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    SubjectRe: [PATCH] Do not use cpu_to_node() to find an offlined cpu's node.
    On Thu, 18 Oct 2012, Tang Chen wrote:

    > We are working on this problem. Since it is complicated, it really
    > takes us some time. Sorry for the delay. :)
    >
    > Actually, we intend to clear cpu-to-node mappings when a whole node is
    > removed. But the node hot-plug code is still under development, so I
    > think Wen will send a fix patch soon. :)
    >

    Ok, thanks for the update. I agree that we should be clearing the mapping
    at node hot-remove since any cpu that would subsequently get onlined and
    assume one of the previous cpu's ids is not guaranteed to have the same
    affinity.

    I'm just really hoping that we don't touch the acpi code and that we can
    remove both cpu_hotplug-unmap-cpu2node-when-the-cpu-is-hotremoved.patch
    and cpu_hotplug-unmap-cpu2node-when-the-cpu-is-hotremoved-fix.patch from
    -mm.

    Thanks again!


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