psi.h (1666B)
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 11struct seq_file; 12struct css_set; 13 14#ifdef CONFIG_PSI 15 16extern struct static_key_false psi_disabled; 17extern struct psi_group psi_system; 18 19void psi_init(void); 20 21void psi_task_change(struct task_struct *task, int clear, int set); 22void psi_task_switch(struct task_struct *prev, struct task_struct *next, 23 bool sleep); 24 25void psi_memstall_enter(unsigned long *flags); 26void psi_memstall_leave(unsigned long *flags); 27 28int psi_show(struct seq_file *s, struct psi_group *group, enum psi_res res); 29struct psi_trigger *psi_trigger_create(struct psi_group *group, 30 char *buf, size_t nbytes, enum psi_res res); 31void psi_trigger_destroy(struct psi_trigger *t); 32 33__poll_t psi_trigger_poll(void **trigger_ptr, struct file *file, 34 poll_table *wait); 35 36#ifdef CONFIG_CGROUPS 37int psi_cgroup_alloc(struct cgroup *cgrp); 38void psi_cgroup_free(struct cgroup *cgrp); 39void cgroup_move_task(struct task_struct *p, struct css_set *to); 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 */