diff options
Diffstat (limited to 'include/linux/sched/deadline.h')
| -rw-r--r-- | include/linux/sched/deadline.h | 42 |
1 files changed, 39 insertions, 3 deletions
diff --git a/include/linux/sched/deadline.h b/include/linux/sched/deadline.h index 3a912ab42bb5..273538200a44 100644 --- a/include/linux/sched/deadline.h +++ b/include/linux/sched/deadline.h @@ -29,12 +29,48 @@ static inline bool dl_time_before(u64 a, u64 b) return (s64)(a - b) < 0; } -#ifdef CONFIG_SMP - struct root_domain; extern void dl_add_task_root_domain(struct task_struct *p); extern void dl_clear_root_domain(struct root_domain *rd); +extern void dl_clear_root_domain_cpu(int cpu); +/* + * Return whether moving DL task @p to @new_mask requires moving DL + * bandwidth accounting between root domains. This helper is specific to + * DL bandwidth move accounting semantics and is shared by + * cpuset_can_attach() and set_cpus_allowed_dl() so both paths use the + * same source root-domain test. + */ +extern bool dl_task_needs_bw_move(struct task_struct *p, + const struct cpumask *new_mask); + +extern u64 dl_cookie; +extern bool dl_bw_visited(int cpu, u64 cookie); + +static inline bool dl_server(struct sched_dl_entity *dl_se) +{ + return dl_se->dl_server; +} -#endif /* CONFIG_SMP */ +static inline struct task_struct *dl_task_of(struct sched_dl_entity *dl_se) +{ + BUG_ON(dl_server(dl_se)); + return container_of(dl_se, struct task_struct, dl); +} + +/* + * Regarding the deadline, a task with implicit deadline has a relative + * deadline == relative period. A task with constrained deadline has a + * relative deadline <= relative period. + * + * We support constrained deadline tasks. However, there are some restrictions + * applied only for tasks which do not have an implicit deadline. See + * update_dl_entity() to know more about such restrictions. + * + * The dl_is_implicit() returns true if the task has an implicit deadline. + */ +static inline bool dl_is_implicit(struct sched_dl_entity *dl_se) +{ + return dl_se->dl_deadline == dl_se->dl_period; +} #endif /* _LINUX_SCHED_DEADLINE_H */ |