c1ad41f1f7
This reverts commit5258f386ea, because the underlying autogroups bug got fixed upstream in a better way, via:fd8ef11730Revert "sched, autogroup: Stop going ahead if autogroup is disabled" Cc: Mike Galbraith <efault@gmx.de> Cc: Yong Zhang <yong.zhang0@gmail.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@kernel.org>
64 lines
1.5 KiB
C
64 lines
1.5 KiB
C
#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 = ACCESS_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 */
|