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
   7 struct ctl_table;
   8
   9 #ifdef CONFIG_DETECT_HUNG_TASK
  10 extern int           sysctl_hung_task_check_count;
  11 extern unsigned int  sysctl_hung_task_panic;
  12 extern unsigned long sysctl_hung_task_timeout_secs;
  13 extern unsigned long sysctl_hung_task_check_interval_secs;
  14 extern int sysctl_hung_task_warnings;
  15 extern 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 */
  20 enum { sysctl_hung_task_timeout_secs = 0 };
  21 #endif
  22
  23 extern unsigned int sysctl_sched_latency;
  24 extern unsigned int sysctl_sched_min_granularity;
  25 extern unsigned int sysctl_sched_wakeup_granularity;
  26 extern unsigned int sysctl_sched_child_runs_first;
  27
  28 enum sched_tunable_scaling {
  29         SCHED_TUNABLESCALING_NONE,
  30         SCHED_TUNABLESCALING_LOG,
  31         SCHED_TUNABLESCALING_LINEAR,
  32         SCHED_TUNABLESCALING_END,
  33 };
  34 extern enum sched_tunable_scaling sysctl_sched_tunable_scaling;
  35
  36 extern unsigned int sysctl_numa_balancing_scan_delay;
  37 extern unsigned int sysctl_numa_balancing_scan_period_min;
  38 extern unsigned int sysctl_numa_balancing_scan_period_max;
  39 extern unsigned int sysctl_numa_balancing_scan_size;
  40
  41 #ifdef CONFIG_SCHED_DEBUG
  42 extern __read_mostly unsigned int sysctl_sched_migration_cost;
  43 extern __read_mostly unsigned int sysctl_sched_nr_migrate;
  44
  45 int 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  */
  56 extern unsigned int sysctl_sched_rt_period;
  57 extern int sysctl_sched_rt_runtime;
  58
  59 #ifdef CONFIG_UCLAMP_TASK
  60 extern unsigned int sysctl_sched_uclamp_util_min;
  61 extern unsigned int sysctl_sched_uclamp_util_max;
  62 #endif
  63
  64 #ifdef CONFIG_CFS_BANDWIDTH
  65 extern unsigned int sysctl_sched_cfs_bandwidth_slice;
  66 #endif
  67
  68 #ifdef CONFIG_SCHED_AUTOGROUP
  69 extern unsigned int sysctl_sched_autogroup_enabled;
  70 #endif
  71
  72 extern int sysctl_sched_rr_timeslice;
  73 extern int sched_rr_timeslice;
  74
  75 extern int sched_rr_handler(struct ctl_table *table, int write,
  76                 void __user *buffer, size_t *lenp,
  77                 loff_t *ppos);
  78
  79 extern 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
  84 extern 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
  89 extern int sysctl_numa_balancing(struct ctl_table *table, int write,
  90                                  void __user *buffer, size_t *lenp,
  91                                  loff_t *ppos);
  92
  93 extern 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)
  98 extern unsigned int sysctl_sched_energy_aware;
  99 extern 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 */