-The filter component needs the LTTng-UST events to contain the
-`ip` and `vpid` fields in their context.
-
-To add those context fields with the man:lttng(1) command-line tool
-before the tracers are active (before `lttng start`):
+To get debugging information for LTTng-UST events which occur in
+executables and libraries which the system's loader loads (what
+you can see with man:ldd(1)):