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    SubjectRe: [PATCH 2/3] mm: make the threshold of enabling THP configurable
    于 2011年06月22日 17:16, Mel Gorman 写道:
    >
    > What I meant was that there is a rational reason why 512M is the
    > default for enabling THP by default. Tuning it lower than that by any
    > means makes very little sense. Tuning it higher might make some sense
    > but it is more likely that THP would simply be disabled via sysctl. I
    > see very little advantage to introducing this Kconfig option other
    > than as a source of confusion when running make oldconfig.
    >

    The tunable range is (512, 8192), so 512M is the minimum.

    Sure, I knew it can be disabled via /sys, actually we can do even
    more in user-space, that is totally move the 512M check out of kernel,
    why we didn't?

    In short, I think we should either remove the 512M from kernel, or
    make 512M to be tunable.

    Thanks.
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