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    SubjectRe: [path][rfc] add PR_DETACH prctl command
    On 04/05, Stas Sergeev wrote:
    >
    > 05.04.2011 19:15, Oleg Nesterov wrote:
    >>>
    >>> + p->detaching = 0;
    >>> + continue;
    >> Yes, thanks, I didn't notice "continue". But then this is wrong again.
    >> This can race with wait_task_detached() called by our sub-thread, it
    >> can clear ->detaching before we check it.
    > But the above code is under write_lock_irq(&tasklist_lock), so why
    > would it race?

    wait_task_detached() clears detaching, then it drops tasklist and takes
    it for writing. forget_original_parent() can come in between.

    Oleg.



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