Hi, I want to make a tag in a running process's task_struct. So the child will inherit this tag and all these processes will be distinguish form other processes. But the probelm is I can't find any bits or field of task_struct can be used to make a tag. Could anyone can give some suggestions? Thanks in advance! BR LiYanbo -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/