oom.h revision 1a8670a29b5277cbe601f74ab63d2c5211fb3005 
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
14struct zonelist;
15struct notifier_block;
16
17/*
18 * Types of limitations to the nodes from which allocations may occur
19 */
20enum oom_constraint {
21	CONSTRAINT_NONE,
22	CONSTRAINT_CPUSET,
23	CONSTRAINT_MEMORY_POLICY,
24};
25
26extern int try_set_zone_oom(struct zonelist *zonelist, gfp_t gfp_flags);
27extern void clear_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags);
28
29extern void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask, int order);
30extern int register_oom_notifier(struct notifier_block *nb);
31extern int unregister_oom_notifier(struct notifier_block *nb);
32
33extern bool oom_killer_disabled;
34
35static inline void oom_killer_disable(void)
36{
37	oom_killer_disabled = true;
38}
39
40static inline void oom_killer_enable(void)
41{
42	oom_killer_disabled = false;
43}
44#endif /* __KERNEL__*/
45#endif /* _INCLUDE_LINUX_OOM_H */
46