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