+* Flight recorder mode
+
+The flight recorder mode writes data into overwritten buffers for all channels,
+including control channels, except for the facilities tracefiles.
+
+The following lttctl commands take a flight recorder trace :
+
+Create trace channel, start lttd on normal channels, start tracing:
+lttctl -n tracename -d -l /mnt/relayfs/ltt -t /tmp/trace1 -m flight
+
+Stop tracing, start lttd on flight recorder channels, destroy trace channels :
+lttctl -n tracename -f -l /mnt/relayfs/ltt -t /tmp/trace1 -m flight
+