mm/slub: fix missing ALLOC_SLOWPATH stat when bulk alloc

The ALLOC_SLOWPATH statistics is missing in bulk allocation now.  Fix it
by doing statistics in alloc slow path.

Signed-off-by: Abel Wu <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Reviewed-by: Pekka Enberg <[email protected]>
Acked-by: David Rientjes <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: Joonsoo Kim <[email protected]>
Cc: Hewenliang <[email protected]>
Cc: Hu Shiyuan <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Linus Torvalds <[email protected]>

Author: Abel Wu

mm/slub.c

@@ -2661,6 +2661,8 @@ static void *___slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node,
 	void *freelist;
 	struct page *page;
 
+	stat(s, ALLOC_SLOWPATH);
+
 	page = c->page;
 	if (!page) {
 		/*
@@ -2850,7 +2852,6 @@ static __always_inline void *slab_alloc_node(struct kmem_cache *s,
 	page = c->page;
 	if (unlikely(!object || !node_match(page, node))) {
 		object = __slab_alloc(s, gfpflags, node, addr, c);
-		stat(s, ALLOC_SLOWPATH);
 	} else {
 		void *next_object = get_freepointer_safe(s, object);