Hi Cristian... > Can somebody explain to me or point me to some explanation of what > the pgid and sid are and how they are related to the pid and the > tgid? Not sure if I can help much with. All I see is: - pgid is actually task_struct->signal->pgrp. See sys_getpgid() on kernel/sys.c (2.6.x) - sid is task_struct->signal->session. See sys_getsid(). Since they are included in signal_struct, I guess this is related with how signal is handled on process group. Seems it is also related with security module....maybe Mr Hartman can provide further clue... > I am trying to understand how the pid hashing works and how I can > change the pid of a process while it's running. I know I need to do > some __detach_pid and then attach it again under a different pid, but > I'm not sure what to do about the rest of the pid types (PGID, > SID)... This is related to your previous post, right? OOT, why do you want to change runnable task's pid? regards Mulyadi -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
