Commit | Line | Data |
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8ac773b4 AD |
1 | #ifndef __INCLUDE_LINUX_OOM_H |
2 | #define __INCLUDE_LINUX_OOM_H | |
3 | ||
a63d83f4 DR |
4 | /* |
5 | * /proc/<pid>/oom_score_adj set to OOM_SCORE_ADJ_MIN disables oom killing for | |
6 | * pid. | |
7 | */ | |
8 | #define OOM_SCORE_ADJ_MIN (-1000) | |
9 | #define OOM_SCORE_ADJ_MAX 1000 | |
10 | ||
5a3135c2 DR |
11 | #ifdef __KERNEL__ |
12 | ||
a63d83f4 | 13 | #include <linux/sched.h> |
172acf60 | 14 | #include <linux/types.h> |
4365a567 | 15 | #include <linux/nodemask.h> |
172acf60 DR |
16 | |
17 | struct zonelist; | |
18 | struct notifier_block; | |
74bcbf40 AM |
19 | struct mem_cgroup; |
20 | struct task_struct; | |
172acf60 | 21 | |
70e24bdf DR |
22 | /* |
23 | * Types of limitations to the nodes from which allocations may occur | |
24 | */ | |
25 | enum oom_constraint { | |
26 | CONSTRAINT_NONE, | |
27 | CONSTRAINT_CPUSET, | |
28 | CONSTRAINT_MEMORY_POLICY, | |
309ed882 | 29 | CONSTRAINT_MEMCG, |
70e24bdf DR |
30 | }; |
31 | ||
9cbb78bb DR |
32 | enum oom_scan_t { |
33 | OOM_SCAN_OK, /* scan thread and find its badness */ | |
34 | OOM_SCAN_CONTINUE, /* do not consider thread for oom kill */ | |
35 | OOM_SCAN_ABORT, /* abort the iteration and return */ | |
36 | OOM_SCAN_SELECT, /* always select this thread first */ | |
37 | }; | |
38 | ||
43362a49 | 39 | extern void compare_swap_oom_score_adj(int old_val, int new_val); |
72788c38 DR |
40 | extern int test_set_oom_score_adj(int new_val); |
41 | ||
a7f638f9 DR |
42 | extern unsigned long oom_badness(struct task_struct *p, |
43 | struct mem_cgroup *memcg, const nodemask_t *nodemask, | |
44 | unsigned long totalpages); | |
9cbb78bb DR |
45 | extern void oom_kill_process(struct task_struct *p, gfp_t gfp_mask, int order, |
46 | unsigned int points, unsigned long totalpages, | |
47 | struct mem_cgroup *memcg, nodemask_t *nodemask, | |
48 | const char *message); | |
49 | ||
ff321fea | 50 | extern int try_set_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags); |
dd1a239f | 51 | extern void clear_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags); |
098d7f12 | 52 | |
876aafbf DR |
53 | extern void check_panic_on_oom(enum oom_constraint constraint, gfp_t gfp_mask, |
54 | int order, const nodemask_t *nodemask); | |
55 | ||
9cbb78bb DR |
56 | extern enum oom_scan_t oom_scan_process_thread(struct task_struct *task, |
57 | unsigned long totalpages, const nodemask_t *nodemask, | |
58 | bool force_kill); | |
62ce1c70 DR |
59 | extern void mem_cgroup_out_of_memory(struct mem_cgroup *memcg, gfp_t gfp_mask, |
60 | int order); | |
9cbb78bb | 61 | |
4365a567 | 62 | extern void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask, |
08ab9b10 | 63 | int order, nodemask_t *mask, bool force_kill); |
5a3135c2 DR |
64 | extern int register_oom_notifier(struct notifier_block *nb); |
65 | extern int unregister_oom_notifier(struct notifier_block *nb); | |
66 | ||
1a8670a2 AD |
67 | extern bool oom_killer_disabled; |
68 | ||
69 | static inline void oom_killer_disable(void) | |
70 | { | |
71 | oom_killer_disabled = true; | |
72 | } | |
73 | ||
74 | static inline void oom_killer_enable(void) | |
75 | { | |
76 | oom_killer_disabled = false; | |
77 | } | |
8e4228e1 | 78 | |
158e0a2d KH |
79 | extern struct task_struct *find_lock_task_mm(struct task_struct *p); |
80 | ||
8e4228e1 DR |
81 | /* sysctls */ |
82 | extern int sysctl_oom_dump_tasks; | |
83 | extern int sysctl_oom_kill_allocating_task; | |
84 | extern int sysctl_panic_on_oom; | |
5a3135c2 DR |
85 | #endif /* __KERNEL__*/ |
86 | #endif /* _INCLUDE_LINUX_OOM_H */ |