gfs2_trace - can enable trace events, disable trace events, and capture data from GFS2 trace events.

gfs2_trace  can enabled and disable trace events on all trace events or selected trace events. gfs2_trace
       can capture the output of the trace events and write the output to a file. When capturing  trace  events,
       the  script  will  exit  when control-c is pressed. The trace events will be then written to the selected
       file.

       gfs2_trace - can enable trace events, disable trace events, and capture data from GFS2 trace events.

-h,--help
              Prints out a short usage message and exits.

       -d,--debug
              enables debug logging.

       -q,--quiet
              disables logging to console.

       -l,--list
              lists the enabled state and filters for the GFS2 trace events

       -E,--enable_all_trace_events
              enables all trace_events for GFS2

       -e<traceeventname>,----enable_trace_event=<traceeventname>
              selected trace_events that will be enabled for GFS2

       -N,--disable_all_trace_events
              disables all trace_events for GFS2

       -n<traceeventname>,----disable_trace_event=<traceeventname>
              selected trace_events that will be enabled for GFS2

       -c<outputfilename>,--capture=<outputfilename>
              enables capturing of trace events and will save the data to a file

gfs2_trace(8)

gfs2_trace [-dqEN] [-e traceeventname] [-n traceeventname] [-o outputfilename]