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    SubjectRe: [PATCH v2 5/5] page_alloc: Bootmem limit with movablecore_map
    At 11/27/2012 11:22 AM, Jianguo Wu Wrote:
    > On 2012/11/27 11:19, Wen Congyang wrote:
    >
    >> At 11/27/2012 08:58 AM, Jianguo Wu Wrote:
    >>> On 2012/11/26 23:48, H. Peter Anvin wrote:
    >>>
    >>>> On 11/26/2012 05:15 AM, Tang Chen wrote:
    >>>>>
    >>>>> Hi Wu,
    >>>>>
    >>>>> That is really a problem. And, before numa memory got initialized,
    >>>>> memblock subsystem would be used to allocate memory. I didn't find any
    >>>>> approach that could fully address it when I making the patches. There
    >>>>> always be risk that memblock allocates memory on ZONE_MOVABLE. I think
    >>>>> we can only do our best to prevent it from happening.
    >>>>>
    >>>>> Your patch is very helpful. And after a shot look at the code, it seems
    >>>>> that acpi_numa_memory_affinity_init() is an architecture dependent
    >>>>> function. Could we do this somewhere which is not depending on the
    >>>>> architecture ?
    >>>>>
    >>>>
    >>>> The movable memory should be classified as a non-RAM type in memblock,
    >>>> that way we will not allocate from it early on.
    >>>>
    >>>> -hpa
    >>>
    >>>
    >>> yep, we can put movable memory in reserved.regions in memblock.
    >>
    >> Hmm, I don't think so. If so, memory in reserved.regions contain two type
    >> memory: bootmem and movable memory. We will put all pages not in reserved.regions
    >> into buddy system. If we put movable memory in reserved.regions, we have
    >> no chance to put them to buddy system, and can't use them after system boots.
    >>
    >
    > yes, you are right. Or we can fix movablecore_map when add memory region to memblock.

    If so, we should know the nodes address range...

    Thanks
    Wen Congyang

    >> Thanks
    >> Wen Congyang
    >>
    >>>
    >>>>
    >>>>
    >>>> .
    >>>>
    >>>
    >>>
    >>>
    >>>
    >>
    >>
    >> .
    >>
    >
    >
    >
    >



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