Messages in this thread | | | Date | Tue, 1 Sep 2009 23:03:32 -0700 (PDT) | From | David Rientjes <> | Subject | Re: [PATCH] Fix fake numa on ppc |
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On Wed, 2 Sep 2009, Benjamin Herrenschmidt wrote:
> Since I'm pretty sure there could be CPU less nodes just like there > could be memory-less nodes, it would be good if fake numa could > simulate them too :-) >
You don't want to simulate cpu less nodes since they do have affinity to ranges of memory, you want to map each fake node to a cpumask including all cpus with affinity to its memory, map each cpu to one fake node (with memory) that it has physical affinity to, and then give all fake nodes local NUMA distance to those on the same physical node. Memoryless nodes take care of themselves since they rely purely on node_distance(), so the index into the slit for all fake nodes to those without memory will be the same.
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