slub: Simplify any_slab_object checks

Since we now have total_objects counter per node use that to
check for the presence of any objects. The loop over all cpu slabs
is not that useful since any cpu slab would require an object allocation
first. So drop that.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>

diff --git a/mm/slub.c b/mm/slub.c
index 23a2683d6c9f3ec7a68a48326567d04808d4b5c1..06533f342be0e4bf86abe1ca3f1b2c5539bead8a 100644 (file)
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -3775,14 +3775,6 @@ static ssize_t show_slab_objects(struct kmem_cache *s,
 static int any_slab_objects(struct kmem_cache *s)
 {
        int node;
-       int cpu;
-
-       for_each_possible_cpu(cpu) {
-               struct kmem_cache_cpu *c = get_cpu_slab(s, cpu);
-
-               if (c && c->page)
-                       return 1;
-       }
 
        for_each_online_node(node) {
                struct kmem_cache_node *n = get_node(s, node);
@@ -3790,7 +3782,7 @@ static int any_slab_objects(struct kmem_cache *s)
                if (!n)
                        continue;
 
-               if (n->nr_partial || atomic_long_read(&n->nr_slabs))
+               if (atomic_read(&n->total_objects))
                        return 1;
        }
        return 0;