slub: Determine gfpflags once and not every time a slab is allocated

Currently we determine the gfp flags to pass to the page allocator
each time a slab is being allocated.

Determine the bits to be set at the time the slab is created. Store
in a new allocflags field and add the flags in allocate_slab().

Acked-by: Mel Gorman <mel@csn.ul.ie>
Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Christoph Lameter <clameter@sgi.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h
index a849c472b845..98be113cf935 100644
--- a/include/linux/slub_def.h
+++ b/include/linux/slub_def.h
@@ -71,6 +71,7 @@ struct kmem_cache {
 
         /* Allocation and freeing of slabs */
         int objects;            /* Number of objects in slab */
+        gfp_t allocflags;       /* gfp flags to use on each alloc */
         int refcount;           /* Refcount for slab cache destroy */
         void (*ctor)(struct kmem_cache *, void *);
         int inuse;              /* Offset to metadata */