Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / linux / oom.h

diff --git a/kernel/include/linux/oom.h b/kernel/include/linux/oom.h
new file mode 100644 (file)
index 0000000..44b2f6f
--- /dev/null
+++ b/kernel/include/linux/oom.h
@@ -0,0 +1,102 @@
+#ifndef __INCLUDE_LINUX_OOM_H
+#define __INCLUDE_LINUX_OOM_H
+
+
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <linux/nodemask.h>
+#include <uapi/linux/oom.h>
+
+struct zonelist;
+struct notifier_block;
+struct mem_cgroup;
+struct task_struct;
+
+/*
+ * Types of limitations to the nodes from which allocations may occur
+ */
+enum oom_constraint {
+       CONSTRAINT_NONE,
+       CONSTRAINT_CPUSET,
+       CONSTRAINT_MEMORY_POLICY,
+       CONSTRAINT_MEMCG,
+};
+
+enum oom_scan_t {
+       OOM_SCAN_OK,            /* scan thread and find its badness */
+       OOM_SCAN_CONTINUE,      /* do not consider thread for oom kill */
+       OOM_SCAN_ABORT,         /* abort the iteration and return */
+       OOM_SCAN_SELECT,        /* always select this thread first */
+};
+
+/* Thread is the potential origin of an oom condition; kill first on oom */
+#define OOM_FLAG_ORIGIN                ((__force oom_flags_t)0x1)
+
+static inline void set_current_oom_origin(void)
+{
+       current->signal->oom_flags |= OOM_FLAG_ORIGIN;
+}
+
+static inline void clear_current_oom_origin(void)
+{
+       current->signal->oom_flags &= ~OOM_FLAG_ORIGIN;
+}
+
+static inline bool oom_task_origin(const struct task_struct *p)
+{
+       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 unsigned long oom_badness(struct task_struct *p,
+               struct mem_cgroup *memcg, const nodemask_t *nodemask,
+               unsigned long totalpages);
+
+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,
+                            unsigned int points, unsigned long totalpages,
+                            struct mem_cgroup *memcg, nodemask_t *nodemask,
+                            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,
+                              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 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);
+
+extern bool oom_killer_disabled;
+extern bool oom_killer_disable(void);
+extern void oom_killer_enable(void);
+
+extern struct task_struct *find_lock_task_mm(struct task_struct *p);
+
+static inline bool task_will_free_mem(struct task_struct *task)
+{
+       /*
+        * 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);
+}
+
+/* sysctls */
+extern int sysctl_oom_dump_tasks;
+extern int sysctl_oom_kill_allocating_task;
+extern int sysctl_panic_on_oom;
+#endif /* _INCLUDE_LINUX_OOM_H */