LXR linux/include/linux/sched/sysctl.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _LINUX_SCHED_SYSCTL_H
   3#define _LINUX_SCHED_SYSCTL_H
   4
   5#include <linux/types.h>
   6
   7struct ctl_table;
   8
   9#ifdef CONFIG_DETECT_HUNG_TASK
  10extern int           sysctl_hung_task_check_count;
  11extern unsigned int  sysctl_hung_task_panic;
  12extern unsigned long sysctl_hung_task_timeout_secs;
  13extern unsigned long sysctl_hung_task_check_interval_secs;
  14extern int sysctl_hung_task_warnings;
  15extern int proc_dohung_task_timeout_secs(struct ctl_table *table, int write,
  16                                         void __user *buffer,
  17                                         size_t *lenp, loff_t *ppos);
  18#else
  19/* Avoid need for ifdefs elsewhere in the code */
  20enum { sysctl_hung_task_timeout_secs = 0 };
  21#endif
  22
  23extern unsigned int sysctl_sched_latency;
  24extern unsigned int sysctl_sched_min_granularity;
  25extern unsigned int sysctl_sched_wakeup_granularity;
  26extern unsigned int sysctl_sched_child_runs_first;
  27
  28enum sched_tunable_scaling {
  29        SCHED_TUNABLESCALING_NONE,
  30        SCHED_TUNABLESCALING_LOG,
  31        SCHED_TUNABLESCALING_LINEAR,
  32        SCHED_TUNABLESCALING_END,
  33};
  34extern enum sched_tunable_scaling sysctl_sched_tunable_scaling;
  35
  36extern unsigned int sysctl_numa_balancing_scan_delay;
  37extern unsigned int sysctl_numa_balancing_scan_period_min;
  38extern unsigned int sysctl_numa_balancing_scan_period_max;
  39extern unsigned int sysctl_numa_balancing_scan_size;
  40
  41#ifdef CONFIG_SCHED_DEBUG
  42extern __read_mostly unsigned int sysctl_sched_migration_cost;
  43extern __read_mostly unsigned int sysctl_sched_nr_migrate;
  44
  45int sched_proc_update_handler(struct ctl_table *table, int write,
  46                void __user *buffer, size_t *length,
  47                loff_t *ppos);
  48#endif
  49
  50/*
  51 *  control realtime throttling:
  52 *
  53 *  /proc/sys/kernel/sched_rt_period_us
  54 *  /proc/sys/kernel/sched_rt_runtime_us
  55 */
  56extern unsigned int sysctl_sched_rt_period;
  57extern int sysctl_sched_rt_runtime;
  58
  59#ifdef CONFIG_UCLAMP_TASK
  60extern unsigned int sysctl_sched_uclamp_util_min;
  61extern unsigned int sysctl_sched_uclamp_util_max;
  62#endif
  63
  64#ifdef CONFIG_CFS_BANDWIDTH
  65extern unsigned int sysctl_sched_cfs_bandwidth_slice;
  66#endif
  67
  68#ifdef CONFIG_SCHED_AUTOGROUP
  69extern unsigned int sysctl_sched_autogroup_enabled;
  70#endif
  71
  72extern int sysctl_sched_rr_timeslice;
  73extern int sched_rr_timeslice;
  74
  75extern int sched_rr_handler(struct ctl_table *table, int write,
  76                void __user *buffer, size_t *lenp,
  77                loff_t *ppos);
  78
  79extern int sched_rt_handler(struct ctl_table *table, int write,
  80                void __user *buffer, size_t *lenp,
  81                loff_t *ppos);
  82
  83#ifdef CONFIG_UCLAMP_TASK
  84extern int sysctl_sched_uclamp_handler(struct ctl_table *table, int write,
  85                                       void __user *buffer, size_t *lenp,
  86                                       loff_t *ppos);
  87#endif
  88
  89extern int sysctl_numa_balancing(struct ctl_table *table, int write,
  90                                 void __user *buffer, size_t *lenp,
  91                                 loff_t *ppos);
  92
  93extern int sysctl_schedstats(struct ctl_table *table, int write,
  94                                 void __user *buffer, size_t *lenp,
  95                                 loff_t *ppos);
  96
  97#if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL)
  98extern unsigned int sysctl_sched_energy_aware;
  99extern int sched_energy_aware_handler(struct ctl_table *table, int write,
 100                                 void __user *buffer, size_t *lenp,
 101                                 loff_t *ppos);
 102#endif
 103
 104#endif /* _LINUX_SCHED_SYSCTL_H */
 105