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    SubjectRe: [PATCH 2/6] ksm: dont allow overlap memory addresses registrations.
    Izik Eidus wrote:
    > Rik van Riel wrote:
    >> Izik Eidus wrote:
    >>> subjects say it all.
    >>
    >> Not a very useful commit message.
    >>
    >> This makes me wonder, though.
    >>
    >> What happens if a user mmaps a 30MB memory region, registers it
    >> with KSM and then unmaps the middle 10MB?
    >
    > User cant break 30MB into smaller one.

    The user can break up the underlying VMAs though.

    I am just wondering out loud if we really want two
    VMA-like objects in the kernel, the VMA itself and
    a separate KSM object, with different semantics.

    Maybe this is fine, but I do think it's a question
    that needs to be thought about.

    --
    All rights reversed.


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