[PATCH] handle BIO allocation failures in swap_writepage()

If allocation of a BIO for swap writeout fails, mark the page dirty
again to save it from eviction.

diff --git a/mm/page_io.c b/mm/page_io.c
index 3692ead4d94cb04c4ea87b4de175f117c80a4f3d..b89925ee30ea3cd0e0ed969eaa10de7f9060cc10 100644 (file)
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -98,6 +98,7 @@ int swap_writepage(struct page *page)
        }
        bio = get_swap_bio(GFP_NOIO, page, end_swap_bio_write);
        if (bio == NULL) {
+               set_page_dirty(page);
                ret = -ENOMEM;
                goto out;
        }