bugfix for memory cgroup controller: migration under memory controller fix

[linux-2.6-omap-h63xx.git] / mm / migrate.c

diff --git a/mm/migrate.c b/mm/migrate.c
index 7637941446971fc9c31de48066926f944cd6f8d6..a73504ff5ab982007b2e0355e49f0dedcac65899 100644 (file)
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -593,9 +593,10 @@ static int move_to_new_page(struct page *newpage, struct page *page)
        else
                rc = fallback_migrate_page(mapping, newpage, page);
 
-       if (!rc)
+       if (!rc) {
+               mem_cgroup_page_migration(page, newpage);
                remove_migration_ptes(page, newpage);
-       else
+       } else
                newpage->mapping = NULL;
 
        unlock_page(newpage);
@@ -614,6 +615,7 @@ static int unmap_and_move(new_page_t get_new_page, unsigned long private,
        int *result = NULL;
        struct page *newpage = get_new_page(page, private, &result);
        int rcu_locked = 0;
+       int charge = 0;
 
        if (!newpage)
                return -ENOMEM;
@@ -673,14 +675,19 @@ static int unmap_and_move(new_page_t get_new_page, unsigned long private,
                goto rcu_unlock;
        }
 
+       charge = mem_cgroup_prepare_migration(page);
        /* Establish migration ptes or remove ptes */
        try_to_unmap(page, 1);
 
        if (!page_mapped(page))
                rc = move_to_new_page(newpage, page);
 
-       if (rc)
+       if (rc) {
                remove_migration_ptes(page, page);
+               if (charge)
+                       mem_cgroup_end_migration(page);
+       } else if (charge)
+               mem_cgroup_end_migration(newpage);
 rcu_unlock:
        if (rcu_locked)
                rcu_read_unlock();