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    SubjectRe: PATCH(?): linux-2.4.4-pre2: fork should run child first


    On Sat, 14 Apr 2001, Rik van Riel wrote:
    >
    > Also, have you managed to find a real difference with this?

    It actually makes a noticeable difference on lmbench, so I think adam is
    100% right.

    > If it turns out to be beneficial to run the child first (you
    > can measure this), why not leave everything the same as it is
    > now but have do_fork() "switch threads" internally ?

    Probably doesn't much matter. We've invalidated the TLB anyway due to the
    page table copy, so the cost of switching the MM is not all that
    noticeable.

    Linus

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