35  * @level: pid namespace level
177 	/* Don't allow any more processes into the pid namespace */  in zap_pid_ns_processes()
182 	 * This speeds up the namespace shutdown, plus see the comment  in zap_pid_ns_processes()
191 	 * Find remaining pid_ts in the namespace, signal and wait for them  in zap_pid_ns_processes()
194 	 * Note:  This signals each threads in the namespace - even those that  in zap_pid_ns_processes()
197 	 * 	  namespace, but that could be unnecessarily expensive if the  in zap_pid_ns_processes()
198 	 * 	  pid namespace has just a few processes. Or we need to  in zap_pid_ns_processes()
199 	 * 	  maintain a tasklist for each pid namespace.  in zap_pid_ns_processes()
216 	 * parent namespace are detached and become EXIT_DEAD.  in zap_pid_ns_processes()
226 	 * namespace.  Such processes are created with setns()+fork().  in zap_pid_ns_processes()
240 	 * pid namespace is reaped all of the processes in the pid  in zap_pid_ns_processes()
241 	 * namespace are gone.  in zap_pid_ns_processes()
291 	 * is volatile in a living namespace anyway and a code writing to  in pid_ns_ctl_handler()
405 	 * Only allow entering the current active pid namespace  in pidns_install()
406 	 * or a child of the current active pid namespace.  in pidns_install()
410 	 * children can not escape their current pid namespace.  in pidns_install()
431 	/* See if the parent is in the current namespace */  in pidns_get_parent()