1#ifndef __INCLUDE_LINUX_OOM_H 2#define __INCLUDE_LINUX_OOM_H 3 4/* 5 * /proc/<pid>/oom_adj is deprecated, see 6 * Documentation/feature-removal-schedule.txt. 7 * 8 * /proc/<pid>/oom_adj set to -17 protects from the oom-killer 9 */ 10#define OOM_DISABLE (-17) 11/* inclusive */ 12#define OOM_ADJUST_MIN (-16) 13#define OOM_ADJUST_MAX 15 14 15/* 16 * /proc/<pid>/oom_score_adj set to OOM_SCORE_ADJ_MIN disables oom killing for 17 * pid. 18 */ 19#define OOM_SCORE_ADJ_MIN (-1000) 20#define OOM_SCORE_ADJ_MAX 1000 21 22#ifdef __KERNEL__ 23 24#include <linux/sched.h> 25#include <linux/types.h> 26#include <linux/nodemask.h> 27 28struct zonelist; 29struct notifier_block; 30struct mem_cgroup; 31struct task_struct; 32 33/* 34 * Types of limitations to the nodes from which allocations may occur 35 */ 36enum oom_constraint { 37 CONSTRAINT_NONE, 38 CONSTRAINT_CPUSET, 39 CONSTRAINT_MEMORY_POLICY, 40 CONSTRAINT_MEMCG, 41}; 42 43extern unsigned int oom_badness(struct task_struct *p, struct mem_cgroup *mem, 44 const nodemask_t *nodemask, unsigned long totalpages); 45extern int try_set_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags); 46extern void clear_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags); 47 48extern void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask, 49 int order, nodemask_t *mask); 50extern int register_oom_notifier(struct notifier_block *nb); 51extern int unregister_oom_notifier(struct notifier_block *nb); 52 53extern bool oom_killer_disabled; 54 55static inline void oom_killer_disable(void) 56{ 57 oom_killer_disabled = true; 58} 59 60static inline void oom_killer_enable(void) 61{ 62 oom_killer_disabled = false; 63} 64 65/* The badness from the OOM killer */ 66extern unsigned long badness(struct task_struct *p, struct mem_cgroup *mem, 67 const nodemask_t *nodemask, unsigned long uptime); 68 69extern struct task_struct *find_lock_task_mm(struct task_struct *p); 70 71/* sysctls */ 72extern int sysctl_oom_dump_tasks; 73extern int sysctl_oom_kill_allocating_task; 74extern int sysctl_panic_on_oom; 75#endif /* __KERNEL__*/ 76#endif /* _INCLUDE_LINUX_OOM_H */ 77