On Thu, 5 Mar 2015, Nishanth Aravamudan wrote:
> diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
> index 0257a7d659ef..24de29b3651b 100644
> --- a/arch/powerpc/mm/numa.c
> +++ b/arch/powerpc/mm/numa.c
> @@ -958,9 +958,17 @@ void __init initmem_init(void)
>
> memblock_dump_all();
>
> + /*
> + * zero out the possible nodes after we parse the device-tree,
> + * so that we lower the maximum NUMA node ID to what is actually
> + * present.
> + */
> + nodes_clear(node_possible_map);
> +
> for_each_online_node(nid) {
> unsigned long start_pfn, end_pfn;
>
> + node_set(nid, node_possible_map);
> get_pfn_range_for_nid(nid, &start_pfn, &end_pfn);
> setup_node_data(nid, start_pfn, end_pfn);
> sparse_memory_present_with_active_regions(nid);
This seems a bit strange, node_possible_map is supposed to be a superset
of node_online_map and this loop is iterating over node_online_map to set
nodes in node_possible_map.
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