Hi Andrew,

attached is a patch that fixes the fragmentation that Badri noticed with 
kmem_cache_alloc_node. Could you add it to the mm tree? The patch is 
against 2.6.9-rc3-mm3.

Description:
kmem_cache_alloc_node tries to allocate memory from a given node. The 
current implementation contains two bugs:
- the node aware code was used even for !CONFIG_NUMA systems. Fix: 
inline function that redefines kmem_cache_alloc_node as kmem_cache_alloc 
for !CONFIG_NUMA.
- the code always allocated a new slab for each new allocation. This 
caused severe fragmentation. Fix: walk the slabp lists and search for a 
matching page instead of allocating a new page.
- the patch also adds a new statistics field for node-local allocs. They 
should be rare - the codepath is quite slow, especially compared to the 
normal kmem_cache_alloc.

Badri: Could you test it?
Andrew, could you add the patch to the next -mm kernel? I'm running it 
right now, no obvious problems.

Signed-Off-By: Manfred Spraul <manfred@colorfullife.com>