LXR linux/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#include <linux/nodemask.h>
  14
  15struct zonelist;
  16struct notifier_block;
  17
  18/*
  19 * Types of limitations to the nodes from which allocations may occur
  20 */
  21enum oom_constraint {
  22        CONSTRAINT_NONE,
  23        CONSTRAINT_CPUSET,
  24        CONSTRAINT_MEMORY_POLICY,
  25};
  26
  27extern int try_set_zone_oom(struct zonelist *zonelist, gfp_t gfp_flags);
  28extern void clear_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags);
  29
  30extern void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask,
  31                int order, nodemask_t *mask);
  32extern int register_oom_notifier(struct notifier_block *nb);
  33extern int unregister_oom_notifier(struct notifier_block *nb);
  34
  35extern bool oom_killer_disabled;
  36
  37static inline void oom_killer_disable(void)
  38{
  39        oom_killer_disabled = true;
  40}
  41
  42static inline void oom_killer_enable(void)
  43{
  44        oom_killer_disabled = false;
  45}
  46#endif /* __KERNEL__*/
  47#endif /* _INCLUDE_LINUX_OOM_H */
  48