ftrace_pid_follow_sched_process_fork 6460 kernel/trace/ftrace.c register_trace_sched_process_fork(ftrace_pid_follow_sched_process_fork, ftrace_pid_follow_sched_process_fork 6465 kernel/trace/ftrace.c unregister_trace_sched_process_fork(ftrace_pid_follow_sched_process_fork,