Alexey Dobriyan | 8ac773b | 2006-10-19 23:28:32 -0700 | [diff] [blame] | 1 | #ifndef __INCLUDE_LINUX_OOM_H |
| 2 | #define __INCLUDE_LINUX_OOM_H |
| 3 | |
David Rientjes | a63d83f | 2010-08-09 17:19:46 -0700 | [diff] [blame] | 4 | /* |
David Rientjes | 51b1bd2 | 2010-08-09 17:19:47 -0700 | [diff] [blame] | 5 | * /proc/<pid>/oom_adj is deprecated, see |
| 6 | * Documentation/feature-removal-schedule.txt. |
| 7 | * |
David Rientjes | a63d83f | 2010-08-09 17:19:46 -0700 | [diff] [blame] | 8 | * /proc/<pid>/oom_adj set to -17 protects from the oom-killer |
| 9 | */ |
Alexey Dobriyan | 8ac773b | 2006-10-19 23:28:32 -0700 | [diff] [blame] | 10 | #define OOM_DISABLE (-17) |
| 11 | /* inclusive */ |
| 12 | #define OOM_ADJUST_MIN (-16) |
| 13 | #define OOM_ADJUST_MAX 15 |
| 14 | |
David Rientjes | a63d83f | 2010-08-09 17:19:46 -0700 | [diff] [blame] | 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 | |
David Rientjes | 5a3135c2 | 2007-10-16 23:25:53 -0700 | [diff] [blame] | 22 | #ifdef __KERNEL__ |
| 23 | |
David Rientjes | a63d83f | 2010-08-09 17:19:46 -0700 | [diff] [blame] | 24 | #include <linux/sched.h> |
David Rientjes | 172acf6 | 2007-10-16 23:25:59 -0700 | [diff] [blame] | 25 | #include <linux/types.h> |
KAMEZAWA Hiroyuki | 4365a56 | 2009-12-15 16:45:33 -0800 | [diff] [blame] | 26 | #include <linux/nodemask.h> |
David Rientjes | 172acf6 | 2007-10-16 23:25:59 -0700 | [diff] [blame] | 27 | |
| 28 | struct zonelist; |
| 29 | struct notifier_block; |
Andrew Morton | 74bcbf4 | 2010-08-09 17:19:43 -0700 | [diff] [blame] | 30 | struct mem_cgroup; |
| 31 | struct task_struct; |
David Rientjes | 172acf6 | 2007-10-16 23:25:59 -0700 | [diff] [blame] | 32 | |
David Rientjes | 70e24bd | 2007-10-16 23:25:53 -0700 | [diff] [blame] | 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, |
David Rientjes | 309ed88 | 2010-08-09 17:18:54 -0700 | [diff] [blame] | 40 | CONSTRAINT_MEMCG, |
David Rientjes | 70e24bd | 2007-10-16 23:25:53 -0700 | [diff] [blame] | 41 | }; |
| 42 | |
David Rientjes | 43362a4 | 2011-10-31 17:07:18 -0700 | [diff] [blame] | 43 | extern void compare_swap_oom_score_adj(int old_val, int new_val); |
David Rientjes | 72788c3 | 2011-05-24 17:11:40 -0700 | [diff] [blame] | 44 | extern int test_set_oom_score_adj(int new_val); |
| 45 | |
Johannes Weiner | 72835c8 | 2012-01-12 17:18:32 -0800 | [diff] [blame] | 46 | extern unsigned int oom_badness(struct task_struct *p, struct mem_cgroup *memcg, |
David Rientjes | a63d83f | 2010-08-09 17:19:46 -0700 | [diff] [blame] | 47 | const nodemask_t *nodemask, unsigned long totalpages); |
Minchan Kim | ff321fe | 2010-08-09 17:18:57 -0700 | [diff] [blame] | 48 | extern int try_set_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags); |
Mel Gorman | dd1a239 | 2008-04-28 02:12:17 -0700 | [diff] [blame] | 49 | extern void clear_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags); |
David Rientjes | 098d7f1 | 2007-10-16 23:25:55 -0700 | [diff] [blame] | 50 | |
KAMEZAWA Hiroyuki | 4365a56 | 2009-12-15 16:45:33 -0800 | [diff] [blame] | 51 | extern void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask, |
David Rientjes | 08ab9b1 | 2012-03-21 16:34:04 -0700 | [diff] [blame] | 52 | int order, nodemask_t *mask, bool force_kill); |
David Rientjes | 5a3135c2 | 2007-10-16 23:25:53 -0700 | [diff] [blame] | 53 | extern int register_oom_notifier(struct notifier_block *nb); |
| 54 | extern int unregister_oom_notifier(struct notifier_block *nb); |
| 55 | |
Alexey Dobriyan | 1a8670a | 2009-09-21 17:03:09 -0700 | [diff] [blame] | 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 | } |
David Rientjes | 8e4228e | 2010-08-09 17:18:56 -0700 | [diff] [blame] | 67 | |
KAMEZAWA Hiroyuki | 158e0a2 | 2010-08-10 18:03:00 -0700 | [diff] [blame] | 68 | extern struct task_struct *find_lock_task_mm(struct task_struct *p); |
| 69 | |
David Rientjes | 8e4228e | 2010-08-09 17:18:56 -0700 | [diff] [blame] | 70 | /* sysctls */ |
| 71 | extern int sysctl_oom_dump_tasks; |
| 72 | extern int sysctl_oom_kill_allocating_task; |
| 73 | extern int sysctl_panic_on_oom; |
David Rientjes | 5a3135c2 | 2007-10-16 23:25:53 -0700 | [diff] [blame] | 74 | #endif /* __KERNEL__*/ |
| 75 | #endif /* _INCLUDE_LINUX_OOM_H */ |