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sched
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auto_group.h

auto_group.h 1.3 KB
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  1. #ifdef CONFIG_SCHED_AUTOGROUP
    2. 

  2. 

  3. #include <linux/kref.h>
    4. 

  4. #include <linux/rwsem.h>
    5. 

  5. 

  6. struct autogroup {
    7. 

  7. 	struct kref		kref;
    8. 

  8. 	struct task_group	*tg;
    9. 

  9. 	struct rw_semaphore	lock;
    10. 

  10. 	unsigned long		id;
    11. 

  11. 	int			nice;
    12. 

  12. };
    13. 

  13. 

  14. extern void autogroup_init(struct task_struct *init_task);
    15. 

  15. extern void autogroup_free(struct task_group *tg);
    16. 

  16. 

  17. static inline bool task_group_is_autogroup(struct task_group *tg)
    18. 

  18. {
    19. 

  19. 	return !!tg->autogroup;
    20. 

  20. }
    21. 

  21. 

  22. extern bool task_wants_autogroup(struct task_struct *p, struct task_group *tg);
    23. 

  23. 

  24. static inline struct task_group *
    25. 

  25. autogroup_task_group(struct task_struct *p, struct task_group *tg)
    26. 

  26. {
    27. 

  27. 	int enabled = ACCESS_ONCE(sysctl_sched_autogroup_enabled);
    28. 

  28. 

  29. 	if (enabled && task_wants_autogroup(p, tg))
    30. 

  30. 		return p->signal->autogroup->tg;
    31. 

  31. 

  32. 	return tg;
    33. 

  33. }
    34. 

  34. 

  35. extern int autogroup_path(struct task_group *tg, char *buf, int buflen);
    36. 

  36. 

  37. #else /* !CONFIG_SCHED_AUTOGROUP */
    38. 

  38. 

  39. static inline void autogroup_init(struct task_struct *init_task) {  }
    40. 

  40. static inline void autogroup_free(struct task_group *tg) { }
    41. 

  41. static inline bool task_group_is_autogroup(struct task_group *tg)
    42. 

  42. {
    43. 

  43. 	return 0;
    44. 

  44. }
    45. 

  45. 

  46. static inline struct task_group *
    47. 

  47. autogroup_task_group(struct task_struct *p, struct task_group *tg)
    48. 

  48. {
    49. 

  49. 	return tg;
    50. 

  50. }
    51. 

  51. 

  52. #ifdef CONFIG_SCHED_DEBUG
    53. 

  53. static inline int autogroup_path(struct task_group *tg, char *buf, int buflen)
    54. 

  54. {
    55. 

  55. 	return 0;
    56. 

  56. }
    57. 

  57. #endif
    58. 

  58. 

  59. #endif /* CONFIG_SCHED_AUTOGROUP */
    60. 

  60.