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    SubjectRe: [PATCH] 2.6.16 - futex: small optimization (?)

    * Bill Davidsen <davidsen@tmr.com> wrote:

    > >What are you suggesting here, that the implementation of
    > >FUTEX_WAKE_OP is "ignoring inefficiencies"? Please explain why and
    > >what you would do differently to solve that inefficiency.
    >
    > I am suggesting that "There are no such situations anymore in an
    > optimal userlevel implementation" is not the right approach to the
    > original post. What I would do differently is to evaluate the original
    > suggestion to see if it would in fact be more efficient. [...]

    that's what we did a year ago for a similar futex rescheduling
    inefficiency, and came up with the FUTEX_WAKE_OP solution, which is now
    part of the kernel and is used by glibc. But we are all ears for
    alternative suggestions.

    Ingo
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