def _reload(self):
        """reload all children

        posix only
        """
        self._run_hooks('reload')

        # Reset forktimes to respawn services quickly
        self._forktimes = []
        signal.signal(signal.SIGHUP, signal.SIG_IGN)
        os.killpg(0, signal.SIGHUP)
        signal.signal(signal.SIGHUP, self._signal_catcher)
reload all children

        posix only