Messages in this thread | | | Date | Fri, 25 Jan 2013 17:29:42 -0800 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH 3/3] acpi, memory-hotplug: Support getting hotplug info from SRAT. |
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On 01/25/2013 05:12 PM, Andrew Morton wrote: > On Fri, 25 Jan 2013 17:42:09 +0800 > Tang Chen <tangchen@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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