"8153644 JFR to adopt Unified Logging" added Java support for unified logging to JFR, but purposely we never changed the log statements so they use the new JFR tags, such as #instrumentation, because the code was not stable enough and we were not sure exactly how we should organize the tags. We should take the opportunity to fix this in JDK 9, since it will improve debuggability for both development and sustaining. It will also avoid confusing users with log output change in an update release.