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    SubjectRe: [PATCH] Performance regression in 2.6.7-rc3


    On Wed, 16 Jun 2004, Nick Piggin wrote:
    >
    > I think balance on clone probably needs to be turned off by default
    > presently.
    >
    > It slows down a simple thread creation test by a factor of 7(!) here,
    > and has quite a few not too difficult to imagine performance problems.

    I agree. However, I still think we should do my suggested
    "wake_up_new(p,clone_flags)" thing, and then have the logic on whether to
    try to care about threading or not be in schedule.c, not in kernel/fork.c.

    The fact is, fork.c shouldn't try to make scheduling decisions. But it
    could inform the scheduler about the new process, and THAT can then make
    the decisions.

    Linus
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