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    SubjectRe: [PATCH 0/6] IO context sharing

    On Tue, 2008-01-22 at 10:49 +0100, Jens Axboe wrote:
    > Hi,
    > Today io contexts are per-process and define the (surprise) io context
    > of that process. In some situations it would be handy if several
    > processes share an IO context. With syslets it's especially crucial that
    > the threads working on behalf of the parent process are seen as the same
    > IO context. That goes from both a fairness and performance point of
    > view, since IO schedulers like AS and CFQ base decisions on what the
    > IO context state is. This patchset adds support for processes sharing a
    > single io context and also adds a CLONE_IO flag to denote sharing of
    > IO context.

    Are you planning on extending this to a hierarchical CFQ for cgroups, or
    just giving the IO context to a cgroup?

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