event_filter_pid_sched_switch_probe_pre 611 kernel/trace/trace_events.c unregister_trace_sched_switch(event_filter_pid_sched_switch_probe_pre, tr); event_filter_pid_sched_switch_probe_pre 1617 kernel/trace/trace_events.c register_trace_prio_sched_switch(event_filter_pid_sched_switch_probe_pre,