1#ifndef __INCLUDE_LINUX_OOM_H
2#define __INCLUDE_LINUX_OOM_H
3
4
5#include <linux/sched.h>
6#include <linux/types.h>
7#include <linux/nodemask.h>
8#include <uapi/linux/oom.h>
9
10struct zonelist;
11struct notifier_block;
12struct mem_cgroup;
13struct task_struct;
14
15
16
17
18
19struct oom_control {
20
21 struct zonelist *zonelist;
22
23
24 nodemask_t *nodemask;
25
26
27 const gfp_t gfp_mask;
28
29
30
31
32
33 const int order;
34};
35
36
37
38
39enum oom_constraint {
40 CONSTRAINT_NONE,
41 CONSTRAINT_CPUSET,
42 CONSTRAINT_MEMORY_POLICY,
43 CONSTRAINT_MEMCG,
44};
45
46enum oom_scan_t {
47 OOM_SCAN_OK,
48 OOM_SCAN_CONTINUE,
49 OOM_SCAN_ABORT,
50 OOM_SCAN_SELECT,
51};
52
53
54#define OOM_FLAG_ORIGIN ((__force oom_flags_t)0x1)
55
56extern struct mutex oom_lock;
57
58static inline void set_current_oom_origin(void)
59{
60 current->signal->oom_flags |= OOM_FLAG_ORIGIN;
61}
62
63static inline void clear_current_oom_origin(void)
64{
65 current->signal->oom_flags &= ~OOM_FLAG_ORIGIN;
66}
67
68static inline bool oom_task_origin(const struct task_struct *p)
69{
70 return !!(p->signal->oom_flags & OOM_FLAG_ORIGIN);
71}
72
73extern void mark_oom_victim(struct task_struct *tsk);
74
75extern unsigned long oom_badness(struct task_struct *p,
76 struct mem_cgroup *memcg, const nodemask_t *nodemask,
77 unsigned long totalpages);
78
79extern int oom_kills_count(void);
80extern void note_oom_kill(void);
81extern void oom_kill_process(struct oom_control *oc, struct task_struct *p,
82 unsigned int points, unsigned long totalpages,
83 struct mem_cgroup *memcg, const char *message);
84
85extern void check_panic_on_oom(struct oom_control *oc,
86 enum oom_constraint constraint,
87 struct mem_cgroup *memcg);
88
89extern enum oom_scan_t oom_scan_process_thread(struct oom_control *oc,
90 struct task_struct *task, unsigned long totalpages);
91
92extern bool out_of_memory(struct oom_control *oc);
93
94extern void exit_oom_victim(void);
95
96extern int register_oom_notifier(struct notifier_block *nb);
97extern int unregister_oom_notifier(struct notifier_block *nb);
98
99extern bool oom_killer_disabled;
100extern bool oom_killer_disable(void);
101extern void oom_killer_enable(void);
102
103extern struct task_struct *find_lock_task_mm(struct task_struct *p);
104
105static inline bool task_will_free_mem(struct task_struct *task)
106{
107
108
109
110
111
112 return (task->flags & PF_EXITING) &&
113 !(task->signal->flags & SIGNAL_GROUP_COREDUMP);
114}
115
116
117extern int sysctl_oom_dump_tasks;
118extern int sysctl_oom_kill_allocating_task;
119extern int sysctl_panic_on_oom;
120#endif
121