[deliverable/linux.git] / include / linux / oom.h

#ifndef __INCLUDE_LINUX_OOM_H
#define __INCLUDE_LINUX_OOM_H


#include <linux/sched.h>
#include <linux/types.h>
#include <linux/nodemask.h>
#include <uapi/linux/oom.h>

struct zonelist;
struct notifier_block;
struct mem_cgroup;
struct task_struct;

/*
 * Types of limitations to the nodes from which allocations may occur
 */
enum oom_constraint {
	CONSTRAINT_NONE,
	CONSTRAINT_CPUSET,
	CONSTRAINT_MEMORY_POLICY,
	CONSTRAINT_MEMCG,
};

enum oom_scan_t {
	OOM_SCAN_OK,		/* scan thread and find its badness */
	OOM_SCAN_CONTINUE,	/* do not consider thread for oom kill */
	OOM_SCAN_ABORT,		/* abort the iteration and return */
	OOM_SCAN_SELECT,	/* always select this thread first */
};

extern void compare_swap_oom_score_adj(short old_val, short new_val);
extern short test_set_oom_score_adj(short new_val);

extern unsigned long oom_badness(struct task_struct *p,
		struct mem_cgroup *memcg, const nodemask_t *nodemask,
		unsigned long totalpages);
extern void oom_kill_process(struct task_struct *p, gfp_t gfp_mask, int order,
			     unsigned int points, unsigned long totalpages,
			     struct mem_cgroup *memcg, nodemask_t *nodemask,
			     const char *message);

extern int try_set_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags);
extern void clear_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags);

extern void check_panic_on_oom(enum oom_constraint constraint, gfp_t gfp_mask,
			       int order, const nodemask_t *nodemask);

extern enum oom_scan_t oom_scan_process_thread(struct task_struct *task,
		unsigned long totalpages, const nodemask_t *nodemask,
		bool force_kill);

extern void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask,
		int order, nodemask_t *mask, bool force_kill);
extern int register_oom_notifier(struct notifier_block *nb);
extern int unregister_oom_notifier(struct notifier_block *nb);

extern bool oom_killer_disabled;

static inline void oom_killer_disable(void)
{
	oom_killer_disabled = true;
}

static inline void oom_killer_enable(void)
{
	oom_killer_disabled = false;
}

extern struct task_struct *find_lock_task_mm(struct task_struct *p);

/* sysctls */
extern int sysctl_oom_dump_tasks;
extern int sysctl_oom_kill_allocating_task;
extern int sysctl_panic_on_oom;
#endif /* _INCLUDE_LINUX_OOM_H */
Commit	Line	Data
	1	#ifndef __INCLUDE_LINUX_OOM_H
	2	#define __INCLUDE_LINUX_OOM_H
	3
	4
	5	#include <linux/sched.h>
	6	#include <linux/types.h>
	7	#include <linux/nodemask.h>
	8	#include <uapi/linux/oom.h>
	9
	10	struct zonelist;
	11	struct notifier_block;
	12	struct mem_cgroup;
	13	struct task_struct;
	14
	15	/*
	16	* Types of limitations to the nodes from which allocations may occur
	17	*/
	18	enum oom_constraint {
	19	CONSTRAINT_NONE,
	20	CONSTRAINT_CPUSET,
	21	CONSTRAINT_MEMORY_POLICY,
	22	CONSTRAINT_MEMCG,
	23	};
	24
	25	enum oom_scan_t {
	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 */
	30	};
	31
	32	extern void compare_swap_oom_score_adj(short old_val, short new_val);
	33	extern short test_set_oom_score_adj(short new_val);
	34
	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,
	41	const char *message);
	42
	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);
	45
	46	extern void check_panic_on_oom(enum oom_constraint constraint, gfp_t gfp_mask,
	47	int order, const nodemask_t *nodemask);
	48
	49	extern enum oom_scan_t oom_scan_process_thread(struct task_struct *task,
	50	unsigned long totalpages, const nodemask_t *nodemask,
	51	bool force_kill);
	52
	53	extern void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask,
	54	int order, nodemask_t *mask, bool force_kill);
	55	extern int register_oom_notifier(struct notifier_block *nb);
	56	extern int unregister_oom_notifier(struct notifier_block *nb);
	57
	58	extern bool oom_killer_disabled;
	59
	60	static inline void oom_killer_disable(void)
	61	{
	62	oom_killer_disabled = true;
	63	}
	64
	65	static inline void oom_killer_enable(void)
	66	{
	67	oom_killer_disabled = false;
	68	}
	69
	70	extern struct task_struct find_lock_task_mm(struct task_struct p);
	71
	72	/* sysctls */
	73	extern int sysctl_oom_dump_tasks;
	74	extern int sysctl_oom_kill_allocating_task;
	75	extern int sysctl_panic_on_oom;
	76	#endif /* _INCLUDE_LINUX_OOM_H */