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 | #include <linux/cgroup.h> |
11 | |
12 | struct seq_file; |
13 | struct css_set; |
14 | |
15 | #ifdef CONFIG_PSI |
16 | |
17 | extern struct static_key_false psi_disabled; |
18 | extern struct psi_group psi_system; |
19 | |
20 | void psi_init(void); |
21 | |
22 | void psi_memstall_enter(unsigned long *flags); |
23 | void psi_memstall_leave(unsigned long *flags); |
24 | |
25 | int psi_show(struct seq_file *s, struct psi_group *group, enum psi_res res); |
26 | struct psi_trigger *psi_trigger_create(struct psi_group *group, char *buf, |
27 | enum psi_res res, struct file *file, |
28 | struct kernfs_open_file *of); |
29 | void psi_trigger_destroy(struct psi_trigger *t); |
30 | |
31 | __poll_t psi_trigger_poll(void **trigger_ptr, struct file *file, |
32 | poll_table *wait); |
33 | |
34 | #ifdef CONFIG_CGROUPS |
35 | static inline struct psi_group *cgroup_psi(struct cgroup *cgrp) |
36 | { |
37 | return cgroup_ino(cgrp) == 1 ? &psi_system : cgrp->psi; |
38 | } |
39 | |
40 | int psi_cgroup_alloc(struct cgroup *cgrp); |
41 | void psi_cgroup_free(struct cgroup *cgrp); |
42 | void cgroup_move_task(struct task_struct *p, struct css_set *to); |
43 | void psi_cgroup_restart(struct psi_group *group); |
44 | #endif |
45 | |
46 | #else /* CONFIG_PSI */ |
47 | |
48 | static inline void psi_init(void) {} |
49 | |
50 | static inline void psi_memstall_enter(unsigned long *flags) {} |
51 | static inline void psi_memstall_leave(unsigned long *flags) {} |
52 | |
53 | #ifdef CONFIG_CGROUPS |
54 | static inline int psi_cgroup_alloc(struct cgroup *cgrp) |
55 | { |
56 | return 0; |
57 | } |
58 | static inline void psi_cgroup_free(struct cgroup *cgrp) |
59 | { |
60 | } |
61 | static inline void cgroup_move_task(struct task_struct *p, struct css_set *to) |
62 | { |
63 | rcu_assign_pointer(p->cgroups, to); |
64 | } |
65 | static inline void psi_cgroup_restart(struct psi_group *group) {} |
66 | #endif |
67 | |
68 | #endif /* CONFIG_PSI */ |
69 | |
70 | #endif /* _LINUX_PSI_H */ |
71 | |