1 #ifndef _SCHED_SYSCTL_H
2 #define _SCHED_SYSCTL_H
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
,
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 * 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
33 #define MAPCOUNT_ELF_CORE_MARGIN (5)
34 #define DEFAULT_MAX_MAP_COUNT (USHRT_MAX - MAPCOUNT_ELF_CORE_MARGIN)
36 extern int sysctl_max_map_count
;
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
;
43 enum sched_tunable_scaling
{
44 SCHED_TUNABLESCALING_NONE
,
45 SCHED_TUNABLESCALING_LOG
,
46 SCHED_TUNABLESCALING_LINEAR
,
47 SCHED_TUNABLESCALING_END
,
49 extern enum sched_tunable_scaling sysctl_sched_tunable_scaling
;
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
;
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
;
62 int sched_proc_update_handler(struct ctl_table
*table
, int write
,
63 void __user
*buffer
, size_t *length
,
68 * control realtime throttling:
70 * /proc/sys/kernel/sched_rt_period_us
71 * /proc/sys/kernel/sched_rt_runtime_us
73 extern unsigned int sysctl_sched_rt_period
;
74 extern int sysctl_sched_rt_runtime
;
76 #ifdef CONFIG_CFS_BANDWIDTH
77 extern unsigned int sysctl_sched_cfs_bandwidth_slice
;
80 #ifdef CONFIG_SCHED_AUTOGROUP
81 extern unsigned int sysctl_sched_autogroup_enabled
;
84 extern int sched_rr_timeslice
;
86 extern int sched_rr_handler(struct ctl_table
*table
, int write
,
87 void __user
*buffer
, size_t *lenp
,
90 extern int sched_rt_handler(struct ctl_table
*table
, int write
,
91 void __user
*buffer
, size_t *lenp
,
94 extern int sysctl_numa_balancing(struct ctl_table
*table
, int write
,
95 void __user
*buffer
, size_t *lenp
,
98 extern int sysctl_schedstats(struct ctl_table
*table
, int write
,
99 void __user
*buffer
, size_t *lenp
,
102 #endif /* _SCHED_SYSCTL_H */