projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 2fb75e1b | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| eb414681 JW |
2 | #ifndef _LINUX_PSI_H |
| 3 | #define _LINUX_PSI_H | |
| 4 | ||
| e0c27447 | 5 | #include <linux/jump_label.h> |
| eb414681 JW |
6 | #include <linux/psi_types.h> |
| 7 | #include <linux/sched.h> | |
| 0e94682b | 8 | #include <linux/poll.h> |
| 3387ce4d | 9 | #include <linux/cgroup-defs.h> |
| eb414681 | 10 | |
| 2ce7135a JW |
11 | struct seq_file; |
| 12 | struct css_set; | |
| 13 | ||
| eb414681 JW |
14 | #ifdef CONFIG_PSI |
| 15 | ||
| e0c27447 | 16 | extern struct static_key_false psi_disabled; |
| df5ba5be | 17 | extern struct psi_group psi_system; |
| eb414681 JW |
18 | |
| 19 | void psi_init(void); | |
| 20 | ||
| 21 | void psi_task_change(struct task_struct *task, int clear, int set); | |
| 36b238d5 JW |
22 | void psi_task_switch(struct task_struct *prev, struct task_struct *next, |
| 23 | bool sleep); | |
| eb414681 | 24 | |
| eb414681 JW |
25 | void psi_memstall_enter(unsigned long *flags); |
| 26 | void psi_memstall_leave(unsigned long *flags); | |
| 27 | ||
| 2ce7135a | 28 | int psi_show(struct seq_file *s, struct psi_group *group, enum psi_res res); |
| 0e94682b SB |
29 | struct psi_trigger *psi_trigger_create(struct psi_group *group, |
| 30 | char *buf, size_t nbytes, enum psi_res res); | |
| a06247c6 | 31 | void psi_trigger_destroy(struct psi_trigger *t); |
| 0e94682b SB |
32 | |
| 33 | __poll_t psi_trigger_poll(void **trigger_ptr, struct file *file, | |
| 34 | poll_table *wait); | |
| 51e50fbd SB |
35 | |
| 36 | #ifdef CONFIG_CGROUPS | |
| 37 | int psi_cgroup_alloc(struct cgroup *cgrp); | |
| 38 | void psi_cgroup_free(struct cgroup *cgrp); | |
| 39 | void cgroup_move_task(struct task_struct *p, struct css_set *to); | |
| 2ce7135a JW |
40 | #endif |
| 41 | ||
| eb414681 JW |
42 | #else /* CONFIG_PSI */ |
| 43 | ||
| 44 | static inline void psi_init(void) {} | |
| 45 | ||
| 46 | static inline void psi_memstall_enter(unsigned long *flags) {} | |
| 47 | static inline void psi_memstall_leave(unsigned long *flags) {} | |
| 48 | ||
| 2ce7135a JW |
49 | #ifdef CONFIG_CGROUPS |
| 50 | static inline int psi_cgroup_alloc(struct cgroup *cgrp) | |
| 51 | { | |
| 52 | return 0; | |
| 53 | } | |
| 54 | static inline void psi_cgroup_free(struct cgroup *cgrp) | |
| 55 | { | |
| 56 | } | |
| 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 | ||
| eb414681 JW |
63 | #endif /* CONFIG_PSI */ |
| 64 | ||
| 65 | #endif /* _LINUX_PSI_H */ |