oom.h revision 8e4228e1edb922afa83366803a1e5b3fa8e987c2 
1#ifndef __INCLUDE_LINUX_OOM_H
2#define __INCLUDE_LINUX_OOM_H
3
4/* /proc/<pid>/oom_adj set to -17 protects from the oom-killer */
5#define OOM_DISABLE (-17)
6/* inclusive */
7#define OOM_ADJUST_MIN (-16)
8#define OOM_ADJUST_MAX 15
9
10#ifdef __KERNEL__
11
12#include <linux/types.h>
13#include <linux/nodemask.h>
14
15struct zonelist;
16struct notifier_block;
17
18/*
19 * Types of limitations to the nodes from which allocations may occur
20 */
21enum oom_constraint {
22	CONSTRAINT_NONE,
23	CONSTRAINT_CPUSET,
24	CONSTRAINT_MEMORY_POLICY,
25	CONSTRAINT_MEMCG,
26};
27
28extern int try_set_zone_oom(struct zonelist *zonelist, gfp_t gfp_flags);
29extern void clear_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags);
30
31extern void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask,
32		int order, nodemask_t *mask);
33extern int register_oom_notifier(struct notifier_block *nb);
34extern int unregister_oom_notifier(struct notifier_block *nb);
35
36extern bool oom_killer_disabled;
37
38static inline void oom_killer_disable(void)
39{
40	oom_killer_disabled = true;
41}
42
43static inline void oom_killer_enable(void)
44{
45	oom_killer_disabled = false;
46}
47
48/* sysctls */
49extern int sysctl_oom_dump_tasks;
50extern int sysctl_oom_kill_allocating_task;
51extern int sysctl_panic_on_oom;
52#endif /* __KERNEL__*/
53#endif /* _INCLUDE_LINUX_OOM_H */
54