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cf4aebc2 CW |
1 | #ifndef _SCHED_SYSCTL_H |
2 | #define _SCHED_SYSCTL_H | |
3 | ||
4 | #ifdef CONFIG_DETECT_HUNG_TASK | |
cd64647f | 5 | extern int sysctl_hung_task_check_count; |
cf4aebc2 | 6 | extern unsigned int sysctl_hung_task_panic; |
cf4aebc2 | 7 | extern unsigned long sysctl_hung_task_timeout_secs; |
270750db | 8 | extern int sysctl_hung_task_warnings; |
cf4aebc2 CW |
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. | |
3fb1c8dc KS |
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. | |
cf4aebc2 CW |
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; | |
cf4aebc2 | 54 | extern unsigned int sysctl_numa_balancing_scan_size; |
cf4aebc2 CW |
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_timer_migration; | |
61 | extern unsigned int sysctl_sched_shares_window; | |
62 | ||
63 | int sched_proc_update_handler(struct ctl_table *table, int write, | |
64 | void __user *buffer, size_t *length, | |
65 | loff_t *ppos); | |
66 | #endif | |
67 | #ifdef CONFIG_SCHED_DEBUG | |
68 | static inline unsigned int get_sysctl_timer_migration(void) | |
69 | { | |
70 | return sysctl_timer_migration; | |
71 | } | |
72 | #else | |
73 | static inline unsigned int get_sysctl_timer_migration(void) | |
74 | { | |
75 | return 1; | |
76 | } | |
77 | #endif | |
ce0dbbbb CW |
78 | |
79 | /* | |
80 | * control realtime throttling: | |
81 | * | |
82 | * /proc/sys/kernel/sched_rt_period_us | |
83 | * /proc/sys/kernel/sched_rt_runtime_us | |
84 | */ | |
cf4aebc2 CW |
85 | extern unsigned int sysctl_sched_rt_period; |
86 | extern int sysctl_sched_rt_runtime; | |
87 | ||
88 | #ifdef CONFIG_CFS_BANDWIDTH | |
89 | extern unsigned int sysctl_sched_cfs_bandwidth_slice; | |
90 | #endif | |
91 | ||
92 | #ifdef CONFIG_SCHED_AUTOGROUP | |
93 | extern unsigned int sysctl_sched_autogroup_enabled; | |
94 | #endif | |
95 | ||
ce0dbbbb CW |
96 | extern int sched_rr_timeslice; |
97 | ||
98 | extern int sched_rr_handler(struct ctl_table *table, int write, | |
99 | void __user *buffer, size_t *lenp, | |
100 | loff_t *ppos); | |
101 | ||
102 | extern int sched_rt_handler(struct ctl_table *table, int write, | |
cf4aebc2 CW |
103 | void __user *buffer, size_t *lenp, |
104 | loff_t *ppos); | |
105 | ||
54a43d54 AK |
106 | extern int sysctl_numa_balancing(struct ctl_table *table, int write, |
107 | void __user *buffer, size_t *lenp, | |
108 | loff_t *ppos); | |
109 | ||
cf4aebc2 | 110 | #endif /* _SCHED_SYSCTL_H */ |