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    Subject[RFC][PATCH 0/7] Resource controllers based on process containers
    This patchset adds RSS, accounting and control and
    limiting the number of tasks and files within container.

    Based on top of Paul Menage's container subsystem v7

    RSS controller includes per-container RSS accounter,
    reclamation and OOM killer. It behaves like standalone
    machine - when container runs out of resources it tries
    to reclaim some pages and if it doesn't succeed in it
    kills some task which mm_struct belongs to container in
    question.

    Num tasks and files containers are very simple and
    self-descriptive from code.

    As discussed before when a task moves from one container
    to another no resources follow it - they keep holding the
    container they were allocated in.

    The difficulties met during using of Pauls' containers were:

    1. Container fork hook is placed before new task
    changes. This makes impossible of handling fork
    properly. I.e. new mm_struct should have pointer
    to RSS container, but we don't have one at that
    early time.

    2. Extended containers may register themselves too late.
    Kernel threads/helpers start forking, opening files
    and touching pages much earlier. This patchset
    workarounds this in not-so-cute manner and I'm waiting
    for Paul's comments on this issue.
    -
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