It would be nice if there was a manpage that described ixl(4) in some detail without having to go to the source code.
We're working on it, but the first version probably won't describe ixl in very much detail.
ixl(4) is in CURRENT: http://www.freebsd.org/cgi/man.cgi?query=ixl&apropos=0&sektion=0&manpath=FreeBSD+11-current&arch=default&format=html
Yup, there's one in CURRENT, but it hasn't been backported to stable/10 yet..
A commit references this bug: Author: brueffer Date: Wed Jul 15 16:47:15 UTC 2015 New revision: 285603 URL: https://svnweb.freebsd.org/changeset/base/285603 Log: MFC: r277218, r277219, r280572, r280573, r280574 Add manpages for the ixl and ixlv drivers. PR: 194313 Approved by: re (marius) Changes: _U stable/10/ stable/10/share/man/man4/Makefile stable/10/share/man/man4/ixl.4 stable/10/share/man/man4/ixlv.4
I merged the manpages to stable/10; thanks!
Thanks!