Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
10struct seq_file;
11struct css_set;
12
13#ifdef CONFIG_PSI
14
15extern struct static_key_false psi_disabled;
16extern struct psi_group psi_system;
17
18void psi_init(void);
19
20void psi_task_change(struct task_struct *task, int clear, int set);
21void psi_task_switch(struct task_struct *prev, struct task_struct *next,
22 bool sleep);
23
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);
28struct psi_trigger *psi_trigger_create(struct psi_group *group,
29 char *buf, size_t nbytes, enum psi_res res);
30void psi_trigger_destroy(struct psi_trigger *t);
31
32__poll_t psi_trigger_poll(void **trigger_ptr, struct file *file,
33 poll_table *wait);
34
35#ifdef CONFIG_CGROUPS
36int psi_cgroup_alloc(struct cgroup *cgrp);
37void psi_cgroup_free(struct cgroup *cgrp);
38void cgroup_move_task(struct task_struct *p, struct css_set *to);
39#endif
40
41#else /* CONFIG_PSI */
42
43static inline void psi_init(void) {}
44
45static inline void psi_memstall_enter(unsigned long *flags) {}
46static inline void psi_memstall_leave(unsigned long *flags) {}
47
48#ifdef CONFIG_CGROUPS
49static inline int psi_cgroup_alloc(struct cgroup *cgrp)
50{
51 return 0;
52}
53static inline void psi_cgroup_free(struct cgroup *cgrp)
54{
55}
56static inline void cgroup_move_task(struct task_struct *p, struct css_set *to)
57{
58 rcu_assign_pointer(p->cgroups, to);
59}
60#endif
61
62#endif /* CONFIG_PSI */
63
64#endif /* _LINUX_PSI_H */