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#include <linux/sched/signal.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 * Details of the page allocation that triggered the oom killer that are used to
17 * determine what should be killed.
18 */
19struct oom_control {
20 /* Used to determine cpuset */
21 struct zonelist *zonelist;
22
23 /* Used to determine mempolicy */
24 nodemask_t *nodemask;
25
26 /* Memory cgroup in which oom is invoked, or NULL for global oom */
27 struct mem_cgroup *memcg;
28
29 /* Used to determine cpuset and node locality requirement */
30 const gfp_t gfp_mask;
31
32 /*
33 * order == -1 means the oom kill is required by sysrq, otherwise only
34 * for display purposes.
35 */
36 const int order;
37
38 /* Used by oom implementation, do not set */
39 unsigned long totalpages;
40 struct task_struct *chosen;
41 unsigned long chosen_points;
42};
43
44extern struct mutex oom_lock;
45
46static inline void set_current_oom_origin(void)
47{
48 current->signal->oom_flag_origin = true;
49}
50
51static inline void clear_current_oom_origin(void)
52{
53 current->signal->oom_flag_origin = false;
54}
55
56static inline bool oom_task_origin(const struct task_struct *p)
57{
58 return p->signal->oom_flag_origin;
59}
60
61static inline bool tsk_is_oom_victim(struct task_struct * tsk)
62{
63 return tsk->signal->oom_mm;
64}
65
66extern unsigned long oom_badness(struct task_struct *p,
67 struct mem_cgroup *memcg, const nodemask_t *nodemask,
68 unsigned long totalpages);
69
70extern bool out_of_memory(struct oom_control *oc);
71
72extern void exit_oom_victim(void);
73
74extern int register_oom_notifier(struct notifier_block *nb);
75extern int unregister_oom_notifier(struct notifier_block *nb);
76
77extern bool oom_killer_disable(signed long timeout);
78extern void oom_killer_enable(void);
79
80extern struct task_struct *find_lock_task_mm(struct task_struct *p);
81
82/* sysctls */
83extern int sysctl_oom_dump_tasks;
84extern int sysctl_oom_kill_allocating_task;
85extern int sysctl_panic_on_oom;
86#endif /* _INCLUDE_LINUX_OOM_H */