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    SubjectRe: Kernel panic due to page migration accessing memory holes
    On Wed, Feb 17, 2010 at 04:45:54PM -0800, Michael Bohan wrote:
    > I have encountered a kernel panic on the ARM/msm platform in the mm
    > migration code on 2.6.29. My memory configuration has two discontiguous
    > banks per our ATAG definition. These banks end up on addresses that
    > are 1 MB aligned. I am using FLATMEM (not SPARSEMEM), but my
    > understanding is that SPARSEMEM should not be necessary to support this
    > configuration. Please correct me if I'm wrong.

    Make sure you have ARCH_HAS_HOLES_MEMORYMODEL enabled.


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