slub: Calculate min_objects based on number of processors.

[linux-2.6-omap-h63xx.git] / mm / slub.c

diff --git a/mm/slub.c b/mm/slub.c
index 06533f342be0e4bf86abe1ca3f1b2c5539bead8a..e2e6ba7a5172ea93c588089f14b59db14ab8a890 100644 (file)
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -149,25 +149,6 @@ static inline void ClearSlabDebug(struct page *page)
 /* Enable to test recovery from slab corruption on boot */
 #undef SLUB_RESILIENCY_TEST
 
-#if PAGE_SHIFT <= 12
-
-/*
- * Small page size. Make sure that we do not fragment memory
- */
-#define DEFAULT_MAX_ORDER 1
-#define DEFAULT_MIN_OBJECTS 4
-
-#else
-
-/*
- * Large page machines are customarily able to handle larger
- * page orders.
- */
-#define DEFAULT_MAX_ORDER 2
-#define DEFAULT_MIN_OBJECTS 8
-
-#endif
-
 /*
  * Mininum number of partial slabs. These will be left on the partial
  * lists even if they are empty. kmem_cache_shrink may reclaim them.
@@ -1821,8 +1802,8 @@ static struct page *get_object_page(const void *x)
  * take the list_lock.
  */
 static int slub_min_order;
-static int slub_max_order = DEFAULT_MAX_ORDER;
-static int slub_min_objects = DEFAULT_MIN_OBJECTS;
+static int slub_max_order = PAGE_ALLOC_COSTLY_ORDER;
+static int slub_min_objects;
 
 /*
  * Merge control. If this is set then no merging of slab caches will occur.
@@ -1899,6 +1880,8 @@ static inline int calculate_order(int size)
         * we reduce the minimum objects required in a slab.
         */
        min_objects = slub_min_objects;
+       if (!min_objects)
+               min_objects = 4 * (fls(nr_cpu_ids) + 1);
        while (min_objects > 1) {
                fraction = 8;
                while (fraction >= 4) {