struct mem_cgroup;
struct task_struct;
+/*
+ * Details of the page allocation that triggered the oom killer that are used to
+ * determine what should be killed.
+ */
+struct oom_control {
+ /* Used to determine cpuset */
+ struct zonelist *zonelist;
+
+ /* Used to determine mempolicy */
+ nodemask_t *nodemask;
+
+ /* Used to determine cpuset and node locality requirement */
+ const gfp_t gfp_mask;
+
+ /*
+ * order == -1 means the oom kill is required by sysrq, otherwise only
+ * for display purposes.
+ */
+ const int order;
+};
+
/*
* Types of limitations to the nodes from which allocations may occur
*/
/* Thread is the potential origin of an oom condition; kill first on oom */
#define OOM_FLAG_ORIGIN ((__force oom_flags_t)0x1)
+extern struct mutex oom_lock;
+
static inline void set_current_oom_origin(void)
{
current->signal->oom_flags |= OOM_FLAG_ORIGIN;
return !!(p->signal->oom_flags & OOM_FLAG_ORIGIN);
}
-extern void mark_tsk_oom_victim(struct task_struct *tsk);
-
-extern void unmark_oom_victim(void);
+extern void mark_oom_victim(struct task_struct *tsk);
extern unsigned long oom_badness(struct task_struct *p,
struct mem_cgroup *memcg, const nodemask_t *nodemask,
extern int oom_kills_count(void);
extern void note_oom_kill(void);
-extern void oom_kill_process(struct task_struct *p, gfp_t gfp_mask, int order,
+extern void oom_kill_process(struct oom_control *oc, struct task_struct *p,
unsigned int points, unsigned long totalpages,
- struct mem_cgroup *memcg, nodemask_t *nodemask,
- const char *message);
+ struct mem_cgroup *memcg, const char *message);
-extern bool oom_zonelist_trylock(struct zonelist *zonelist, gfp_t gfp_flags);
-extern void oom_zonelist_unlock(struct zonelist *zonelist, gfp_t gfp_flags);
-
-extern void check_panic_on_oom(enum oom_constraint constraint, gfp_t gfp_mask,
- int order, const nodemask_t *nodemask,
+extern void check_panic_on_oom(struct oom_control *oc,
+ enum oom_constraint constraint,
struct mem_cgroup *memcg);
-extern enum oom_scan_t oom_scan_process_thread(struct task_struct *task,
- unsigned long totalpages, const nodemask_t *nodemask,
- bool force_kill);
+extern enum oom_scan_t oom_scan_process_thread(struct oom_control *oc,
+ struct task_struct *task, unsigned long totalpages);
+
+extern bool out_of_memory(struct oom_control *oc);
+
+extern void exit_oom_victim(void);
-extern bool out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask,
- int order, nodemask_t *mask, bool force_kill);
extern int register_oom_notifier(struct notifier_block *nb);
extern int unregister_oom_notifier(struct notifier_block *nb);