1 files changed, 7 insertions, 0 deletions

diff --git a/mm/swapfile.c b/mm/swapfile.c
index f1e69c30d203..9678182e0eef 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -646,6 +646,7 @@ static int try_to_unuse(unsigned int type)
                  */
                 swap_map = &si->swap_map[i];
                 entry = swp_entry(type, i);
+again:
                 page = read_swap_cache_async(entry, NULL, 0);
                 if (!page) {
                         /*
@@ -680,6 +681,12 @@ static int try_to_unuse(unsigned int type)
                 wait_on_page_locked(page);
                 wait_on_page_writeback(page);
                 lock_page(page);
+                if (!PageSwapCache(page)) {
+                        /* Page migration has occured */
+                        unlock_page(page);
+                        page_cache_release(page);
+                        goto again;
+                }
                 wait_on_page_writeback(page);
 
                 /*