Memory controller: memory accounting
[linux-2.6.git] / mm / rmap.c
index 57ad276..4a34879 100644 (file)
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -48,6 +48,7 @@
 #include <linux/rcupdate.h>
 #include <linux/module.h>
 #include <linux/kallsyms.h>
+#include <linux/memcontrol.h>
 
 #include <asm/tlbflush.h>
 
@@ -554,8 +555,14 @@ void page_add_anon_rmap(struct page *page,
        VM_BUG_ON(address < vma->vm_start || address >= vma->vm_end);
        if (atomic_inc_and_test(&page->_mapcount))
                __page_set_anon_rmap(page, vma, address);
-       else
+       else {
                __page_check_anon_rmap(page, vma, address);
+               /*
+                * We unconditionally charged during prepare, we uncharge here
+                * This takes care of balancing the reference counts
+                */
+               mem_cgroup_uncharge_page(page);
+       }
 }
 
 /*
@@ -586,6 +593,12 @@ void page_add_file_rmap(struct page *page)
 {
        if (atomic_inc_and_test(&page->_mapcount))
                __inc_zone_page_state(page, NR_FILE_MAPPED);
+       else
+               /*
+                * We unconditionally charged during prepare, we uncharge here
+                * This takes care of balancing the reference counts
+                */
+               mem_cgroup_uncharge_page(page);
 }
 
 #ifdef CONFIG_DEBUG_VM
@@ -646,6 +659,8 @@ void page_remove_rmap(struct page *page, struct vm_area_struct *vma)
                        page_clear_dirty(page);
                        set_page_dirty(page);
                }
+               mem_cgroup_uncharge_page(page);
+
                __dec_zone_page_state(page,
                                PageAnon(page) ? NR_ANON_PAGES : NR_FILE_MAPPED);
        }