slab: rename slab_break_gfp_order to slab_max_order

slab_break_gfp_order is more appropriately named slab_max_order since it
enforces the maximum order size of slabs as long as a single object will
still fit.

Also rename BREAK_GFP_ORDER_{LO,HI} accordingly.

Acked-by: Christoph Lameter <cl@linux.com>
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

diff --git a/mm/slab.c b/mm/slab.c
index 708efe8..1a482e8 100644 (file)
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -481,9 +481,9 @@ EXPORT_SYMBOL(slab_buffer_size);
 /*
  * Do not go above this order unless 0 objects fit into the slab.
  */
-#define        BREAK_GFP_ORDER_HI      1
-#define        BREAK_GFP_ORDER_LO      0
-static int slab_break_gfp_order = BREAK_GFP_ORDER_LO;
+#define        SLAB_MAX_ORDER_HI       1
+#define        SLAB_MAX_ORDER_LO       0
+static int slab_max_order = SLAB_MAX_ORDER_LO;
 
 /*
  * Functions for storing/retrieving the cachep and or slab from the page
@@ -1502,7 +1502,7 @@ void __init kmem_cache_init(void)
         * page orders on machines with more than 32MB of memory.
         */
        if (totalram_pages > (32 << 20) >> PAGE_SHIFT)
-               slab_break_gfp_order = BREAK_GFP_ORDER_HI;
+               slab_max_order = SLAB_MAX_ORDER_HI;
 
        /* Bootstrap is tricky, because several objects are allocated
         * from caches that do not exist yet:
@@ -2112,7 +2112,7 @@ static size_t calculate_slab_order(struct kmem_cache *cachep,
                 * Large number of objects is good, but very large slabs are
                 * currently bad for the gfp()s.
                 */
-               if (gfporder >= slab_break_gfp_order)
+               if (gfporder >= slab_max_order)
                        break;
 
                /*