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    SubjectRe: [RFC][PATCH] page reclaim throttle take2
    Hi

    > One more thing, I would request you to add default heuristics (number of
    > reclaimers), based on the number of cpus in the system. Letting people tuning it
    > is fine, but defaults should be related to number of cpus, nodes and zones on
    > the system. Zones can be reaped in parallel per node and cpus allow threads to
    > run in parallel. So please use that to come up with good defaults, instead of a
    > number like "3".

    I don't think so.
    all modern many cpu machine stand on NUMA.
    it mean following,
    - if cpu increases, then zone increases, too.

    if default value increase by #cpus, lock contension dramatically increase
    on large numa.

    Have I overlooked anything?


    and, (but) i afraid to 3 is too small value.
    if you have another test result on large machine, please show me.

    - kosaki




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