From mboxrd@z Thu Jan  1 00:00:00 1970
From: greg@kroah.com (Greg KH)
Date: Wed, 14 Feb 2018 09:51:04 +0100
Subject: Why haven't NetMap or MegaPipe been merged?
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On Tue, Feb 13, 2018 at 01:00:39PM -0500, Demi Obenour wrote:
> 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.

Well, "special" drivers, as well as a compatibility layer for other
operating systems are a very good reason to not get the code merged into
the kernel.  No subsystem would ever accept such an odd requirement.

greg k-h