70 lines
1.7 KiB
C
70 lines
1.7 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_PSI_H
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#define _LINUX_PSI_H
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#include <linux/jump_label.h>
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#include <linux/psi_types.h>
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#include <linux/sched.h>
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#include <linux/poll.h>
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#include <linux/cgroup-defs.h>
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#include <linux/cgroup.h>
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struct seq_file;
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struct css_set;
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#ifdef CONFIG_PSI
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extern struct static_key_false psi_disabled;
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extern struct psi_group psi_system;
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void psi_init(void);
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void psi_memstall_enter(unsigned long *flags);
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void psi_memstall_leave(unsigned long *flags);
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int psi_show(struct seq_file *s, struct psi_group *group, enum psi_res res);
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struct psi_trigger *psi_trigger_create(struct psi_group *group,
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char *buf, enum psi_res res);
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void psi_trigger_destroy(struct psi_trigger *t);
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__poll_t psi_trigger_poll(void **trigger_ptr, struct file *file,
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poll_table *wait);
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#ifdef CONFIG_CGROUPS
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static inline struct psi_group *cgroup_psi(struct cgroup *cgrp)
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{
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return cgroup_ino(cgrp) == 1 ? &psi_system : cgrp->psi;
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}
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int psi_cgroup_alloc(struct cgroup *cgrp);
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void psi_cgroup_free(struct cgroup *cgrp);
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void cgroup_move_task(struct task_struct *p, struct css_set *to);
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void psi_cgroup_restart(struct psi_group *group);
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#endif
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#else /* CONFIG_PSI */
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static inline void psi_init(void) {}
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static inline void psi_memstall_enter(unsigned long *flags) {}
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static inline void psi_memstall_leave(unsigned long *flags) {}
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#ifdef CONFIG_CGROUPS
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static inline int psi_cgroup_alloc(struct cgroup *cgrp)
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{
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return 0;
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}
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static inline void psi_cgroup_free(struct cgroup *cgrp)
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{
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}
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static inline void cgroup_move_task(struct task_struct *p, struct css_set *to)
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{
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rcu_assign_pointer(p->cgroups, to);
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}
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static inline void psi_cgroup_restart(struct psi_group *group) {}
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#endif
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#endif /* CONFIG_PSI */
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#endif /* _LINUX_PSI_H */
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