Seong-lae Chocommon process exit
exit → exit status
1. Process termination
Removes most references to the terminating process from kernel data structures: by calling
__exit_mm(), __exit_files(), __exit_fs(), __exit_sighand().Parentless children become children of the init process Process 1
Invoke the
__schedule() function to select a new process to run.2. Process removal
- UNIX kernels are not allowed to discard data right after the process terminates, but only after the parent process has issued a wait()-like system call that refers to the terminated process (TASK_ZOMBIE state).
- Invoke release_task()
- Release 8KB memory area used to contain the thread_info struct and the Kernel Stack .