Merge commit 'v2.6.29-rc1' into timers/urgent

1 files changed, 136 insertions, 18 deletions

diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 1fbe14d39521..326f45c86530 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -19,22 +19,45 @@
 
 #ifndef _LINUX_MEMCONTROL_H
 #define _LINUX_MEMCONTROL_H
-
+#include <linux/cgroup.h>
 struct mem_cgroup;
 struct page_cgroup;
 struct page;
 struct mm_struct;
 
 #ifdef CONFIG_CGROUP_MEM_RES_CTLR
+/*
+ * All "charge" functions with gfp_mask should use GFP_KERNEL or
+ * (gfp_mask & GFP_RECLAIM_MASK). In current implementatin, memcg doesn't
+ * alloc memory but reclaims memory from all available zones. So, "where I want
+ * memory from" bits of gfp_mask has no meaning. So any bits of that field is
+ * available but adding a rule is better. charge functions' gfp_mask should
+ * be set to GFP_KERNEL or gfp_mask & GFP_RECLAIM_MASK for avoiding ambiguous
+ * codes.
+ * (Of course, if memcg does memory allocation in future, GFP_KERNEL is sane.)
+ */
 
-extern int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
+extern int mem_cgroup_newpage_charge(struct page *page, struct mm_struct *mm,
                                 gfp_t gfp_mask);
+/* for swap handling */
+extern int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
+                struct page *page, gfp_t mask, struct mem_cgroup **ptr);
+extern void mem_cgroup_commit_charge_swapin(struct page *page,
+                                        struct mem_cgroup *ptr);
+extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr);
+
 extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
                                         gfp_t gfp_mask);
-extern void mem_cgroup_move_lists(struct page *page, enum lru_list lru);
+extern void mem_cgroup_add_lru_list(struct page *page, enum lru_list lru);
+extern void mem_cgroup_del_lru_list(struct page *page, enum lru_list lru);
+extern void mem_cgroup_rotate_lru_list(struct page *page, enum lru_list lru);
+extern void mem_cgroup_del_lru(struct page *page);
+extern void mem_cgroup_move_lists(struct page *page,
+                                  enum lru_list from, enum lru_list to);
 extern void mem_cgroup_uncharge_page(struct page *page);
 extern void mem_cgroup_uncharge_cache_page(struct page *page);
-extern int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask);
+extern int mem_cgroup_shrink_usage(struct page *page,
+                        struct mm_struct *mm, gfp_t gfp_mask);
 
 extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
                                         struct list_head *dst,
@@ -47,12 +70,20 @@ int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
 
 extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
 
-#define mm_match_cgroup(mm, cgroup)     \
-        ((cgroup) == mem_cgroup_from_task((mm)->owner))
+static inline
+int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup)
+{
+        struct mem_cgroup *mem;
+        rcu_read_lock();
+        mem = mem_cgroup_from_task((mm)->owner);
+        rcu_read_unlock();
+        return cgroup == mem;
+}
 
 extern int
-mem_cgroup_prepare_migration(struct page *page, struct page *newpage);
-extern void mem_cgroup_end_migration(struct page *page);
+mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr);
+extern void mem_cgroup_end_migration(struct mem_cgroup *mem,
+        struct page *oldpage, struct page *newpage);
 
 /*
  * For memory reclaim.
@@ -65,13 +96,32 @@ extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
                                                         int priority);
 extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
                                                         int priority);
+int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg);
+unsigned long mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg,
+                                       struct zone *zone,
+                                       enum lru_list lru);
+struct zone_reclaim_stat *mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg,
+                                                      struct zone *zone);
+struct zone_reclaim_stat*
+mem_cgroup_get_reclaim_stat_from_page(struct page *page);
 
-extern long mem_cgroup_calc_reclaim(struct mem_cgroup *mem, struct zone *zone,
-                                        int priority, enum lru_list lru);
+#ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
+extern int do_swap_account;
+#endif
 
+static inline bool mem_cgroup_disabled(void)
+{
+        if (mem_cgroup_subsys.disabled)
+                return true;
+        return false;
+}
+
+extern bool mem_cgroup_oom_called(struct task_struct *task);
 
 #else /* CONFIG_CGROUP_MEM_RES_CTLR */
-static inline int mem_cgroup_charge(struct page *page,
+struct mem_cgroup;
+
+static inline int mem_cgroup_newpage_charge(struct page *page,
                                         struct mm_struct *mm, gfp_t gfp_mask)
 {
         return 0;
@@ -83,6 +133,21 @@ static inline int mem_cgroup_cache_charge(struct page *page,
         return 0;
 }
 
+static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
+                struct page *page, gfp_t gfp_mask, struct mem_cgroup **ptr)
+{
+        return 0;
+}
+
+static inline void mem_cgroup_commit_charge_swapin(struct page *page,
+                                          struct mem_cgroup *ptr)
+{
+}
+
+static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr)
+{
+}
+
 static inline void mem_cgroup_uncharge_page(struct page *page)
 {
 }
@@ -91,12 +156,33 @@ static inline void mem_cgroup_uncharge_cache_page(struct page *page)
 {
 }
 
-static inline int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask)
+static inline int mem_cgroup_shrink_usage(struct page *page,
+                        struct mm_struct *mm, gfp_t gfp_mask)
 {
         return 0;
 }
 
-static inline void mem_cgroup_move_lists(struct page *page, bool active)
+static inline void mem_cgroup_add_lru_list(struct page *page, int lru)
+{
+}
+
+static inline void mem_cgroup_del_lru_list(struct page *page, int lru)
+{
+        return ;
+}
+
+static inline void mem_cgroup_rotate_lru_list(struct page *page, int lru)
+{
+        return ;
+}
+
+static inline void mem_cgroup_del_lru(struct page *page)
+{
+        return ;
+}
+
+static inline void
+mem_cgroup_move_lists(struct page *page, enum lru_list from, enum lru_list to)
 {
 }
 
@@ -112,12 +198,14 @@ static inline int task_in_mem_cgroup(struct task_struct *task,
 }
 
 static inline int
-mem_cgroup_prepare_migration(struct page *page, struct page *newpage)
+mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr)
 {
         return 0;
 }
 
-static inline void mem_cgroup_end_migration(struct page *page)
+static inline void mem_cgroup_end_migration(struct mem_cgroup *mem,
+                                        struct page *oldpage,
+                                        struct page *newpage)
 {
 }
 
@@ -146,12 +234,42 @@ static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
 {
 }
 
-static inline long mem_cgroup_calc_reclaim(struct mem_cgroup *mem,
-                                        struct zone *zone, int priority,
-                                        enum lru_list lru)
+static inline bool mem_cgroup_disabled(void)
+{
+        return true;
+}
+
+static inline bool mem_cgroup_oom_called(struct task_struct *task)
+{
+        return false;
+}
+
+static inline int
+mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg)
+{
+        return 1;
+}
+
+static inline unsigned long
+mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg, struct zone *zone,
+                         enum lru_list lru)
 {
         return 0;
 }
+
+
+static inline struct zone_reclaim_stat*
+mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, struct zone *zone)
+{
+        return NULL;
+}
+
+static inline struct zone_reclaim_stat*
+mem_cgroup_get_reclaim_stat_from_page(struct page *page)
+{
+        return NULL;
+}
+
 #endif /* CONFIG_CGROUP_MEM_CONT */
 
 #endif /* _LINUX_MEMCONTROL_H */