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 * Types of limitations to the nodes from which allocations may occur
21 CONSTRAINT_MEMORY_POLICY
,
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 */
32 extern void compare_swap_oom_score_adj(int old_val
, int new_val
);
33 extern int test_set_oom_score_adj(int new_val
);
35 extern unsigned long oom_badness(struct task_struct
*p
,
36 struct mem_cgroup
*memcg
, const nodemask_t
*nodemask
,
37 unsigned long totalpages
);
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
,
43 extern int try_set_zonelist_oom(struct zonelist
*zonelist
, gfp_t gfp_flags
);
44 extern void clear_zonelist_oom(struct zonelist
*zonelist
, gfp_t gfp_flags
);
46 extern void check_panic_on_oom(enum oom_constraint constraint
, gfp_t gfp_mask
,
47 int order
, const nodemask_t
*nodemask
);
49 extern enum oom_scan_t
oom_scan_process_thread(struct task_struct
*task
,
50 unsigned long totalpages
, const nodemask_t
*nodemask
,
52 extern void mem_cgroup_out_of_memory(struct mem_cgroup
*memcg
, gfp_t gfp_mask
,
55 extern void out_of_memory(struct zonelist
*zonelist
, gfp_t gfp_mask
,
56 int order
, nodemask_t
*mask
, bool force_kill
);
57 extern int register_oom_notifier(struct notifier_block
*nb
);
58 extern int unregister_oom_notifier(struct notifier_block
*nb
);
60 extern bool oom_killer_disabled
;
62 static inline void oom_killer_disable(void)
64 oom_killer_disabled
= true;
67 static inline void oom_killer_enable(void)
69 oom_killer_disabled
= false;
72 extern struct task_struct
*find_lock_task_mm(struct task_struct
*p
);
75 extern int sysctl_oom_dump_tasks
;
76 extern int sysctl_oom_kill_allocating_task
;
77 extern int sysctl_panic_on_oom
;
78 #endif /* _INCLUDE_LINUX_OOM_H */