memcontrol: move oom task exclusion to tasklist scan

[linux-2.6-omap-h63xx.git] / include / linux / memcontrol.h

diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 3f121b27677a870eebdbb85e9f886b1dee786447..42536c737d9c412be88aac0d3959f17e0622ff05 100644 (file)
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -3,6 +3,9 @@
  * Copyright IBM Corporation, 2007
  * Author Balbir Singh <balbir@linux.vnet.ibm.com>
  *
+ * Copyright 2007 OpenVZ SWsoft Inc
+ * Author: Pavel Emelianov <xemul@openvz.org>
+ *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or
@@ -17,5 +20,104 @@
 #ifndef _LINUX_MEMCONTROL_H
 #define _LINUX_MEMCONTROL_H
 
+#include <linux/rcupdate.h>
+#include <linux/mm.h>
+
+struct mem_cgroup;
+struct page_cgroup;
+struct page;
+struct mm_struct;
+
+#ifdef CONFIG_CGROUP_MEM_CONT
+
+extern void mm_init_cgroup(struct mm_struct *mm, struct task_struct *p);
+extern void mm_free_cgroup(struct mm_struct *mm);
+extern void page_assign_page_cgroup(struct page *page,
+                                       struct page_cgroup *pc);
+extern struct page_cgroup *page_get_page_cgroup(struct page *page);
+extern int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
+                               gfp_t gfp_mask);
+extern void mem_cgroup_uncharge(struct page_cgroup *pc);
+extern void mem_cgroup_move_lists(struct page_cgroup *pc, bool active);
+extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
+                                       struct list_head *dst,
+                                       unsigned long *scanned, int order,
+                                       int mode, struct zone *z,
+                                       struct mem_cgroup *mem_cont,
+                                       int active);
+extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
+extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
+                                       gfp_t gfp_mask);
+int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
+
+static inline struct mem_cgroup *mm_cgroup(const struct mm_struct *mm)
+{
+       return rcu_dereference(mm->mem_cgroup);
+}
+
+static inline void mem_cgroup_uncharge_page(struct page *page)
+{
+       mem_cgroup_uncharge(page_get_page_cgroup(page));
+}
+
+#else /* CONFIG_CGROUP_MEM_CONT */
+static inline void mm_init_cgroup(struct mm_struct *mm,
+                                       struct task_struct *p)
+{
+}
+
+static inline void mm_free_cgroup(struct mm_struct *mm)
+{
+}
+
+static inline void page_assign_page_cgroup(struct page *page,
+                                               struct page_cgroup *pc)
+{
+}
+
+static inline struct page_cgroup *page_get_page_cgroup(struct page *page)
+{
+       return NULL;
+}
+
+static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
+                                       gfp_t gfp_mask)
+{
+       return 0;
+}
+
+static inline void mem_cgroup_uncharge(struct page_cgroup *pc)
+{
+}
+
+static inline void mem_cgroup_uncharge_page(struct page *page)
+{
+}
+
+static inline void mem_cgroup_move_lists(struct page_cgroup *pc,
+                                               bool active)
+{
+}
+
+static inline int mem_cgroup_cache_charge(struct page *page,
+                                               struct mm_struct *mm,
+                                               gfp_t gfp_mask)
+{
+       return 0;
+}
+
+static inline struct mem_cgroup *mm_cgroup(const struct mm_struct *mm)
+{
+       return NULL;
+}
+
+static inline int task_in_mem_cgroup(struct task_struct *task,
+                                    const struct mem_cgroup *mem)
+{
+       return 1;
+}
+
+#endif /* CONFIG_CGROUP_MEM_CONT */
+
 #endif /* _LINUX_MEMCONTROL_H */