1 #ifndef _SCHED_SYSCTL_H 2 #define _SCHED_SYSCTL_H 3 4 #ifdef CONFIG_DETECT_HUNG_TASK 5 extern int sysctl_hung_task_check_count; 6 extern unsigned int sysctl_hung_task_panic; 7 extern unsigned long sysctl_hung_task_timeout_secs; 8 extern int sysctl_hung_task_warnings; 9 extern int proc_dohung_task_timeout_secs(struct ctl_table *table, int write, 10 void __user *buffer, 11 size_t *lenp, loff_t *ppos); 12 #else 13 /* Avoid need for ifdefs elsewhere in the code */ 14 enum { sysctl_hung_task_timeout_secs = 0 }; 15 #endif 16 17 /* 18 * Default maximum number of active map areas, this limits the number of vmas 19 * per mm struct. Users can overwrite this number by sysctl but there is a 20 * problem. 21 * 22 * When a program's coredump is generated as ELF format, a section is created 23 * per a vma. In ELF, the number of sections is represented in unsigned short. 24 * This means the number of sections should be smaller than 65535 at coredump. 25 * Because the kernel adds some informative sections to a image of program at 26 * generating coredump, we need some margin. The number of extra sections is 27 * 1-3 now and depends on arch. We use "5" as safe margin, here. 28 */ 29 #define MAPCOUNT_ELF_CORE_MARGIN (5) 30 #define DEFAULT_MAX_MAP_COUNT (USHRT_MAX - MAPCOUNT_ELF_CORE_MARGIN) 31 32 extern int sysctl_max_map_count; 33 34 extern unsigned int sysctl_sched_latency; 35 extern unsigned int sysctl_sched_min_granularity; 36 extern unsigned int sysctl_sched_wakeup_granularity; 37 extern unsigned int sysctl_sched_child_runs_first; 38 39 enum sched_tunable_scaling { 40 SCHED_TUNABLESCALING_NONE, 41 SCHED_TUNABLESCALING_LOG, 42 SCHED_TUNABLESCALING_LINEAR, 43 SCHED_TUNABLESCALING_END, 44 }; 45 extern enum sched_tunable_scaling sysctl_sched_tunable_scaling; 46 47 extern unsigned int sysctl_numa_balancing_scan_delay; 48 extern unsigned int sysctl_numa_balancing_scan_period_min; 49 extern unsigned int sysctl_numa_balancing_scan_period_max; 50 extern unsigned int sysctl_numa_balancing_scan_size; 51 52 #ifdef CONFIG_SCHED_DEBUG 53 extern unsigned int sysctl_sched_migration_cost; 54 extern unsigned int sysctl_sched_nr_migrate; 55 extern unsigned int sysctl_sched_time_avg; 56 extern unsigned int sysctl_timer_migration; 57 extern unsigned int sysctl_sched_shares_window; 58 59 int sched_proc_update_handler(struct ctl_table *table, int write, 60 void __user *buffer, size_t *length, 61 loff_t *ppos); 62 #endif 63 #ifdef CONFIG_SCHED_DEBUG 64 static inline unsigned int get_sysctl_timer_migration(void) 65 { 66 return sysctl_timer_migration; 67 } 68 #else 69 static inline unsigned int get_sysctl_timer_migration(void) 70 { 71 return 1; 72 } 73 #endif 74 75 /* 76 * control realtime throttling: 77 * 78 * /proc/sys/kernel/sched_rt_period_us 79 * /proc/sys/kernel/sched_rt_runtime_us 80 */ 81 extern unsigned int sysctl_sched_rt_period; 82 extern int sysctl_sched_rt_runtime; 83 84 #ifdef CONFIG_CFS_BANDWIDTH 85 extern unsigned int sysctl_sched_cfs_bandwidth_slice; 86 #endif 87 88 #ifdef CONFIG_SCHED_AUTOGROUP 89 extern unsigned int sysctl_sched_autogroup_enabled; 90 #endif 91 92 extern int sched_rr_timeslice; 93 94 extern int sched_rr_handler(struct ctl_table *table, int write, 95 void __user *buffer, size_t *lenp, 96 loff_t *ppos); 97 98 extern int sched_rt_handler(struct ctl_table *table, int write, 99 void __user *buffer, size_t *lenp, 100 loff_t *ppos); 101 102 extern int sysctl_numa_balancing(struct ctl_table *table, int write, 103 void __user *buffer, size_t *lenp, 104 loff_t *ppos); 105 106 #endif /* _SCHED_SYSCTL_H */ 107