slab: fix starting index for finding another object

In array cache, there is a object at index 0, check it.

Signed-off-by: Joonsoo Kim <js1304@gmail.com>
Signed-off-by: Mel Gorman <mgorman@suse.de>
Cc: David Miller <davem@davemloft.net>
Cc: Chuck Lever <chuck.lever@oracle.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/slab.c b/mm/slab.c
index d34a903..c685475 100644 (file)
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -983,7 +983,7 @@ static void *__ac_get_obj(struct kmem_cache *cachep, struct array_cache *ac,
                }
 
                /* The caller cannot use PFMEMALLOC objects, find another one */
-               for (i = 1; i < ac->avail; i++) {
+               for (i = 0; i < ac->avail; i++) {
                        /* If a !PFMEMALLOC object is found, swap them */
                        if (!is_obj_pfmemalloc(ac->entry[i])) {
                                objp = ac->entry[i];