root/include/linux/psi.h

INCLUDED FROM

DEFINITIONS

1. psi_init
2. psi_memstall_enter
3. psi_memstall_leave
4. psi_cgroup_alloc
5. psi_cgroup_free
6. cgroup_move_task

   1 #ifndef _LINUX_PSI_H
   2 #define _LINUX_PSI_H
   3 
   4 #include <linux/jump_label.h>
   5 #include <linux/psi_types.h>
   6 #include <linux/sched.h>
   7 #include <linux/poll.h>
   8 
   9 struct seq_file;
  10 struct css_set;
  11 
  12 #ifdef CONFIG_PSI
  13 
  14 extern struct static_key_false psi_disabled;
  15 extern struct psi_group psi_system;
  16 
  17 void psi_init(void);
  18 
  19 void psi_task_change(struct task_struct *task, int clear, int set);
  20 
  21 void psi_memstall_tick(struct task_struct *task, int cpu);
  22 void psi_memstall_enter(unsigned long *flags);
  23 void psi_memstall_leave(unsigned long *flags);
  24 
  25 int psi_show(struct seq_file *s, struct psi_group *group, enum psi_res res);
  26 
  27 #ifdef CONFIG_CGROUPS
  28 int psi_cgroup_alloc(struct cgroup *cgrp);
  29 void psi_cgroup_free(struct cgroup *cgrp);
  30 void cgroup_move_task(struct task_struct *p, struct css_set *to);
  31 
  32 struct psi_trigger *psi_trigger_create(struct psi_group *group,
  33                         char *buf, size_t nbytes, enum psi_res res);
  34 void psi_trigger_replace(void **trigger_ptr, struct psi_trigger *t);
  35 
  36 __poll_t psi_trigger_poll(void **trigger_ptr, struct file *file,
  37                         poll_table *wait);
  38 #endif
  39 
  40 #else /* CONFIG_PSI */
  41 
  42 static inline void psi_init(void) {}
  43 
  44 static inline void psi_memstall_enter(unsigned long *flags) {}
  45 static inline void psi_memstall_leave(unsigned long *flags) {}
  46 
  47 #ifdef CONFIG_CGROUPS
  48 static inline int psi_cgroup_alloc(struct cgroup *cgrp)
  49 {
  50         return 0;
  51 }
  52 static inline void psi_cgroup_free(struct cgroup *cgrp)
  53 {
  54 }
  55 static inline void cgroup_move_task(struct task_struct *p, struct css_set *to)
  56 {
  57         rcu_assign_pointer(p->cgroups, to);
  58 }
  59 #endif
  60 
  61 #endif /* CONFIG_PSI */
  62 
  63 #endif /* _LINUX_PSI_H */