On Wed, 21 Mar 2007, Eric Dumazet wrote:

> The fast path is to put the pointer, into the cpu array cache. This object
> might be given back some cycles later, because of a kmem_cache_alloc() : No
> need to access the two cache lines (struct page, struct slab)

If you do that then the slab will no longer return objects from the 
desired nodes. The assumption is that cpu array objects are from the local 
node.
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