Deal all: I have some questions about times in #include <sys/times.h>. As far as I know, times will "get process and waited-for child process times". so if the child is not finish or dead, this function will cause the deadlock, right? I guess deadlock should not happen, kernel should provide some mechanism in kernel to prevent it happen. if my assumption is correct, where I can find it? appreciate your help, miloody -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ