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 * ELF extended numbering allows more than 65535 sections, so 16-bit bound is 30 * not a hard limit any more. Although some userspace tools can be surprised by 31 * that. 32 */ 33 #define MAPCOUNT_ELF_CORE_MARGIN (5) 34 #define DEFAULT_MAX_MAP_COUNT (USHRT_MAX - MAPCOUNT_ELF_CORE_MARGIN) 35 36 extern int sysctl_max_map_count; 37 38 extern unsigned int sysctl_sched_latency; 39 extern unsigned int sysctl_sched_min_granularity; 40 extern unsigned int sysctl_sched_wakeup_granularity; 41 extern unsigned int sysctl_sched_child_runs_first; 42 43 enum sched_tunable_scaling { 44 SCHED_TUNABLESCALING_NONE, 45 SCHED_TUNABLESCALING_LOG, 46 SCHED_TUNABLESCALING_LINEAR, 47 SCHED_TUNABLESCALING_END, 48 }; 49 extern enum sched_tunable_scaling sysctl_sched_tunable_scaling; 50 51 extern unsigned int sysctl_numa_balancing_scan_delay; 52 extern unsigned int sysctl_numa_balancing_scan_period_min; 53 extern unsigned int sysctl_numa_balancing_scan_period_max; 54 extern unsigned int sysctl_numa_balancing_scan_size; 55 56 #ifdef CONFIG_SCHED_DEBUG 57 extern unsigned int sysctl_sched_migration_cost; 58 extern unsigned int sysctl_sched_nr_migrate; 59 extern unsigned int sysctl_sched_time_avg; 60 extern unsigned int sysctl_sched_shares_window; 61 62 int sched_proc_update_handler(struct ctl_table *table, int write, 63 void __user *buffer, size_t *length, 64 loff_t *ppos); 65 #endif 66 67 /* 68 * control realtime throttling: 69 * 70 * /proc/sys/kernel/sched_rt_period_us 71 * /proc/sys/kernel/sched_rt_runtime_us 72 */ 73 extern unsigned int sysctl_sched_rt_period; 74 extern int sysctl_sched_rt_runtime; 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 sched_rr_timeslice; 85 86 extern int sched_rr_handler(struct ctl_table *table, int write, 87 void __user *buffer, size_t *lenp, 88 loff_t *ppos); 89 90 extern int sched_rt_handler(struct ctl_table *table, int write, 91 void __user *buffer, size_t *lenp, 92 loff_t *ppos); 93 94 extern int sysctl_numa_balancing(struct ctl_table *table, int write, 95 void __user *buffer, size_t *lenp, 96 loff_t *ppos); 97 98 #endif /* _SCHED_SYSCTL_H */ 99