On Sun, 21 Nov 2010, AmÃrico Wang wrote: > I am not sure how much value of making this dynamic, > for CPU, we do this at compile time, i.e. NR_CPUS, > so how about NR_NODES? > This is outside the scope of node hotplug emulation, it needs to be built on top of whatever the kernel implements. > Also, numa=possible= is not as clear as numa=max=, for me at least. > I like name, but it requires that you know how many nodes that system already has. In other words, numa=possible=4 allows you to specify that 4 additional nodes will be possible, but initially offline, for this or other purposes. numa=max=4 would be no-op if the system actually had 4 nodes. I chose numa=possible over numa=additional because it is more clearly tied to node_possible_map, which is the only thing it modifies.