slub: Move node determination out of hotpath

If the node does not change then there is no need to recalculate
the node from the page struct. So move the node determination
into the places where we acquire a new slab page.
Signed-off-by: NChristoph Lameter <cl@linux.com>
Signed-off-by: NPekka Enberg <penberg@kernel.org>

mm/slub.c

@@ -1828,7 +1828,6 @@ static void *__slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node,
 	c->freelist = get_freepointer(s, object);
 	page->inuse = page->objects;
 	page->freelist = NULL;
-	c->node = page_to_nid(page);
 
 unlock_out:
 	slab_unlock(page);
@@ -1845,8 +1844,10 @@ static void *__slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node,
 new_slab:
 	page = get_partial(s, gfpflags, node);
 	if (page) {
-		c->page = page;
 		stat(s, ALLOC_FROM_PARTIAL);
+load_from_page:
+		c->node = page_to_nid(page);
+		c->page = page;
 		goto load_freelist;
 	}
 
@@ -1867,8 +1868,8 @@ static void *__slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node,
 
 		slab_lock(page);
 		__SetPageSlubFrozen(page);
-		c->page = page;
-		goto load_freelist;
+
+		goto load_from_page;
 	}
 	if (!(gfpflags & __GFP_NOWARN) && printk_ratelimit())
 		slab_out_of_memory(s, gfpflags, node);