hello.... > wake_up_process(task_ptr); > Now, sometime it is possible that the process is already dead, e.g. > user to ctrl-c on console. In this case, I get: > Unable to handle kernel paging request at virtual address d29dbdb4 > Is there a way, where I can very efficiently check for existence of > process ? Maybe the easiest check is making sure task_ptr is not NULL (task_ptr is actually a pointer to a task_struct, right?). there is also a chance that the process is still on Z (zombie) state, so check for this one too. task_ptr->state is the you are looking for. You can also check fork task_ptr->flags is equal to PF_EXITING. Maybe there are other...so please check the actual implementation of do_exit() (kernel/sched.c I think) for complete insight on how process termination works... regards Mulyadi -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
