On Dec 29, Ansgar <ansgar@debian.org> wrote: > as suggested in [1], I would like to see Debian to move to support > only the merged-usr filesystem layout. This would simplfy things for > the future and also address the problem with installing files under > aliased trees that dpkg has to do for both variants to be supported. As the architect of the Debian merged-usr transition, I agree: removing support for unmerged systems would simplify many things. Thank you Ansgar for bringing this to the CTTE. > I'm not asking the committee to decide on a concrete technical > implementation for this. Obviously we would need to also implement a > migration path for legacy installations for a move to merged-usr-only > to be implemented. This also isn't relevant for Debian 11 (bullseye), > but I would like to have enough time in the Debian 12 (bookworm) > cycle. Agreed. FWIW: we have had for a long time a reliable migration method, the usrmerge package. Except that on a live system it requires a reboot mid-conversion (due to bind mounts created by systemd): since this is inconvenient and mildly scary I did not propose wider adoption for buster. The best workaround would probably be to run it from the initramfs, but I have not been able to actually make this[1] work: I expect that somebody who knows initramfs-tools better than I do can fix it quickly. [1] https://salsa.debian.org/md/usrmerge/-/tree/initramfs -- ciao, Marco
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