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    SubjectRe: [PATCH 1/2] kdump: Allow shrinking of kdump region to be overridden

    Hi,

    > The crashkernel region is specified via kernel cmdline, so why
    > not just drop a failure when it overlaps with RMO region?
    > Am I missing something?

    Unfortunately a ppc64 kernel requires a chunk of RMO memory. We would
    need the ability to specify multiple crashkernel regions - about 32MB
    in the RMO and the rest can be anywhere. That sounds pretty fragile for
    a user to configure successfully on the cmdline.

    Thats why the ppc64 crashkernel region begins mid way through the RMO
    region. It means both kernels get a chunk of RMO and we only have to
    deal with one crashkernel reservation in all the tools and
    documentation.

    Anton


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