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    SubjectRe: [PATCH 2/4] ptrace: remove the extra wake_up_process() from ptrace_detach()
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    Of course I agree that the current code is wrong here.  But I'm still not
    at all clear on what practical compatibility problems it introduces. This
    change is OK if and only if we are really making the only area clean and
    well-defined in the same release cycle. It doesn't really matter that the
    old behavior was ill-defined and unreliable in absolute terms, because the
    practical userland experience of it in real-world cases is what userland
    has grown to expect. We can't break any such expectations until we have a
    clear answer about how to solve the problems correctly.

    Thanks,
    Roland


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