3 files changed, 63 insertions, 29 deletions

diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index fdf3967e1397..a6ac0d491fe6 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -69,10 +69,8 @@ extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
 extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
                                                         int priority);
 
-extern long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem,
-                                struct zone *zone, int priority);
-extern long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem,
-                                struct zone *zone, int priority);
+extern long mem_cgroup_calc_reclaim(struct mem_cgroup *mem, struct zone *zone,
+                                        int priority, enum lru_list lru);
 
 #else /* CONFIG_CGROUP_MEM_RES_CTLR */
 static inline void page_reset_bad_cgroup(struct page *page)
@@ -159,14 +157,9 @@ static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
 {
 }
 
-static inline long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem,
-                                        struct zone *zone, int priority)
-{
-        return 0;
-}
-
-static inline long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem,
-                                        struct zone *zone, int priority)
+static inline long mem_cgroup_calc_reclaim(struct mem_cgroup *mem,
+                                        struct zone *zone, int priority,
+                                        enum lru_list lru)
 {
         return 0;
 }
diff --git a/include/linux/mm_inline.h b/include/linux/mm_inline.h
index 895bc4e93039..2704729777ef 100644
--- a/include/linux/mm_inline.h
+++ b/include/linux/mm_inline.h
@@ -1,40 +1,67 @@
 static inline void
+add_page_to_lru_list(struct zone *zone, struct page *page, enum lru_list l)
+{
+        list_add(&page->lru, &zone->lru[l].list);
+        __inc_zone_state(zone, NR_LRU_BASE + l);
+}
+
+static inline void
+del_page_from_lru_list(struct zone *zone, struct page *page, enum lru_list l)
+{
+        list_del(&page->lru);
+        __dec_zone_state(zone, NR_LRU_BASE + l);
+}
+
+static inline void
 add_page_to_active_list(struct zone *zone, struct page *page)
 {
-        list_add(&page->lru, &zone->active_list);
-        __inc_zone_state(zone, NR_ACTIVE);
+        add_page_to_lru_list(zone, page, LRU_ACTIVE);
 }
 
 static inline void
 add_page_to_inactive_list(struct zone *zone, struct page *page)
 {
-        list_add(&page->lru, &zone->inactive_list);
-        __inc_zone_state(zone, NR_INACTIVE);
+        add_page_to_lru_list(zone, page, LRU_INACTIVE);
 }
 
 static inline void
 del_page_from_active_list(struct zone *zone, struct page *page)
 {
-        list_del(&page->lru);
-        __dec_zone_state(zone, NR_ACTIVE);
+        del_page_from_lru_list(zone, page, LRU_ACTIVE);
 }
 
 static inline void
 del_page_from_inactive_list(struct zone *zone, struct page *page)
 {
-        list_del(&page->lru);
-        __dec_zone_state(zone, NR_INACTIVE);
+        del_page_from_lru_list(zone, page, LRU_INACTIVE);
 }
 
 static inline void
 del_page_from_lru(struct zone *zone, struct page *page)
 {
+        enum lru_list l = LRU_INACTIVE;
+
         list_del(&page->lru);
         if (PageActive(page)) {
                 __ClearPageActive(page);
-                __dec_zone_state(zone, NR_ACTIVE);
-        } else {
-                __dec_zone_state(zone, NR_INACTIVE);
+                l = LRU_ACTIVE;
         }
+        __dec_zone_state(zone, NR_LRU_BASE + l);
 }
 
+/**
+ * page_lru - which LRU list should a page be on?
+ * @page: the page to test
+ *
+ * Returns the LRU list a page should be on, as an index
+ * into the array of LRU lists.
+ */
+static inline enum lru_list page_lru(struct page *page)
+{
+        enum lru_list lru = LRU_BASE;
+
+        if (PageActive(page))
+                lru += LRU_ACTIVE;
+
+        return lru;
+}
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 428328a05fa1..156e18f3919b 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -81,8 +81,9 @@ struct zone_padding {
 enum zone_stat_item {
         /* First 128 byte cacheline (assuming 64 bit words) */
         NR_FREE_PAGES,
-        NR_INACTIVE,
-        NR_ACTIVE,
+        NR_LRU_BASE,
+        NR_INACTIVE = NR_LRU_BASE, /* must match order of LRU_[IN]ACTIVE */
+        NR_ACTIVE,      /*  "     "     "   "       "         */
         NR_ANON_PAGES,  /* Mapped anonymous pages */
         NR_FILE_MAPPED, /* pagecache pages mapped into pagetables.
                            only modified from process context */
@@ -107,6 +108,19 @@ enum zone_stat_item {
 #endif
         NR_VM_ZONE_STAT_ITEMS };
 
+enum lru_list {
+        LRU_BASE,
+        LRU_INACTIVE=LRU_BASE,  /* must match order of NR_[IN]ACTIVE */
+        LRU_ACTIVE,             /*  "     "     "   "       "        */
+        NR_LRU_LISTS };
+
+#define for_each_lru(l) for (l = 0; l < NR_LRU_LISTS; l++)
+
+static inline int is_active_lru(enum lru_list l)
+{
+        return (l == LRU_ACTIVE);
+}
+
 struct per_cpu_pages {
         int count;              /* number of pages in the list */
         int high;               /* high watermark, emptying needed */
@@ -251,10 +265,10 @@ struct zone {
 
         /* Fields commonly accessed by the page reclaim scanner */
         spinlock_t              lru_lock;       
-        struct list_head        active_list;
-        struct list_head        inactive_list;
-        unsigned long           nr_scan_active;
-        unsigned long           nr_scan_inactive;
+        struct {
+                struct list_head list;
+                unsigned long nr_scan;
+        } lru[NR_LRU_LISTS];
         unsigned long           pages_scanned;     /* since last reclaim */
         unsigned long           flags;             /* zone flags, see below */