memcg: fix leak of accounting at failure path of hugepage collapsing

[linux-flexiantxendom0-natty.git] / mm / huge_memory.c

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index b6c1ce3..e62ddb8 100644 (file)
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1852,7 +1852,6 @@ static void collapse_huge_page(struct mm_struct *mm,
                set_pmd_at(mm, address, pmd, _pmd);
                spin_unlock(&mm->page_table_lock);
                anon_vma_unlock(vma->anon_vma);
-               mem_cgroup_uncharge_page(new_page);
                goto out;
        }
 
@@ -1898,6 +1897,7 @@ out_up_write:
        return;
 
 out:
+       mem_cgroup_uncharge_page(new_page);
 #ifdef CONFIG_NUMA
        put_page(new_page);
 #endif