mm: oom analysis: add shmem vmstat

[linux-2.6-block.git] / mm / migrate.c

diff --git a/mm/migrate.c b/mm/migrate.c
index 939888f9ddab21ecabdc2f732a8ee604cb56da13..37143b924484438b82af273e6b62cf4f587d74be 100644 (file)
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -147,7 +147,7 @@ out:
 static void remove_file_migration_ptes(struct page *old, struct page *new)
 {
        struct vm_area_struct *vma;
-       struct address_space *mapping = page_mapping(new);
+       struct address_space *mapping = new->mapping;
        struct prio_tree_iter iter;
        pgoff_t pgoff = new->index << (PAGE_CACHE_SHIFT - PAGE_SHIFT);
 
@@ -312,7 +312,10 @@ static int migrate_page_move_mapping(struct address_space *mapping,
         */
        __dec_zone_page_state(page, NR_FILE_PAGES);
        __inc_zone_page_state(newpage, NR_FILE_PAGES);
-
+       if (PageSwapBacked(page)) {
+               __dec_zone_page_state(page, NR_SHMEM);
+               __inc_zone_page_state(newpage, NR_SHMEM);
+       }
        spin_unlock_irq(&mapping->tree_lock);
 
        return 0;
@@ -664,13 +667,15 @@ static int unmap_and_move(new_page_t get_new_page, unsigned long private,
                         *    needs to be effective.
                         */
                        try_to_free_buffers(page);
+                       goto rcu_unlock;
                }
-               goto rcu_unlock;
+               goto skip_unmap;
        }
 
        /* Establish migration ptes or remove ptes */
        try_to_unmap(page, 1);
 
+skip_unmap:
        if (!page_mapped(page))
                rc = move_to_new_page(newpage, page);