Not sure. The NetMap team at least told me that upstream didn't want their code. This might be because NetMap requires special vendor-provided (but still open source, if I understand correctly) drivers for optimum performance, or it might be because they use a single codebase to support Windows, Linux, and FreeBSD, if I understand correctly.

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On Feb 12, 2018 2:21 PM, "Greg KH" <greg@kroah.com> wrote:

On Mon, Feb 12, 2018 at 12:48:11PM -0500, Demi Obenour wrote:
> Why haven't NetMap or MegaPipe been merged? I am wondering because they
> seem to be big wins for performance, but neither has been upstreamed.

Has anyone actually submitted the patches upstream? That's usually the
first step :)