Re: [RFC] [PATCH] more support for memory-less-node.

> In my understanding, a "node" is a block of cpu, memory, devices.
> and there could be cpu-only-node, memory-only-node, device-only-node...

The trouble with this is that you'll need to harden large parts
of code against these.  Especially a NULL pgdat is something quite
dangerous. You could make it a dummy empty pgdat, but just assigning it
nearby seems easier.

-Andi
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