linux/include/linux/psi_types.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_PSI_TYPES_H
#define _LINUX_PSI_TYPES_H

#include <linux/kthread.h>
#include <linux/seqlock.h>
#include <linux/types.h>
#include <linux/kref.h>
#include <linux/wait.h>

#ifdef CONFIG_PSI

/* Tracked task states */
enum psi_task_count { … };

/* Task state bitmasks */
#define TSK_IOWAIT …
#define TSK_MEMSTALL …
#define TSK_RUNNING …
#define TSK_MEMSTALL_RUNNING …

/* Only one task can be scheduled, no corresponding task count */
#define TSK_ONCPU …

/* Resources that workloads could be stalled on */
enum psi_res { … };

/*
 * Pressure states for each resource:
 *
 * SOME: Stalled tasks & working tasks
 * FULL: Stalled tasks & no working tasks
 */
enum psi_states { … };

/* Use one bit in the state mask to track TSK_ONCPU */
#define PSI_ONCPU …

/* Flag whether to re-arm avgs_work, see details in get_recent_times() */
#define PSI_STATE_RESCHEDULE …

enum psi_aggregators { … };

struct psi_group_cpu { … };

/* PSI growth tracking window */
struct psi_window { … };

struct psi_trigger { … };

struct psi_group { … };

#else /* CONFIG_PSI */

#define NR_PSI_RESOURCES …

struct psi_group { };

#endif /* CONFIG_PSI */

#endif /* _LINUX_PSI_TYPES_H */