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    SubjectRe: [RFC v13][PATCH 00/14] Kernel based checkpoint/restart
    On Tue, 10 Feb 2009 09:05:47 -0800
    Dave Hansen <> wrote:

    > On Tue, 2009-01-27 at 12:07 -0500, Oren Laadan wrote:
    > > Checkpoint-restart (c/r): a couple of fixes in preparation for 64bit
    > > architectures, and a couple of fixes for bugss (comments from Serge
    > > Hallyn, Sudakvev Bhattiprolu and Nathan Lynch). Updated and tested
    > > against v2.6.28.
    > >
    > > Aiming for -mm.
    > Is there anything that we're waiting on before these can go into -mm? I
    > think the discussion on the first few patches has died down to almost
    > nothing. They're pretty reviewed-out. Do they need a run in -mm? I
    > don't think linux-next is quite appropriate since they're not _quite_
    > aimed at mainline yet.

    I raised an issue a few months ago and got inconclusively waffled at.
    Let us revisit.

    I am concerned that this implementation is a bit of a toy, and that we
    don't know what a sufficiently complete implementation will look like.
    There is a risk that if we merge the toy we either:

    a) end up having to merge unacceptably-expensive-to-maintain code to
    make it a non-toy or

    b) decide not to merge the unacceptably-expensive-to-maintain code,
    leaving us with a toy or

    c) simply cannot work out how to implement the missing functionality.

    So perhaps we can proceed by getting you guys to fill out the following

    - In bullet-point form, what features are present?

    - In bullet-point form, what features are missing, and should be added?

    - Is it possible to briefly sketch out the design of the to-be-added

    For extra marks:

    - Will any of this involve non-trivial serialisation of kernel
    objects? If so, that's getting into the
    unacceptably-expensive-to-maintain space, I suspect.

    - Does (or will) this feature also support process migration? If
    not, I'd have thought this to be a showstopper.

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