Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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linux
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);
20void psi_task_switch(struct task_struct *prev, struct task_struct *next,
21 bool sleep);
22
23void psi_memstall_tick(struct task_struct *task, int cpu);
24void psi_memstall_enter(unsigned long *flags);
25void psi_memstall_leave(unsigned long *flags);
26
27int psi_show(struct seq_file *s, struct psi_group *group, enum psi_res res);
28
29#ifdef CONFIG_CGROUPS
30int psi_cgroup_alloc(struct cgroup *cgrp);
31void psi_cgroup_free(struct cgroup *cgrp);
32void cgroup_move_task(struct task_struct *p, struct css_set *to);
33
34struct psi_trigger *psi_trigger_create(struct psi_group *group,
35 char *buf, size_t nbytes, enum psi_res res);
36void psi_trigger_replace(void **trigger_ptr, 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
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 */