As far as Debian is concerned, we do have 4.9.x in old old stable aka stretch 4.19.x in old stable aka buster 5.10.x in stable aka bullseye 5.16.x in unstable/bookworm We do provide backports of current systemd versions for bullseye. I also do care that users upgrading from bullseye to bookworm can continue to use the old stable kernel, which would be 5.10.x So all in all, not an issue from the Debian side, as this would mean the baseline would be 5.10.x Obviously I can't speak for all our downstreams (like raspbian) or individual users with their self-compiled kernels. Which I guess is more common among Debian then e.g. Fedora users. Regards, Michael Am Di., 22. März 2022 um 17:34 Uhr schrieb Zbigniew Jędrzejewski-Szmek <zbyszek@xxxxxxxxx>: > > Hi all, > > we are considering dropping upstream support for kernel versions < 4.4. > Would this be a problem for anyone? (*). > > Zbyszek > > > (*) If you answer "yes", please substantiate why you are running new > systemd with such old kernels.