-Fix the locking of module hooks.<br>
-Per cpu read lock on trace structure OR use list rcu.<br>
-Remove the callback struct from the trace struct.<br>
+Finish integrating lttctl with lttd.<br>
+Add information in the buffer header : buffer size, etc etc...<br>
+ -> this information is so small that we can repeat it. Makes flight recorder
+ easier to decode.<br>
+Add trace start structure to facility channel.<br>