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 28 struct zonelist; 29 struct notifier_block; 30 struct mem_cgroup; 31 struct task_struct; 32 33 /* 34 * Types of limitations to the nodes from which allocations may occur 35 */ 36 enum oom_constraint { 37 CONSTRAINT_NONE, 38 CONSTRAINT_CPUSET, 39 CONSTRAINT_MEMORY_POLICY, 40 CONSTRAINT_MEMCG, 41 }; 42 43 extern void compare_swap_oom_score_adj(int old_val, int new_val); 44 extern int test_set_oom_score_adj(int new_val); 45 46 extern unsigned int oom_badness(struct task_struct *p, struct mem_cgroup *memcg, 47 const nodemask_t *nodemask, unsigned long totalpages); 48 extern int try_set_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags); 49 extern void clear_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags); 50 51 extern void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask, 52 int order, nodemask_t *mask); 53 extern int register_oom_notifier(struct notifier_block *nb); 54 extern int unregister_oom_notifier(struct notifier_block *nb); 55 56 extern bool oom_killer_disabled; 57 58 static inline void oom_killer_disable(void) 59 { 60 oom_killer_disabled = true; 61 } 62 63 static inline void oom_killer_enable(void) 64 { 65 oom_killer_disabled = false; 66 } 67 68 extern struct task_struct *find_lock_task_mm(struct task_struct *p); 69 70 /* sysctls */ 71 extern int sysctl_oom_dump_tasks; 72 extern int sysctl_oom_kill_allocating_task; 73 extern int sysctl_panic_on_oom; 74 #endif /* __KERNEL__*/ 75 #endif /* _INCLUDE_LINUX_OOM_H */ 76