mm/slub: remove unused kmem_cache_order_objects max

max field holds the largest slab order that was ever used for a slab cache.
But it's unused now. Remove it.

Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Link: https://lore.kernel.org/r/20220429090545.33413-1-linmiaohe@huawei.com

diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h
index 33c5c0e..f9c68a9 100644 (file)
--- a/include/linux/slub_def.h
+++ b/include/linux/slub_def.h
@@ -105,7 +105,6 @@ struct kmem_cache {
        struct kmem_cache_order_objects oo;
 
        /* Allocation and freeing of slabs */
-       struct kmem_cache_order_objects max;
        struct kmem_cache_order_objects min;
        gfp_t allocflags;       /* gfp flags to use on each alloc */
        int refcount;           /* Refcount for slab cache destroy */

diff --git a/mm/slub.c b/mm/slub.c
index 74d92aa..547b516 100644 (file)
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -4165,8 +4165,6 @@ static int calculate_sizes(struct kmem_cache *s)
         */
        s->oo = oo_make(order, size);
        s->min = oo_make(get_order(size), size);
-       if (oo_objects(s->oo) > oo_objects(s->max))
-               s->max = s->oo;
 
        return !!oo_objects(s->oo);
 }