Post Syndicated from original https://lwn.net/Articles/837033/rss

The kernel project has a strong focus on not breaking user-space
applications; if something works with a given kernel release, it should
continue to work with subsequent releases. So it may be discouraging to
read the lengthy exposition on an apparent user-space API break in the announcement for the systemd 247-rc2
release. Changes to udev configuration files will be needed to keep
systems working, but the
systemd project claims that it “is not [the] fault of systemd or udev, but
caused by an incompatible kernel change that happened back in Linux
4.12“. It seems like an appropriate time to look at what happened,
how administrators need to respond, and whether anything can be done to
avoid this kind of thing from happening again.