Commit | Line | Data |
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8ac773b4 AD |
1 | #ifndef __INCLUDE_LINUX_OOM_H |
2 | #define __INCLUDE_LINUX_OOM_H | |
3 | ||
5a3135c2 | 4 | |
a63d83f4 | 5 | #include <linux/sched.h> |
172acf60 | 6 | #include <linux/types.h> |
4365a567 | 7 | #include <linux/nodemask.h> |
607ca46e | 8 | #include <uapi/linux/oom.h> |
172acf60 DR |
9 | |
10 | struct zonelist; | |
11 | struct notifier_block; | |
74bcbf40 AM |
12 | struct mem_cgroup; |
13 | struct task_struct; | |
172acf60 | 14 | |
70e24bdf DR |
15 | /* |
16 | * Types of limitations to the nodes from which allocations may occur | |
17 | */ | |
18 | enum oom_constraint { | |
19 | CONSTRAINT_NONE, | |
20 | CONSTRAINT_CPUSET, | |
21 | CONSTRAINT_MEMORY_POLICY, | |
309ed882 | 22 | CONSTRAINT_MEMCG, |
70e24bdf DR |
23 | }; |
24 | ||
9cbb78bb DR |
25 | enum oom_scan_t { |
26 | OOM_SCAN_OK, /* scan thread and find its badness */ | |
27 | OOM_SCAN_CONTINUE, /* do not consider thread for oom kill */ | |
28 | OOM_SCAN_ABORT, /* abort the iteration and return */ | |
29 | OOM_SCAN_SELECT, /* always select this thread first */ | |
30 | }; | |
31 | ||
43362a49 | 32 | extern void compare_swap_oom_score_adj(int old_val, int new_val); |
72788c38 DR |
33 | extern int test_set_oom_score_adj(int new_val); |
34 | ||
a7f638f9 DR |
35 | extern unsigned long oom_badness(struct task_struct *p, |
36 | struct mem_cgroup *memcg, const nodemask_t *nodemask, | |
37 | unsigned long totalpages); | |
9cbb78bb DR |
38 | extern void oom_kill_process(struct task_struct *p, gfp_t gfp_mask, int order, |
39 | unsigned int points, unsigned long totalpages, | |
40 | struct mem_cgroup *memcg, nodemask_t *nodemask, | |
41 | const char *message); | |
42 | ||
ff321fea | 43 | extern int try_set_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags); |
dd1a239f | 44 | extern void clear_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags); |
098d7f12 | 45 | |
876aafbf DR |
46 | extern void check_panic_on_oom(enum oom_constraint constraint, gfp_t gfp_mask, |
47 | int order, const nodemask_t *nodemask); | |
48 | ||
9cbb78bb DR |
49 | extern enum oom_scan_t oom_scan_process_thread(struct task_struct *task, |
50 | unsigned long totalpages, const nodemask_t *nodemask, | |
51 | bool force_kill); | |
62ce1c70 DR |
52 | extern void mem_cgroup_out_of_memory(struct mem_cgroup *memcg, gfp_t gfp_mask, |
53 | int order); | |
9cbb78bb | 54 | |
4365a567 | 55 | extern void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask, |
08ab9b10 | 56 | int order, nodemask_t *mask, bool force_kill); |
5a3135c2 DR |
57 | extern int register_oom_notifier(struct notifier_block *nb); |
58 | extern int unregister_oom_notifier(struct notifier_block *nb); | |
59 | ||
1a8670a2 AD |
60 | extern bool oom_killer_disabled; |
61 | ||
62 | static inline void oom_killer_disable(void) | |
63 | { | |
64 | oom_killer_disabled = true; | |
65 | } | |
66 | ||
67 | static inline void oom_killer_enable(void) | |
68 | { | |
69 | oom_killer_disabled = false; | |
70 | } | |
8e4228e1 | 71 | |
158e0a2d KH |
72 | extern struct task_struct *find_lock_task_mm(struct task_struct *p); |
73 | ||
8e4228e1 DR |
74 | /* sysctls */ |
75 | extern int sysctl_oom_dump_tasks; | |
76 | extern int sysctl_oom_kill_allocating_task; | |
77 | extern int sysctl_panic_on_oom; | |
5a3135c2 | 78 | #endif /* _INCLUDE_LINUX_OOM_H */ |