From: Christoph Lameter <clameter@sgi.com>

My test systems fails to obtain order 4 allocs after prolonged use.  So the
Antifragmentation patches are unable to guarantee order 4 blocks after a while
(straight compile, edit load).

Reduce the the max order if antifrag measures are detected to 3.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/slub.c |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

diff -puN mm/slub.c~slub-reduce-antifrag-max-order mm/slub.c
--- a/mm/slub.c~slub-reduce-antifrag-max-order
+++ a/mm/slub.c
@@ -176,7 +176,7 @@ static inline void ClearSlabDebug(struct
  * If antifragmentation methods are in effect then increase the
  * slab sizes to increase performance
  */
-#define DEFAULT_ANTIFRAG_MAX_ORDER 4
+#define DEFAULT_ANTIFRAG_MAX_ORDER PAGE_ALLOC_COSTLY_ORDER
 #define DEFAULT_ANTIFRAG_MIN_OBJECTS 16
 
 /*
_