LXR linux/include/linux/psi.h

   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
   9struct seq_file;
  10struct css_set;
  11
  12#ifdef CONFIG_PSI
  13
  14extern struct static_key_false psi_disabled;
  15extern struct psi_group psi_system;
  16
  17void psi_init(void);
  18
  19void psi_task_change(struct task_struct *task, int clear, int set);
  20
  21void psi_memstall_tick(struct task_struct *task, int cpu);
  22void psi_memstall_enter(unsigned long *flags);
  23void psi_memstall_leave(unsigned long *flags);
  24
  25int psi_show(struct seq_file *s, struct psi_group *group, enum psi_res res);
  26
  27#ifdef CONFIG_CGROUPS
  28int psi_cgroup_alloc(struct cgroup *cgrp);
  29void psi_cgroup_free(struct cgroup *cgrp);
  30void cgroup_move_task(struct task_struct *p, struct css_set *to);
  31
  32struct psi_trigger *psi_trigger_create(struct psi_group *group,
  33                        char *buf, size_t nbytes, enum psi_res res);
  34void 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
  42static inline void psi_init(void) {}
  43
  44static inline void psi_memstall_enter(unsigned long *flags) {}
  45static inline void psi_memstall_leave(unsigned long *flags) {}
  46
  47#ifdef CONFIG_CGROUPS
  48static inline int psi_cgroup_alloc(struct cgroup *cgrp)
  49{
  50        return 0;
  51}
  52static inline void psi_cgroup_free(struct cgroup *cgrp)
  53{
  54}
  55static 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 */
  64