1 #ifndef __INCLUDE_LINUX_OOM_H
2 #define __INCLUDE_LINUX_OOM_H
5 #include <linux/sched.h>
6 #include <linux/types.h>
7 #include <linux/nodemask.h>
8 #include <uapi/linux/oom.h>
11 struct notifier_block;
16 * Details of the page allocation that triggered the oom killer that are used to
17 * determine what should be killed.
20 /* Used to determine cpuset */
21 struct zonelist *zonelist;
23 /* Used to determine mempolicy */
26 /* Memory cgroup in which oom is invoked, or NULL for global oom */
27 struct mem_cgroup *memcg;
29 /* Used to determine cpuset and node locality requirement */
33 * order == -1 means the oom kill is required by sysrq, otherwise only
34 * for display purposes.
40 * Types of limitations to the nodes from which allocations may occur
45 CONSTRAINT_MEMORY_POLICY,
50 OOM_SCAN_OK, /* scan thread and find its badness */
51 OOM_SCAN_CONTINUE, /* do not consider thread for oom kill */
52 OOM_SCAN_ABORT, /* abort the iteration and return */
53 OOM_SCAN_SELECT, /* always select this thread first */
56 extern struct mutex oom_lock;
58 static inline void set_current_oom_origin(void)
60 current->signal->oom_flag_origin = true;
63 static inline void clear_current_oom_origin(void)
65 current->signal->oom_flag_origin = false;
68 static inline bool oom_task_origin(const struct task_struct *p)
70 return p->signal->oom_flag_origin;
73 extern void mark_oom_victim(struct task_struct *tsk);
76 extern void wake_oom_reaper(struct task_struct *tsk);
78 static inline void wake_oom_reaper(struct task_struct *tsk)
83 extern unsigned long oom_badness(struct task_struct *p,
84 struct mem_cgroup *memcg, const nodemask_t *nodemask,
85 unsigned long totalpages);
87 extern void oom_kill_process(struct oom_control *oc, struct task_struct *p,
88 unsigned int points, unsigned long totalpages,
91 extern void check_panic_on_oom(struct oom_control *oc,
92 enum oom_constraint constraint);
94 extern enum oom_scan_t oom_scan_process_thread(struct oom_control *oc,
95 struct task_struct *task);
97 extern bool out_of_memory(struct oom_control *oc);
99 extern void exit_oom_victim(struct task_struct *tsk);
101 extern int register_oom_notifier(struct notifier_block *nb);
102 extern int unregister_oom_notifier(struct notifier_block *nb);
104 extern bool oom_killer_disabled;
105 extern bool oom_killer_disable(void);
106 extern void oom_killer_enable(void);
108 extern struct task_struct *find_lock_task_mm(struct task_struct *p);
110 bool task_will_free_mem(struct task_struct *task);
113 extern int sysctl_oom_dump_tasks;
114 extern int sysctl_oom_kill_allocating_task;
115 extern int sysctl_panic_on_oom;
116 #endif /* _INCLUDE_LINUX_OOM_H */