Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1#ifndef __INCLUDE_LINUX_OOM_H
2#define __INCLUDE_LINUX_OOM_H
3
4/*
5 * /proc/<pid>/oom_adj is deprecated, see
6 * Documentation/feature-removal-schedule.txt.
7 *
8 * /proc/<pid>/oom_adj set to -17 protects from the oom-killer
9 */
10#define OOM_DISABLE (-17)
11/* inclusive */
12#define OOM_ADJUST_MIN (-16)
13#define OOM_ADJUST_MAX 15
14
15/*
16 * /proc/<pid>/oom_score_adj set to OOM_SCORE_ADJ_MIN disables oom killing for
17 * pid.
18 */
19#define OOM_SCORE_ADJ_MIN (-1000)
20#define OOM_SCORE_ADJ_MAX 1000
21
22#ifdef __KERNEL__
23
24#include <linux/sched.h>
25#include <linux/types.h>
26#include <linux/nodemask.h>
27
28struct zonelist;
29struct notifier_block;
30struct mem_cgroup;
31struct task_struct;
32
33/*
34 * Types of limitations to the nodes from which allocations may occur
35 */
36enum oom_constraint {
37 CONSTRAINT_NONE,
38 CONSTRAINT_CPUSET,
39 CONSTRAINT_MEMORY_POLICY,
40 CONSTRAINT_MEMCG,
41};
42
43extern int test_set_oom_score_adj(int new_val);
44
45extern unsigned int oom_badness(struct task_struct *p, struct mem_cgroup *mem,
46 const nodemask_t *nodemask, unsigned long totalpages);
47extern int try_set_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags);
48extern void clear_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags);
49
50extern void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask,
51 int order, nodemask_t *mask);
52extern int register_oom_notifier(struct notifier_block *nb);
53extern int unregister_oom_notifier(struct notifier_block *nb);
54
55extern bool oom_killer_disabled;
56
57static inline void oom_killer_disable(void)
58{
59 oom_killer_disabled = true;
60}
61
62static inline void oom_killer_enable(void)
63{
64 oom_killer_disabled = false;
65}
66
67extern struct task_struct *find_lock_task_mm(struct task_struct *p);
68
69/* sysctls */
70extern int sysctl_oom_dump_tasks;
71extern int sysctl_oom_kill_allocating_task;
72extern int sysctl_panic_on_oom;
73#endif /* __KERNEL__*/
74#endif /* _INCLUDE_LINUX_OOM_H */