Here is a bit better worded news item for the upgrade. I think I've taken into account any concerns, but please check the grammar part. Thanks!
- Samuli
Title: Upgrade to >=sys-fs/udev-210 Author: Samuli Suominen <ssuomi...@gentoo.org> Content-Type: text/plain Posted: 2014-02-25 Revision: 1 News-Item-Format: 1.0 Display-If-Installed: <sys-fs/udev-210 The options CONFIG_DMIID and CONFIG_FHANDLE, CONFIG_NET are now required in the kernel. You will be warned of them if they are missing while you upgrade to >=sys-fs/udev-210 by the package manager. The most reliable way of disabling the new network interface scheme is still the kernel parameter "net.ifnames=0" since overriding the 80-net-name-slot.rules in /etc/udev/rules.d/ no longer works since upstream renamed the file to /lib/udev/rules.d/80-net-setup-link.rules The actual configuration is at /lib/systemd/network/99-default.link, which you can override in /etc/systemd/network/ So, to clarify, you can override the new .rules file or the .link file in /etc but using the kernel parameter is the most consistent way. Since both the systemd-udevd executable and the network configuration is stored at /lib/systemd, using a too wide INSTALL_MASK would be a mistake. [1] https://wiki.gentoo.org/wiki/Udev/upgrade#udev_208_to_210 [2] http://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames