[PATCH 2/2] swap: free allocated page if swap_read fails

[Minchan Kim]

swap_readpage could fails by -ENOMEM. In this case, we should free
allocated page instantly. There is no reason to retry.

Signed-off-by: Minchan Kim <minchan@xxxxxxxxxx>
---
 mm/memory.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mm/memory.c b/mm/memory.c
index 7206a634270b..8a5e304ffd91 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2943,7 +2943,8 @@ int do_swap_page(struct vm_fault *vmf)
 				__SetPageSwapBacked(page);
 				set_page_private(page, entry.val);
 				lru_cache_add_anon(page);
-				swap_readpage(page, true);
+				if (swap_readpage(page, true))
+					goto out_page;
 			}
 		} else {
 			page = swapin_readahead(entry, GFP_HIGHUSER_MOVABLE,
-- 
2.18.0.345.g5c9ce644c3-goog


--tThc/1wpZn/ma/RB--