[patch] mm: per-CPU replicated pagecache (for testing)

Trial the replicated pagecache on non-NUMA machines by doing per-CPU replication. Actually there is a slight change in one algorithm because there is no such thing as page_to_cpuid. To minimise the code change, this just pretends smp_processor_id returns a node id. Technically this will blow up

[patch] mm: per-CPU replicated pagecache (for testing)

Trial the replicated pagecache on non-NUMA machines by doing per-CPU replication. Actually there is a slight change in one algorithm because there is no such thing as page_to_cpuid. To minimise the code change, this just pretends smp_processor_id returns a node id. Technically this will blow up