1 #ifndef __INCLUDE_LINUX_OOM_H
2 #define __INCLUDE_LINUX_OOM_H
5 * /proc/<pid>/oom_adj is deprecated, see
6 * Documentation/feature-removal-schedule.txt.
8 * /proc/<pid>/oom_adj set to -17 protects from the oom-killer
10 #define OOM_DISABLE (-17)
12 #define OOM_ADJUST_MIN (-16)
13 #define OOM_ADJUST_MAX 15
16 * /proc/<pid>/oom_score_adj set to OOM_SCORE_ADJ_MIN disables oom killing for
19 #define OOM_SCORE_ADJ_MIN (-1000)
20 #define OOM_SCORE_ADJ_MAX 1000
24 #include <linux/sched.h>
25 #include <linux/types.h>
26 #include <linux/nodemask.h>
29 struct notifier_block;
34 * Types of limitations to the nodes from which allocations may occur
39 CONSTRAINT_MEMORY_POLICY,
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 */
50 extern void compare_swap_oom_score_adj(int old_val, int new_val);
51 extern int test_set_oom_score_adj(int new_val);
53 extern unsigned long oom_badness(struct task_struct *p,
54 struct mem_cgroup *memcg, const nodemask_t *nodemask,
55 unsigned long totalpages);
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,
61 extern int try_set_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags);
62 extern void clear_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags);
64 extern enum oom_scan_t oom_scan_process_thread(struct task_struct *task,
65 unsigned long totalpages, const nodemask_t *nodemask,
67 extern void mem_cgroup_out_of_memory(struct mem_cgroup *memcg, gfp_t gfp_mask,
70 extern void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask,
71 int order, nodemask_t *mask, bool force_kill);
72 extern int register_oom_notifier(struct notifier_block *nb);
73 extern int unregister_oom_notifier(struct notifier_block *nb);
75 extern bool oom_killer_disabled;
77 static inline void oom_killer_disable(void)
79 oom_killer_disabled = true;
82 static inline void oom_killer_enable(void)
84 oom_killer_disabled = false;
87 extern struct task_struct *find_lock_task_mm(struct task_struct *p);
90 extern int sysctl_oom_dump_tasks;
91 extern int sysctl_oom_kill_allocating_task;
92 extern int sysctl_panic_on_oom;
93 #endif /* __KERNEL__*/
94 #endif /* _INCLUDE_LINUX_OOM_H */