Re: [PATCH v2] powerpc/numa: set node_possible_map to only node_online_map during boot
From: Michael Ellerman <mpe@ellerman.id.au>
Date: 2015-03-09 23:55:06
On Thu, 2015-03-05 at 21:27 -0800, Nishanth Aravamudan wrote:
quoted hunk ↗ jump to hunk
diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c index 0257a7d659ef..0c1716cd271f 100644 --- a/arch/powerpc/mm/numa.c +++ b/arch/powerpc/mm/numa.c@@ -958,6 +958,13 @@ void __init initmem_init(void) memblock_dump_all(); + /* + * Reduce the possible NUMA nodes to the online NUMA nodes, + * since we do not support node hotplug. This ensures that we + * lower the maximum NUMA node ID to what is actually present. + */ + node_possible_map = node_online_map;
That looks nice, but is it generating what we want? ie. is the content of node_online_map being *copied* into node_possible_map. Or are we changing node_possible_map to point at node_online_map? cheers