I wrote/compiled a bunch of eventfd ATF tests as part of epoll-shim (https://github.com/jiixyj/epoll-shim/blob/master/test/eventfd-ctx-test.c, https://github.com/jiixyj/epoll-shim/blob/master/test/tst-eventfd.c). I would be happy to clean them up further and contribute them to the FreeBSD test suite in case a native eventfd gets accepted.
Tue, Oct 6
Sun, Oct 4
There also was https://reviews.freebsd.org/D2172 but I'm not sure how much of that is relevant anymore.
Apr 24 2020
I've uploaded a new version of the patch:
Thank you for the review! I've incorporated your comments and updated the diff.
Apr 22 2020
Jun 6 2019
... so it's worth trying to enable it by default again as support of this device is definitely changed since 2013.
Jun 4 2019
This was tried some years ago, but then reverted as the probing was deemed too intrusive (see r255152 and r255210). I don't know if something changed in the meantime.
Apr 28 2018
Apr 17 2017
I've added some inline comments about Linux device names, IDs and properties.
Here is a patch that I'm using on top of this series right now: