fiq_debugger: merge from linux 3.10

[firefly-linux-kernel-4.4.55.git] / include / linux / oom.h

diff --git a/include/linux/oom.h b/include/linux/oom.h
index da60007075b509b864d386b3d9092c77aec97c64..03e6257321f0353efcf6d134744af6f597e78a8b 100644 (file)
--- a/include/linux/oom.h
+++ b/include/linux/oom.h
@@ -12,6 +12,27 @@ struct notifier_block;
 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
  */
@@ -32,6 +53,8 @@ enum oom_scan_t {
 /* 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;
@@ -47,43 +70,49 @@ static inline bool oom_task_origin(const struct task_struct *p)
        return !!(p->signal->oom_flags & OOM_FLAG_ORIGIN);
 }
 
+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,
                unsigned long totalpages);
-extern void oom_kill_process(struct task_struct *p, gfp_t gfp_mask, int order,
+
+extern int oom_kills_count(void);
+extern void note_oom_kill(void);
+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 int try_set_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags);
-extern void clear_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags);
+extern void check_panic_on_oom(struct oom_control *oc,
+                              enum oom_constraint constraint,
+                              struct mem_cgroup *memcg);
 
-extern void check_panic_on_oom(enum oom_constraint constraint, gfp_t gfp_mask,
-                              int order, const nodemask_t *nodemask);
+extern enum oom_scan_t oom_scan_process_thread(struct oom_control *oc,
+               struct task_struct *task, unsigned long totalpages);
 
-extern enum oom_scan_t oom_scan_process_thread(struct task_struct *task,
-               unsigned long totalpages, const nodemask_t *nodemask,
-               bool force_kill);
+extern bool out_of_memory(struct oom_control *oc);
+
+extern void exit_oom_victim(void);
 
-extern void 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);
 
 extern bool oom_killer_disabled;
+extern bool oom_killer_disable(void);
+extern void oom_killer_enable(void);
 
-static inline void oom_killer_disable(void)
-{
-       oom_killer_disabled = true;
-}
+extern struct task_struct *find_lock_task_mm(struct task_struct *p);
 
-static inline void oom_killer_enable(void)
+static inline bool task_will_free_mem(struct task_struct *task)
 {
-       oom_killer_disabled = false;
+       /*
+        * A coredumping process may sleep for an extended period in exit_mm(),
+        * so the oom killer cannot assume that the process will promptly exit
+        * and release memory.
+        */
+       return (task->flags & PF_EXITING) &&
+               !(task->signal->flags & SIGNAL_GROUP_COREDUMP);
 }
 
-extern struct task_struct *find_lock_task_mm(struct task_struct *p);
-
 /* sysctls */
 extern int sysctl_oom_dump_tasks;
 extern int sysctl_oom_kill_allocating_task;