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authorChristoph Lameter <clameter@sgi.com>2008-04-14 19:11:30 +0300
committerPekka Enberg <penberg@cs.helsinki.fi>2008-04-27 18:28:16 +0300
commit39b264641a0c3b5e0e742e2046b49e92d1f3be88 (patch)
tree1b7059ec5a0e498254f516c1be11b525d43af3c8 /include
parent33b12c38134e95e5afa73214af6f49abd7b8418e (diff)
slub: Store max number of objects in the page struct.
Split the inuse field up to be able to store the number of objects in this page in the page struct as well. Necessary if we want to have pages of various orders for a slab. Also avoids touching struct kmem_cache cachelines in __slab_alloc(). Update diagnostic code to check the number of objects and make sure that the number of objects always stays within the bounds of a 16 bit unsigned integer. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Diffstat (limited to 'include')
-rw-r--r--include/linux/mm_types.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index af190ceab97..e0bd2235296 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -42,7 +42,10 @@ struct page {
* to show when page is mapped
* & limit reverse map searches.
*/
- unsigned int inuse; /* SLUB: Nr of objects */
+ struct { /* SLUB */
+ u16 inuse;
+ u16 objects;
+ };
};
union {
struct {