Re: [PATCH v3] mm/memory_hotplug: refrain from adding memory into an impossible node

+static int check_hotplug_node(int nid) +{ + int alt_nid; + + if (node_possible(nid)) + return nid; + + alt_nid = numa_map_to_online_node(nid); + if (alt_nid == NUMA_NO_NODE) + alt_nid = first_online_node; + WARN_TAINT(1, TAINT_FIRMWARE_WORKAROUND, + "node %d expected, but was absent from the node_possible_map, using %d instead\n", + nid, alt_nid);