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    SubjectRe: [PATCH] Process pinning
    Date
    In message <20010409170823.C2316@engr.sgi.com> you write:
    > Changes to array.c expose cpus_allowed in proc/pid/stat.

    Call me old fashioned, but I prefer my bitmasks in hex.

    Please also consider changing:

    still_running:
    c = goodness(prev, this_cpu, prev->active_mm);
    next = prev;

    to:

    still_running:
    if (prev & (1 << this_cpu)) {
    c = goodness(prev, this_cpu, prev->active_mm);
    next = prev;
    }

    Otherwise, you will keep scheduling a RT process forever on a
    disallowed CPU on which it is already running. And even a non-RT
    process will stick on its disallowed CPU as long as nothing else runs
    there.

    Learnt this the hard way from the hotplug CPU patch...
    Rusty.
    --
    Premature optmztion is rt of all evl. --DK
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