diff options
| author | Ingo Molnar <mingo@kernel.org> | 2017-02-01 18:42:41 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-02-08 09:01:11 +0100 |
| commit | 1051408f7ecdcd1baf86f5dd5fdc44740be3b23d (patch) | |
| tree | 0056c819eef9ed51ca78d27a92e0bed73323ef4d /kernel/sched/autogroup.h | |
| parent | sched/topology: Split out scheduler topology code from core.c into topology.c (diff) | |
| download | linux-1051408f7ecdcd1baf86f5dd5fdc44740be3b23d.tar.xz linux-1051408f7ecdcd1baf86f5dd5fdc44740be3b23d.zip | |
sched/autogroup: Rename auto_group.[ch] to autogroup.[ch]
The names are all 'autogroup', not 'auto_group' - so rename
the kernel/sched/auto_group.[ch] to match the existing
nomenclature.
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched/autogroup.h')
| -rw-r--r-- | kernel/sched/autogroup.h | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/kernel/sched/autogroup.h b/kernel/sched/autogroup.h new file mode 100644 index 000000000000..890c95f2587a --- /dev/null +++ b/kernel/sched/autogroup.h @@ -0,0 +1,64 @@ +#ifdef CONFIG_SCHED_AUTOGROUP + +#include <linux/kref.h> +#include <linux/rwsem.h> + +struct autogroup { + /* + * reference doesn't mean how many thread attach to this + * autogroup now. It just stands for the number of task + * could use this autogroup. + */ + struct kref kref; + struct task_group *tg; + struct rw_semaphore lock; + unsigned long id; + int nice; +}; + +extern void autogroup_init(struct task_struct *init_task); +extern void autogroup_free(struct task_group *tg); + +static inline bool task_group_is_autogroup(struct task_group *tg) +{ + return !!tg->autogroup; +} + +extern bool task_wants_autogroup(struct task_struct *p, struct task_group *tg); + +static inline struct task_group * +autogroup_task_group(struct task_struct *p, struct task_group *tg) +{ + int enabled = READ_ONCE(sysctl_sched_autogroup_enabled); + + if (enabled && task_wants_autogroup(p, tg)) + return p->signal->autogroup->tg; + + return tg; +} + +extern int autogroup_path(struct task_group *tg, char *buf, int buflen); + +#else /* !CONFIG_SCHED_AUTOGROUP */ + +static inline void autogroup_init(struct task_struct *init_task) { } +static inline void autogroup_free(struct task_group *tg) { } +static inline bool task_group_is_autogroup(struct task_group *tg) +{ + return 0; +} + +static inline struct task_group * +autogroup_task_group(struct task_struct *p, struct task_group *tg) +{ + return tg; +} + +#ifdef CONFIG_SCHED_DEBUG +static inline int autogroup_path(struct task_group *tg, char *buf, int buflen) +{ + return 0; +} +#endif + +#endif /* CONFIG_SCHED_AUTOGROUP */ |