Hi,

alloc_percpu() calls kmem_cache_alloc_node() to allocate memory
on a particular node. But for non-NUMA cases, it doesn't matter
all the memory comes from same node.  This patch short-cuts and 
calls kmalloc() if its non-NUMA. I hate to add #ifdefs in the 
mainline code, but I don't see easy way around.

kmem_cache_alloc_node()allocates a new slab to satisfy allocation 
from that node instead of doing it from a partial slab from that node 
- which causes fragmentation (with my scsi-debug tests). Thats my 
next problem to deal with.

BTW, with this patch size-64 cache is no longer fragmented for
scsi-debug test case.

size-64            76920  76921     64   61    1 : tunables  120   60   
8 : slabdata   1261   1261   0

Thanks,
Badari