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    SubjectRe: [PATCH] ia64: change usermode HZ to 250
    On Thu, 2006-06-29 at 12:48 +0200, Jes Sorensen wrote:
    > Alan Cox wrote:
    > > Ar Iau, 2006-06-29 am 05:37 -0400, ysgrifennodd Jes Sorensen:
    > >> You have my vote for that one. Anything else is just going to cause
    > >> those broken userapps to continue doing the wrong thing. We should
    > >> really do this on all archs though.
    > >
    > > No need, all current mainstream architectures expose a constant user HZ.

    > But you are still going to have the issue where someone installs their
    > own kernel and apps will break because of this?

    to answer that question with one word: no.

    read what Alan said: the HZ exposed to userspace is *constant*. For
    example, the i386 user visible HZ is 100, even if the kernel runs at a
    HZ of 250 or 1000.... Just when a HZ value gets exposed to userspace,
    it's transformed into a HZ=100 based value.

    And that's not a distribution thing, that's the kernel
    honoring the stable-userspace-interface contract, and common sense..

    Arjan van de Ven

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      Last update: 2006-06-29 12:58    [W:0.027 / U:0.336 seconds]
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