Put some Xen text into Bookworm release notes.
We should get some content into the official release notes document for Bullseye, since that's the way to overcome a chicken/egg problem. Putting stuff into NEWS or README is nice, but it can't be read before upgrading. ;]
Examples of content are:
- Do not use "aptitude full-upgrade" to do the upgrade to Xen 4.1X, since it tries to be overly helpful and already runs autoremove, which will remove e.g. xen-utils-4.11 when the 4.11 hypervisor is still running, resulting in a system where the user cannot shut down virtual machines any more before rebooting.
- Be aware that after when qemu is used to run HVM type virtual machines, it will not be possible to start a virtual machine again before rebooting the host machine because the new qemu links to the new Xen version libraries and the old hypervisor version is still running.
- In general, strongly recommend to not do anything else than shutting down or saving the running domUs and rebooting the host machine ASAP after upgrading the Xen packages.
So, task here:
- Agree on what section in the release notes would be best to add this. (Near '4.6. Upgrading your kernel and related packages'? Or, an entry in '5.3. Package specific issues'?
- Morph the stuff above into proper text.
- File bug against release-notes with ready-made contents and request to add the text.