memcg: fix deadlock between lock_page_cgroup and mapping tree_lock

[sfrench/cifs-2.6.git] / mm / truncate.c

diff --git a/mm/truncate.c b/mm/truncate.c
index 55206fab7b994e18fb026ca36269e3feeb2705a1..12e1579f916546db1933998f4f655a8c1f8e2d34 100644 (file)
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -359,6 +359,7 @@ invalidate_complete_page2(struct address_space *mapping, struct page *page)
        BUG_ON(page_has_private(page));
        __remove_from_page_cache(page);
        spin_unlock_irq(&mapping->tree_lock);
+       mem_cgroup_uncharge_cache_page(page);
        page_cache_release(page);       /* pagecache ref */
        return 1;
 failed: