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