From: Manfred Spraul <manfred@colorfullife.com>

The attached patch adds a simple kmem_cache_alloc_node function: allocate
memory on a given node.  The function is intended for cpu bound structures.
 It's used for alloc_percpu and for the slab-internal per-cpu structures.
Jack Steiner reported a ~3% performance increase for AIM7 on a 64-way
Itanium 2.

Port maintainers: The patch could cause problems if CPU_UP_PREPARE is
called for a cpu on a node before the corresponding memory is attached
and/or if alloc_pages_node doesn't fall back to memory from another node if
there is no memory in the requested node.  I think noone does that, but I'm
not sure.