.rt_period),
|
||||
parent->rt_bandwidth.rt_runtime);
|
||||
}
|
||||
#elif defined CONFIG_USER_SCHED
|
||||
static int __rt_schedulable(struct task_group *tg, u64 period, u64 runtime)
|
||||
{
|
||||
struct task_group *tgi;
|
||||
|
@ -8247,6 +8279,7 @@ static int __rt_schedulable(struct task_group *tg, u64 period, u64 runtime)
|
|||
|
||||
return total + to_ratio(period, runtime) < global_ratio;
|
||||
}
|
||||
#endif
|
||||
|
||||
/* Must be called with tasklist_lock held */
|
||||
static inline int tg_has_rt_tasks(struct task_group *tg)
|
||||
|
|
Загрузка…
Ссылка в новой задаче