To my surprise there was 4-RT release made, so after rebasing to 4.0.4 and
adding UltraKSM and BFQ I compiled it and am enjoying the result. In case you’d
like to give it a try, it’s quite easy for .deb-based distros. Grab the
packages, then just do dpkg -i *.deb
. No warranty, use at your own risk (as
usual). Let me know if you enjoyed it too.