mptcp_kernel is the kernel package which built with mptcp (MultiPath TCP) function. The source code is hosted in github .
The RPM package is hosted on Fedora copr. It can be used on Fedora and CentOS (only x86_64) and their some versions..
####WARNING
This package is now still working in progress and being tested by Kenjiro Nakayama. Please don't use it in your production system. And this is not official repository and please take full responsibility for your actions.