• Steven Rostedt's avatar
    tracing: add event trace infrastructure · b77e38aa
    Steven Rostedt authored
    This patch creates the event tracing infrastructure of ftrace.
    It will create the files:
    
     /debug/tracing/available_events
     /debug/tracing/set_event
    
    The available_events will list the trace points that have been
    registered with the event tracer.
    
    set_events will allow the user to enable or disable an event hook.
    
    example:
    
     # echo sched_wakeup > /debug/tracing/set_event
    
    Will enable the sched_wakeup event (if it is registered).
    
     # echo "!sched_wakeup" >> /debug/tracing/set_event
    
    Will disable the sched_wakeup event (and only that event).
    
     # echo > /debug/tracing/set_event
    
    Will disable all events (notice the '>')
    
     # cat /debug/tracing/available_events > /debug/tracing/set_event
    
    Will enable all registered event hooks.
    Signed-off-by: default avatarSteven Rostedt <srostedt@redhat.com>
    b77e38aa
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