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    SubjectRE: [ RESEND PATCH v3] Memory-Hotplug: Fix the bug on interface /dev/mem for 64-bit kernel

    3 points...
    1. I think this patch cannot be compiled in archs other than x86. Right ?
    IOW, please add static inline dummy...
    [Zheng, Shaohui] Agree, I will add a static dummy function

    2. pgdat->[start,end], totalram_pages etc...are updated at memory hotplug.
    Please place the hook nearby them.
    [Zheng, Shaohui] Agree.

    3. I recommend you yo use memory hotplug notifier.
    If it's allowed, it will be cleaner.
    It seems there are no strict ordering to update parameters this patch touches.

    [Zheng, Shaohui] Kame, do you means put the hook into function slab_mem_going_online_callback, it seems a good idea. If we select this method, we will need not to update these variable in function add_memory explicitly.


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