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 11 #ifdef CONFIG_SMP 12 extern unsigned int sysctl_hung_task_all_cpu_backtrace; 13 #else 14 #define sysctl_hung_task_all_cpu_backtrace 0 15 #endif /* CONFIG_SMP */ 16 17 extern int sysctl_hung_task_check_count; 18 extern unsigned int sysctl_hung_task_panic; 19 extern unsigned long sysctl_hung_task_timeout_secs; 20 extern unsigned long sysctl_hung_task_check_interval_secs; 21 extern int sysctl_hung_task_warnings; 22 int 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 */ 26 enum { sysctl_hung_task_timeout_secs = 0 }; 27 #endif 28 29 extern unsigned int sysctl_sched_latency; 30 extern unsigned int sysctl_sched_min_granularity; 31 extern unsigned int sysctl_sched_wakeup_granularity; 32 extern unsigned int sysctl_sched_child_runs_first; 33 34 enum sched_tunable_scaling { 35 SCHED_TUNABLESCALING_NONE, 36 SCHED_TUNABLESCALING_LOG, 37 SCHED_TUNABLESCALING_LINEAR, 38 SCHED_TUNABLESCALING_END, 39 }; 40 extern enum sched_tunable_scaling sysctl_sched_tunable_scaling; 41 42 extern unsigned int sysctl_numa_balancing_scan_delay; 43 extern unsigned int sysctl_numa_balancing_scan_period_min; 44 extern unsigned int sysctl_numa_balancing_scan_period_max; 45 extern unsigned int sysctl_numa_balancing_scan_size; 46 47 #ifdef CONFIG_SCHED_DEBUG 48 extern __read_mostly unsigned int sysctl_sched_migration_cost; 49 extern __read_mostly unsigned int sysctl_sched_nr_migrate; 50 extern int sysctl_sched_pelt_period; 51 52 int sched_proc_update_handler(struct ctl_table *table, int write, 53 void *buffer, size_t *length, loff_t *ppos); 54 int sched_pelt_period_update_handler(struct ctl_table *table, int write, 55 void *buffer, size_t *lenp, loff_t *ppos); 56 #endif 57 58 /* 59 * control realtime throttling: 60 * 61 * /proc/sys/kernel/sched_rt_period_us 62 * /proc/sys/kernel/sched_rt_runtime_us 63 */ 64 extern unsigned int sysctl_sched_rt_period; 65 extern int sysctl_sched_rt_runtime; 66 67 extern unsigned int sysctl_sched_dl_period_max; 68 extern unsigned int sysctl_sched_dl_period_min; 69 70 #ifdef CONFIG_UCLAMP_TASK 71 extern unsigned int sysctl_sched_uclamp_util_min; 72 extern unsigned int sysctl_sched_uclamp_util_max; 73 extern unsigned int sysctl_sched_uclamp_util_min_rt_default; 74 #endif 75 76 #ifdef CONFIG_CFS_BANDWIDTH 77 extern unsigned int sysctl_sched_cfs_bandwidth_slice; 78 #endif 79 80 #ifdef CONFIG_SCHED_AUTOGROUP 81 extern unsigned int sysctl_sched_autogroup_enabled; 82 #endif 83 84 extern int sysctl_sched_rr_timeslice; 85 extern int sched_rr_timeslice; 86 87 int sched_rr_handler(struct ctl_table *table, int write, void *buffer, 88 size_t *lenp, loff_t *ppos); 89 int sched_rt_handler(struct ctl_table *table, int write, void *buffer, 90 size_t *lenp, loff_t *ppos); 91 int sysctl_sched_uclamp_handler(struct ctl_table *table, int write, 92 void *buffer, size_t *lenp, loff_t *ppos); 93 int sysctl_numa_balancing(struct ctl_table *table, int write, void *buffer, 94 size_t *lenp, loff_t *ppos); 95 int sysctl_schedstats(struct ctl_table *table, int write, void *buffer, 96 size_t *lenp, loff_t *ppos); 97 98 #ifdef CONFIG_SMP 99 extern unsigned int sysctl_sched_pelt_multiplier; 100 101 int sched_pelt_multiplier(struct ctl_table *table, int write, void *buffer, 102 size_t *lenp, loff_t *ppos); 103 #endif 104 105 #if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL) 106 extern unsigned int sysctl_sched_energy_aware; 107 int sched_energy_aware_handler(struct ctl_table *table, int write, 108 void *buffer, size_t *lenp, loff_t *ppos); 109 #endif 110 111 #endif /* _LINUX_SCHED_SYSCTL_H */ 112