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    SubjectRe: [ANNOUNCE][RFC] PlugSched-6.4 for 2.6.18-rc2
    Al Boldi wrote:
    > Peter Williams wrote:
    >> Al Boldi wrote:
    >>> Peter Williams wrote:
    >>>> Al Boldi wrote:
    [bits deleted]
    >>>>> It may be really great, to allow schedulers perPid parent, thus
    >>>>> allowing the stacking of different scheduler semantics. This could
    >>>>> aid flexibility a lot.
    >>>> I'm don't understand what you mean here. Could you elaborate?
    >>> i.e: Boot the kernel with spa_no_frills, then start X with spa_ws.
    >> It's probably not a good idea to have different schedulers managing the
    >> same resource. The way to do different scheduling per process is to use
    >> the scheduling policy mechanism i.e. SCHED_FIFO, SCHED_RR, etc.
    >> (possibly extended) within each scheduler. On the other hand, on an SMP
    >> system, having a different scheduler on each run queue (or sub set of
    >> queues) might be interesting :-).
    >
    > What's wrong with multiple run-queues on UP?

    A really high likelihood of starvation of some tasks.

    Peter
    --
    Peter Williams pwil3058@bigpond.net.au

    "Learning, n. The kind of ignorance distinguishing the studious."
    -- Ambrose Bierce
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