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 int sysctl_hung_task_warnings;
  14 extern int proc_dohung_task_timeout_secs(struct ctl_table *table, int write,
  15                                          void __user *buffer,
  16                                          size_t *lenp, loff_t *ppos);
  17 #else
  18 /* Avoid need for ifdefs elsewhere in the code */
  19 enum { sysctl_hung_task_timeout_secs = 0 };
  20 #endif
  21
  22 extern unsigned int sysctl_sched_latency;
  23 extern unsigned int sysctl_sched_min_granularity;
  24 extern unsigned int sysctl_sched_wakeup_granularity;
  25 extern unsigned int sysctl_sched_child_runs_first;
  26
  27 enum sched_tunable_scaling {
  28         SCHED_TUNABLESCALING_NONE,
  29         SCHED_TUNABLESCALING_LOG,
  30         SCHED_TUNABLESCALING_LINEAR,
  31         SCHED_TUNABLESCALING_END,
  32 };
  33 extern enum sched_tunable_scaling sysctl_sched_tunable_scaling;
  34
  35 extern unsigned int sysctl_numa_balancing_scan_delay;
  36 extern unsigned int sysctl_numa_balancing_scan_period_min;
  37 extern unsigned int sysctl_numa_balancing_scan_period_max;
  38 extern unsigned int sysctl_numa_balancing_scan_size;
  39
  40 #ifdef CONFIG_SCHED_DEBUG
  41 extern __read_mostly unsigned int sysctl_sched_migration_cost;
  42 extern __read_mostly unsigned int sysctl_sched_nr_migrate;
  43
  44 int sched_proc_update_handler(struct ctl_table *table, int write,
  45                 void __user *buffer, size_t *length,
  46                 loff_t *ppos);
  47 #endif
  48
  49 /*
  50  *  control realtime throttling:
  51  *
  52  *  /proc/sys/kernel/sched_rt_period_us
  53  *  /proc/sys/kernel/sched_rt_runtime_us
  54  */
  55 extern unsigned int sysctl_sched_rt_period;
  56 extern int sysctl_sched_rt_runtime;
  57
  58 #ifdef CONFIG_CFS_BANDWIDTH
  59 extern unsigned int sysctl_sched_cfs_bandwidth_slice;
  60 #endif
  61
  62 #ifdef CONFIG_SCHED_AUTOGROUP
  63 extern unsigned int sysctl_sched_autogroup_enabled;
  64 #endif
  65
  66 extern int sysctl_sched_rr_timeslice;
  67 extern int sched_rr_timeslice;
  68
  69 extern int sched_rr_handler(struct ctl_table *table, int write,
  70                 void __user *buffer, size_t *lenp,
  71                 loff_t *ppos);
  72
  73 extern int sched_rt_handler(struct ctl_table *table, int write,
  74                 void __user *buffer, size_t *lenp,
  75                 loff_t *ppos);
  76
  77 extern int sysctl_numa_balancing(struct ctl_table *table, int write,
  78                                  void __user *buffer, size_t *lenp,
  79                                  loff_t *ppos);
  80
  81 extern int sysctl_schedstats(struct ctl_table *table, int write,
  82                                  void __user *buffer, size_t *lenp,
  83                                  loff_t *ppos);
  84
  85 #endif /* _LINUX_SCHED_SYSCTL_H */