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    SubjectRe: [PATCH 2/3] vfork: make it killable
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    On Fri, 2011-08-12 at 19:56 +0200, Oleg Nesterov wrote:
    > Make vfork() killable.
    >
    > Change do_fork(CLONE_VFORK) to do wait_for_completion_killable().
    > If it fails we do not return to the user-mode and never touch ->mm
    > shared with our child.
    >
    > However, in this case we should clear child->vfork_done before
    > return, we use task_lock() in do_fork()->wait_for_vfork_done()
    > and complete_vfork_done() to serialize with each other.

    It's probably worth updating the comment above task_lock() in
    include/linux/sched.h, to say that it is now used to protect
    ->vfork_done.



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