projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 8ac773b4 AD |
1 | #ifndef __INCLUDE_LINUX_OOM_H |
| 2 | #define __INCLUDE_LINUX_OOM_H | |
| 3 | ||
| a63d83f4 | 4 | /* |
| 51b1bd2a DR |
5 | * /proc/<pid>/oom_adj is deprecated, see |
| 6 | * Documentation/feature-removal-schedule.txt. | |
| 7 | * | |
| a63d83f4 DR |
8 | * /proc/<pid>/oom_adj set to -17 protects from the oom-killer |
| 9 | */ | |
| 8ac773b4 AD |
10 | #define OOM_DISABLE (-17) |
| 11 | /* inclusive */ | |
| 12 | #define OOM_ADJUST_MIN (-16) | |
| 13 | #define OOM_ADJUST_MAX 15 | |
| 14 | ||
| a63d83f4 DR |
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 | ||
| 5a3135c2 DR |
22 | #ifdef __KERNEL__ |
| 23 | ||
| a63d83f4 | 24 | #include <linux/sched.h> |
| 172acf60 | 25 | #include <linux/types.h> |
| 4365a567 | 26 | #include <linux/nodemask.h> |
| 172acf60 DR |
27 | |
| 28 | struct zonelist; | |
| 29 | struct notifier_block; | |
| 74bcbf40 AM |
30 | struct mem_cgroup; |
| 31 | struct task_struct; | |
| 172acf60 | 32 | |
| 70e24bdf DR |
33 | /* |
| 34 | * Types of limitations to the nodes from which allocations may occur | |
| 35 | */ | |
| 36 | enum oom_constraint { | |
| 37 | CONSTRAINT_NONE, | |
| 38 | CONSTRAINT_CPUSET, | |
| 39 | CONSTRAINT_MEMORY_POLICY, | |
| 309ed882 | 40 | CONSTRAINT_MEMCG, |
| 70e24bdf DR |
41 | }; |
| 42 | ||
| 9cbb78bb DR |
43 | enum oom_scan_t { |
| 44 | OOM_SCAN_OK, /* scan thread and find its badness */ | |
| 45 | OOM_SCAN_CONTINUE, /* do not consider thread for oom kill */ | |
| 46 | OOM_SCAN_ABORT, /* abort the iteration and return */ | |
| 47 | OOM_SCAN_SELECT, /* always select this thread first */ | |
| 48 | }; | |
| 49 | ||
| 43362a49 | 50 | extern void compare_swap_oom_score_adj(int old_val, int new_val); |
| 72788c38 DR |
51 | extern int test_set_oom_score_adj(int new_val); |
| 52 | ||
| a7f638f9 DR |
53 | extern unsigned long oom_badness(struct task_struct *p, |
| 54 | struct mem_cgroup *memcg, const nodemask_t *nodemask, | |
| 55 | unsigned long totalpages); | |
| 9cbb78bb DR |
56 | extern void oom_kill_process(struct task_struct *p, gfp_t gfp_mask, int order, |
| 57 | unsigned int points, unsigned long totalpages, | |
| 58 | struct mem_cgroup *memcg, nodemask_t *nodemask, | |
| 59 | const char *message); | |
| 60 | ||
| ff321fea | 61 | extern int try_set_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags); |
| dd1a239f | 62 | extern void clear_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags); |
| 098d7f12 | 63 | |
| 876aafbf DR |
64 | extern void check_panic_on_oom(enum oom_constraint constraint, gfp_t gfp_mask, |
| 65 | int order, const nodemask_t *nodemask); | |
| 66 | ||
| 9cbb78bb DR |
67 | extern enum oom_scan_t oom_scan_process_thread(struct task_struct *task, |
| 68 | unsigned long totalpages, const nodemask_t *nodemask, | |
| 69 | bool force_kill); | |
| 62ce1c70 DR |
70 | extern void mem_cgroup_out_of_memory(struct mem_cgroup *memcg, gfp_t gfp_mask, |
| 71 | int order); | |
| 9cbb78bb | 72 | |
| 4365a567 | 73 | extern void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask, |
| 08ab9b10 | 74 | int order, nodemask_t *mask, bool force_kill); |
| 5a3135c2 DR |
75 | extern int register_oom_notifier(struct notifier_block *nb); |
| 76 | extern int unregister_oom_notifier(struct notifier_block *nb); | |
| 77 | ||
| 1a8670a2 AD |
78 | extern bool oom_killer_disabled; |
| 79 | ||
| 80 | static inline void oom_killer_disable(void) | |
| 81 | { | |
| 82 | oom_killer_disabled = true; | |
| 83 | } | |
| 84 | ||
| 85 | static inline void oom_killer_enable(void) | |
| 86 | { | |
| 87 | oom_killer_disabled = false; | |
| 88 | } | |
| 8e4228e1 | 89 | |
| 158e0a2d KH |
90 | extern struct task_struct *find_lock_task_mm(struct task_struct *p); |
| 91 | ||
| 8e4228e1 DR |
92 | /* sysctls */ |
| 93 | extern int sysctl_oom_dump_tasks; | |
| 94 | extern int sysctl_oom_kill_allocating_task; | |
| 95 | extern int sysctl_panic_on_oom; | |
| 5a3135c2 DR |
96 | #endif /* __KERNEL__*/ |
| 97 | #endif /* _INCLUDE_LINUX_OOM_H */ |