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 void psi_task_switch(struct task_struct *prev, struct task_struct *next,
21 bool sleep);
22
23 void psi_memstall_tick(struct task_struct *task, int cpu);
24 void psi_memstall_enter(unsigned long *flags);
25 void psi_memstall_leave(unsigned long *flags);
26
27 int psi_show(struct seq_file *s, struct psi_group *group, enum psi_res res);
28
29 #ifdef CONFIG_CGROUPS
30 int psi_cgroup_alloc(struct cgroup *cgrp);
31 void psi_cgroup_free(struct cgroup *cgrp);
32 void cgroup_move_task(struct task_struct *p, struct css_set *to);
33
34 struct psi_trigger *psi_trigger_create(struct psi_group *group,
35 char *buf, size_t nbytes, enum psi_res res);
36 void psi_trigger_destroy(struct psi_trigger *t);
37
38 __poll_t psi_trigger_poll(void **trigger_ptr, struct file *file,
39 poll_table *wait);
40 #endif
41
42 #else /* CONFIG_PSI */
43
psi_init(void)44 static inline void psi_init(void) {}
45
psi_memstall_enter(unsigned long * flags)46 static inline void psi_memstall_enter(unsigned long *flags) {}
psi_memstall_leave(unsigned long * flags)47 static inline void psi_memstall_leave(unsigned long *flags) {}
48
49 #ifdef CONFIG_CGROUPS
psi_cgroup_alloc(struct cgroup * cgrp)50 static inline int psi_cgroup_alloc(struct cgroup *cgrp)
51 {
52 return 0;
53 }
psi_cgroup_free(struct cgroup * cgrp)54 static inline void psi_cgroup_free(struct cgroup *cgrp)
55 {
56 }
cgroup_move_task(struct task_struct * p,struct css_set * to)57 static 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