netfilter: nf_conntrack: pass template to l4proto ->error() handler

[safe/jmp/linux-2.6] / include / linux / mm_inline.h

diff --git a/include/linux/mm_inline.h b/include/linux/mm_inline.h
index 2704729..8835b87 100644 (file)
--- a/include/linux/mm_inline.h
+++ b/include/linux/mm_inline.h
@@ -1,8 +1,30 @@
+#ifndef LINUX_MM_INLINE_H
+#define LINUX_MM_INLINE_H
+
+/**
+ * page_is_file_cache - should the page be on a file LRU or anon LRU?
+ * @page: the page to test
+ *
+ * Returns 1 if @page is page cache page backed by a regular filesystem,
+ * or 0 if @page is anonymous, tmpfs or otherwise ram or swap backed.
+ * Used by functions that manipulate the LRU lists, to sort a page
+ * onto the right LRU list.
+ *
+ * We would like to get this info without a page flag, but the state
+ * needs to survive until the page is last deleted from the LRU, which
+ * could be as far down as __page_cache_release.
+ */
+static inline int page_is_file_cache(struct page *page)
+{
+       return !PageSwapBacked(page);
+}
+
 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);
+       mem_cgroup_add_lru_list(page, l);
 }
 
 static inline void
@@ -10,43 +32,42 @@ 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);
+       mem_cgroup_del_lru_list(page, l);
 }
 
-static inline void
-add_page_to_active_list(struct zone *zone, struct page *page)
-{
-       add_page_to_lru_list(zone, page, LRU_ACTIVE);
-}
-
-static inline void
-add_page_to_inactive_list(struct zone *zone, struct page *page)
-{
-       add_page_to_lru_list(zone, page, LRU_INACTIVE);
-}
-
-static inline void
-del_page_from_active_list(struct zone *zone, struct page *page)
-{
-       del_page_from_lru_list(zone, page, LRU_ACTIVE);
-}
-
-static inline void
-del_page_from_inactive_list(struct zone *zone, struct page *page)
+/**
+ * page_lru_base_type - which LRU list type should a page be on?
+ * @page: the page to test
+ *
+ * Used for LRU list index arithmetic.
+ *
+ * Returns the base LRU type - file or anon - @page should be on.
+ */
+static inline enum lru_list page_lru_base_type(struct page *page)
 {
-       del_page_from_lru_list(zone, page, LRU_INACTIVE);
+       if (page_is_file_cache(page))
+               return LRU_INACTIVE_FILE;
+       return LRU_INACTIVE_ANON;
 }
 
 static inline void
 del_page_from_lru(struct zone *zone, struct page *page)
 {
-       enum lru_list l = LRU_INACTIVE;
+       enum lru_list l;
 
        list_del(&page->lru);
-       if (PageActive(page)) {
-               __ClearPageActive(page);
-               l = LRU_ACTIVE;
+       if (PageUnevictable(page)) {
+               __ClearPageUnevictable(page);
+               l = LRU_UNEVICTABLE;
+       } else {
+               l = page_lru_base_type(page);
+               if (PageActive(page)) {
+                       __ClearPageActive(page);
+                       l += LRU_ACTIVE;
+               }
        }
        __dec_zone_state(zone, NR_LRU_BASE + l);
+       mem_cgroup_del_lru_list(page, l);
 }
 
 /**
@@ -58,10 +79,17 @@ del_page_from_lru(struct zone *zone, struct page *page)
  */
 static inline enum lru_list page_lru(struct page *page)
 {
-       enum lru_list lru = LRU_BASE;
+       enum lru_list lru;
 
-       if (PageActive(page))
-               lru += LRU_ACTIVE;
+       if (PageUnevictable(page))
+               lru = LRU_UNEVICTABLE;
+       else {
+               lru = page_lru_base_type(page);
+               if (PageActive(page))
+                       lru += LRU_ACTIVE;
+       }
 
        return lru;
 }
+
+#endif