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    SubjectRe: [PATCH 1/3] mm: completely disable THP by transparent_hugepage=never
    On 06/20/2011 12:50 PM, Andrea Arcangeli wrote:
    > On Tue, Jun 21, 2011 at 12:34:28AM +0800, Amerigo Wang wrote:
    >> transparent_hugepage=never should mean to disable THP completely,
    >> otherwise we don't have a way to disable THP completely.
    >> The design is broken.
    >
    > We want to allow people to boot with transparent_hugepage=never but to
    > still allow people to enable it later at runtime. Not sure why you
    > find it broken... Your patch is just crippling down the feature with
    > no gain. There is absolutely no gain to disallow root to enable THP
    > later at runtime with sysfs, root can enable it anyway by writing into
    > /dev/mem.
    >
    > Unless you're root and you enable it, it's completely disabled, so I
    > don't see what you mean it's not completely disabled. Not even
    > khugepaged is started, try to grep of khugepaged...

    Agreed, I don't really see the reason for these patches.

    Amerigo?


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