Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#ifndef __INCLUDE_LINUX_OOM_H
2#define __INCLUDE_LINUX_OOM_H
3
4
5#include <linux/sched.h>
6#include <linux/types.h>
7#include <linux/nodemask.h>
8#include <uapi/linux/oom.h>
9
10struct zonelist;
11struct notifier_block;
12struct mem_cgroup;
13struct task_struct;
14
15/*
16 * Types of limitations to the nodes from which allocations may occur
17 */
18enum oom_constraint {
19 CONSTRAINT_NONE,
20 CONSTRAINT_CPUSET,
21 CONSTRAINT_MEMORY_POLICY,
22 CONSTRAINT_MEMCG,
23};
24
25enum oom_scan_t {
26 OOM_SCAN_OK, /* scan thread and find its badness */
27 OOM_SCAN_CONTINUE, /* do not consider thread for oom kill */
28 OOM_SCAN_ABORT, /* abort the iteration and return */
29 OOM_SCAN_SELECT, /* always select this thread first */
30};
31
32extern void compare_swap_oom_score_adj(int old_val, int new_val);
33extern int test_set_oom_score_adj(int new_val);
34
35extern unsigned long oom_badness(struct task_struct *p,
36 struct mem_cgroup *memcg, const nodemask_t *nodemask,
37 unsigned long totalpages);
38extern void oom_kill_process(struct task_struct *p, gfp_t gfp_mask, int order,
39 unsigned int points, unsigned long totalpages,
40 struct mem_cgroup *memcg, nodemask_t *nodemask,
41 const char *message);
42
43extern int try_set_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags);
44extern void clear_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags);
45
46extern void check_panic_on_oom(enum oom_constraint constraint, gfp_t gfp_mask,
47 int order, const nodemask_t *nodemask);
48
49extern enum oom_scan_t oom_scan_process_thread(struct task_struct *task,
50 unsigned long totalpages, const nodemask_t *nodemask,
51 bool force_kill);
52extern void mem_cgroup_out_of_memory(struct mem_cgroup *memcg, gfp_t gfp_mask,
53 int order);
54
55extern void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask,
56 int order, nodemask_t *mask, bool force_kill);
57extern int register_oom_notifier(struct notifier_block *nb);
58extern int unregister_oom_notifier(struct notifier_block *nb);
59
60extern bool oom_killer_disabled;
61
62static inline void oom_killer_disable(void)
63{
64 oom_killer_disabled = true;
65}
66
67static inline void oom_killer_enable(void)
68{
69 oom_killer_disabled = false;
70}
71
72extern struct task_struct *find_lock_task_mm(struct task_struct *p);
73
74/* sysctls */
75extern int sysctl_oom_dump_tasks;
76extern int sysctl_oom_kill_allocating_task;
77extern int sysctl_panic_on_oom;
78#endif /* _INCLUDE_LINUX_OOM_H */