LXR linux/include/linux/psi.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _LINUX_PSI_H
   3#define _LINUX_PSI_H
   4
   5#include <linux/jump_label.h>
   6#include <linux/psi_types.h>
   7#include <linux/sched.h>
   8#include <linux/poll.h>
   9#include <linux/cgroup-defs.h>
  10
  11struct seq_file;
  12struct css_set;
  13
  14#ifdef CONFIG_PSI
  15
  16extern struct static_key_false psi_disabled;
  17extern struct psi_group psi_system;
  18
  19void psi_init(void);
  20
  21void psi_task_change(struct task_struct *task, int clear, int set);
  22void psi_task_switch(struct task_struct *prev, struct task_struct *next,
  23                     bool sleep);
  24
  25void psi_memstall_enter(unsigned long *flags);
  26void psi_memstall_leave(unsigned long *flags);
  27
  28int psi_show(struct seq_file *s, struct psi_group *group, enum psi_res res);
  29struct psi_trigger *psi_trigger_create(struct psi_group *group,
  30                        char *buf, size_t nbytes, enum psi_res res);
  31void psi_trigger_destroy(struct psi_trigger *t);
  32
  33__poll_t psi_trigger_poll(void **trigger_ptr, struct file *file,
  34                        poll_table *wait);
  35
  36#ifdef CONFIG_CGROUPS
  37int psi_cgroup_alloc(struct cgroup *cgrp);
  38void psi_cgroup_free(struct cgroup *cgrp);
  39void cgroup_move_task(struct task_struct *p, struct css_set *to);
  40#endif
  41
  42#else /* CONFIG_PSI */
  43
  44static inline void psi_init(void) {}
  45
  46static inline void psi_memstall_enter(unsigned long *flags) {}
  47static inline void psi_memstall_leave(unsigned long *flags) {}
  48
  49#ifdef CONFIG_CGROUPS
  50static inline int psi_cgroup_alloc(struct cgroup *cgrp)
  51{
  52        return 0;
  53}
  54static inline void psi_cgroup_free(struct cgroup *cgrp)
  55{
  56}
  57static inline void cgroup_move_task(struct task_struct *p, struct css_set *to)
  58{
  59        rcu_assign_pointer(p->cgroups, to);
  60}
  61#endif
  62
  63#endif /* CONFIG_PSI */
  64
  65#endif /* _LINUX_PSI_H */
  66