1 #ifndef __INCLUDE_LINUX_OOM_H
2 #define __INCLUDE_LINUX_OOM_H
5 * /proc/<pid>/oom_score_adj set to OOM_SCORE_ADJ_MIN disables oom killing for
8 #define OOM_SCORE_ADJ_MIN (-1000)
9 #define OOM_SCORE_ADJ_MAX 1000
13 #include <linux/sched.h>
14 #include <linux/types.h>
15 #include <linux/nodemask.h>
18 struct notifier_block
;
23 * Types of limitations to the nodes from which allocations may occur
28 CONSTRAINT_MEMORY_POLICY
,
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 */
39 extern void compare_swap_oom_score_adj(int old_val
, int new_val
);
40 extern int test_set_oom_score_adj(int new_val
);
42 extern unsigned long oom_badness(struct task_struct
*p
,
43 struct mem_cgroup
*memcg
, const nodemask_t
*nodemask
,
44 unsigned long totalpages
);
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
,
50 extern int try_set_zonelist_oom(struct zonelist
*zonelist
, gfp_t gfp_flags
);
51 extern void clear_zonelist_oom(struct zonelist
*zonelist
, gfp_t gfp_flags
);
53 extern void check_panic_on_oom(enum oom_constraint constraint
, gfp_t gfp_mask
,
54 int order
, const nodemask_t
*nodemask
);
56 extern enum oom_scan_t
oom_scan_process_thread(struct task_struct
*task
,
57 unsigned long totalpages
, const nodemask_t
*nodemask
,
59 extern void mem_cgroup_out_of_memory(struct mem_cgroup
*memcg
, gfp_t gfp_mask
,
62 extern void out_of_memory(struct zonelist
*zonelist
, gfp_t gfp_mask
,
63 int order
, nodemask_t
*mask
, bool force_kill
);
64 extern int register_oom_notifier(struct notifier_block
*nb
);
65 extern int unregister_oom_notifier(struct notifier_block
*nb
);
67 extern bool oom_killer_disabled
;
69 static inline void oom_killer_disable(void)
71 oom_killer_disabled
= true;
74 static inline void oom_killer_enable(void)
76 oom_killer_disabled
= false;
79 extern struct task_struct
*find_lock_task_mm(struct task_struct
*p
);
82 extern int sysctl_oom_dump_tasks
;
83 extern int sysctl_oom_kill_allocating_task
;
84 extern int sysctl_panic_on_oom
;
85 #endif /* __KERNEL__*/
86 #endif /* _INCLUDE_LINUX_OOM_H */