On Thu, 31 May 2012, David Rientjes wrote:

On Wed, 23 May 2012, Christoph Lameter wrote:

quoted

Add fields to the page struct so that it is properly documented that
slab overlays the lru fields.

This cleans up some casts in slab.

Sounds good, but...

quoted

Index: linux-2.6/include/linux/mm_types.h
===================================================================

--- linux-2.6.orig/include/linux/mm_types.h	2012-05-22 09:05:49.716464025 -0500
+++ linux-2.6/include/linux/mm_types.h	2012-05-22 09:21:28.532444572 -0500

@@ -90,6 +90,10 @@ struct page {
 				atomic_t _count;		/* Usage count, see below. */
 			};
 		};
+		struct {		/* SLAB */
+			struct kmem_cache *slab_cache;
+			struct slab *slab_page;
+		};
 	};

 	/* Third double word block */

The lru fields are in the third double word block.

Right. This slipped somehow into an earlier double word block. Next
patchset fixes that.

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