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    SubjectRe: [PATCH 4/8] x86 boot: allow overlapping ebda and efi memmap memory ranges
    Paul Jackson wrote:
    > hpa wrote:
    >> Realistically, we need the infrastructure to be able to make paranoia
    >> reservations, and you need to be able to deal with later finding they
    >> are actually in use.
    >
    > While the tone of your reply sounds like something I would naturally
    > agree with, I can't actually figure out what you mean in this case ;).
    >
    > In particular, Peter, would you agree/disagree/other with the direction
    > that Huang and I agreed to last night:
    >
    >> Would you recommend doing this with code in arch/x86/kernel/head.c,
    >> that did not invoke reserve_ebda_region() if efi_enabled was set?

    I disagree with it, I do not consider it safe. I think you have to
    consider the difference between a "safety reservation" and a "actual
    reservation", with the latter being allowed to overlap the former.

    -hpa


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