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    SubjectRe: sched: Move SCHED_DEBUG sysctl to debugfs
    Date
    Peter,

    I just realized that we moved away sysctl tunabled to debugfs in next.
    We have seen several cases where it was benefitial to set
    sched_migration_cost_ns to a lower value. For example with KVM I can
    easily get 50% more transactions with 50000 instead of 500000.
    Until now it was possible to use tuned or /etc/sysctl.conf to set
    these things permanently.

    Given that some people do not want to have debugfs mounted all the time
    I would consider this a regression. The sysctl tunable was always
    available.

    I am ok with the "informational" things being in debugfs, but not
    the tunables. So how do we proceed here?

    Christian

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