include/linux/oom.h

   1 #ifndef __INCLUDE_LINUX_OOM_H
   2 #define __INCLUDE_LINUX_OOM_H
   3
   4 /* /proc/<pid>/oom_adj set to -17 protects from the oom-killer */
   5 #define OOM_DISABLE (-17)
   6 /* inclusive */
   7 #define OOM_ADJUST_MIN (-16)
   8 #define OOM_ADJUST_MAX 15
   9
  10 #ifdef __KERNEL__
  11
  12 #include <linux/types.h>
  13
  14 struct zonelist;
  15 struct notifier_block;
  16
  17 /*
  18  * Types of limitations to the nodes from which allocations may occur
  19  */
  20 enum oom_constraint {
  21         CONSTRAINT_NONE,
  22         CONSTRAINT_CPUSET,
  23         CONSTRAINT_MEMORY_POLICY,
  24 };
  25
  26 extern int try_set_zone_oom(struct zonelist *zonelist, gfp_t gfp_flags);
  27 extern void clear_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags);
  28
  29 extern void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask, int order);
  30 extern int register_oom_notifier(struct notifier_block *nb);
  31 extern int unregister_oom_notifier(struct notifier_block *nb);
  32
  33 extern bool oom_killer_disabled;
  34
  35 static inline void oom_killer_disable(void)
  36 {
  37         oom_killer_disabled = true;
  38 }
  39
  40 static inline void oom_killer_enable(void)
  41 {
  42         oom_killer_disabled = false;
  43 }
  44 #endif /* __KERNEL__*/
  45 #endif /* _INCLUDE_LINUX_OOM_H */