Re: [patch 1/2] x86: add numa=possible command line option

Américo Wang
2010-11-21T14:23:11Z

Hi, David

On Sat, Nov 20, 2010 at 06:28:31PM -0800, David Rientjes wrote:
>Adds a numa=possible=<N> command line option to set an additional N nodes
>as being possible for memory hotplug. This set of possible nodes
>controls nr_node_ids and the sizes of several dynamically allocated node
>arrays.
>
>This allows memory hotplug to create new nodes for newly added memory
>rather than binding it to existing nodes.
>
>The first use-case for this will be node hotplug emulation which will use
>these possible nodes to create new nodes to test the memory hotplug
>callbacks and surrounding memory hotplug code.
>

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?

Also, numa=possible= is not as clear as numa=max=, for me at least.

Thanks.