On Tue, 2012-09-25 at 10:39 +0800, Tang Chen wrote: > > We do this because nr_node_ids changed, right? This means the entire > > distance table grew/shrunk, which means we should do the level scan > > again. > > It seems that nr_node_ids will not change once the system is up. > I'm not quite sure. If I am wrong, please tell me. :) Ah, right you are.. So the problem is that cpumask_of_node() doesn't contain offline cpus, and we might not boot the machine with all cpus present. In that case I guess the suggested hotplug hooks are fine. Its just that your changelog was confusing. -- To unsubscribe from this list: send the line "unsubscribe linux-numa" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html