> There are other concerns. Let me see if I understand this. A thread > (other than the leader) can exec and we then need to change the > real_timer to wake the new task which will NOT be using the same task > struct.
That's correct. de_thread will turn the thread calling exec into the new leader and kill off all the other threads, including the old leader. The exec'ing thread's existing task_struct is reassigned to the PID of the original leader. > My looking at the code shows that the thread leader can exit and then > stays around as a zombi until the last thread in the group exits. That is correct. > If an alarm comes during this wait I suspect it will wake this zombi and > cause problems. You are mistaken. The signal code handles process signals sent when the leader is a zombie. The group leader sticks around with the PID that matches the TGID, until there are no live threads with its TGID. That is how process-wide kill can still work. Thanks, Roland - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
