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    SubjectRe: [RFC v2 PATCH 0/4] speed up page allocation for __GFP_ZERO
    > > Win or not depends on its effect. For our case, it solves the issue
    > > that we faced, so it can be thought as a win for us. If others don't
    > > have the issue we faced, the result will be different, maybe they will
    > > be affected by the side effect of this feature. I think this is your
    > > concern behind the question. right? I will try to do more tests and
    > > provide more benchmark performance data.
    >
    > Yes, zeroying memory does have a noticeable overhead but we cannot
    > simply allow tasks to spil over this overhead to all other users by
    > default. So if anything this would need to be an opt-in feature
    > configurable by administrator.
    > --
    > Michal Hocko
    > SUSE Labs

    I know the overhead, so I add a switch in /sys/ to enable or disable
    it dynamically.

    Thanks
    Liang

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