On 01/25/2013 05:12 PM, Andrew Morton wrote:
> On Fri, 25 Jan 2013 17:42:09 +0800
> Tang Chen <tangc...@cn.fujitsu.com> wrote:
>
>> NOTE: Using this way will cause NUMA performance down because the whole node
>> will be set as ZONE_MOVABLE, and kernel cannot use memory on it.
>> If users don't want to lose NUMA performance, just don't use it.
>
> I agree with this, but it means that nobody will test any of your new code.
>
> To get improved testing coverage, can you think of any temporary
> testing-only patch which will cause testers to exercise the
> memory-hotplug changes?
>
There is another problem: if ALL the nodes in the system support
hotpluggable memory, what happens?
-hpa
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