1 #ifndef _SCHED_SYSCTL_H
2 #define _SCHED_SYSCTL_H
4 #ifdef CONFIG_DETECT_HUNG_TASK
5 extern unsigned int sysctl_hung_task_panic;
6 extern unsigned long sysctl_hung_task_check_count;
7 extern unsigned long sysctl_hung_task_timeout_secs;
8 extern unsigned long sysctl_hung_task_warnings;
9 extern int proc_dohung_task_timeout_secs(struct ctl_table *table, int write,
11 size_t *lenp, loff_t *ppos);
13 /* Avoid need for ifdefs elsewhere in the code */
14 enum { sysctl_hung_task_timeout_secs = 0 };
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
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.
29 #define MAPCOUNT_ELF_CORE_MARGIN (5)
30 #define DEFAULT_MAX_MAP_COUNT (USHRT_MAX - MAPCOUNT_ELF_CORE_MARGIN)
32 extern int sysctl_max_map_count;
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;
39 enum sched_tunable_scaling {
40 SCHED_TUNABLESCALING_NONE,
41 SCHED_TUNABLESCALING_LOG,
42 SCHED_TUNABLESCALING_LINEAR,
43 SCHED_TUNABLESCALING_END,
45 extern enum sched_tunable_scaling sysctl_sched_tunable_scaling;
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_period_reset;
51 extern unsigned int sysctl_numa_balancing_scan_size;
52 extern unsigned int sysctl_numa_balancing_settle_count;
54 #ifdef CONFIG_SCHED_DEBUG
55 extern unsigned int sysctl_sched_migration_cost;
56 extern unsigned int sysctl_sched_nr_migrate;
57 extern unsigned int sysctl_sched_time_avg;
58 extern unsigned int sysctl_timer_migration;
59 extern unsigned int sysctl_sched_shares_window;
61 int sched_proc_update_handler(struct ctl_table *table, int write,
62 void __user *buffer, size_t *length,
65 #ifdef CONFIG_SCHED_DEBUG
66 static inline unsigned int get_sysctl_timer_migration(void)
68 return sysctl_timer_migration;
71 static inline unsigned int get_sysctl_timer_migration(void)
78 * control realtime throttling:
80 * /proc/sys/kernel/sched_rt_period_us
81 * /proc/sys/kernel/sched_rt_runtime_us
83 extern unsigned int sysctl_sched_rt_period;
84 extern int sysctl_sched_rt_runtime;
86 #ifdef CONFIG_CFS_BANDWIDTH
87 extern unsigned int sysctl_sched_cfs_bandwidth_slice;
90 #ifdef CONFIG_SCHED_AUTOGROUP
91 extern unsigned int sysctl_sched_autogroup_enabled;
95 * default timeslice is 100 msecs (used only for SCHED_RR tasks).
96 * Timeslices get refilled after they expire.
98 #define RR_TIMESLICE (100 * HZ / 1000)
100 extern int sched_rr_timeslice;
102 extern int sched_rr_handler(struct ctl_table *table, int write,
103 void __user *buffer, size_t *lenp,
106 extern int sched_rt_handler(struct ctl_table *table, int write,
107 void __user *buffer, size_t *lenp,
110 #endif /* _SCHED_SYSCTL_H */