The test case with removing kexec-tools before rebooting works for me. But I can only reproduce the issue by doing that. Can you share more about your setup so we can understand why exactly you hit this?
I think that having this fallback makes sense, and is fine for an SRU, but it would be good to understand the root cause better. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1969365 Title: focal: backport kexec fallback patch Status in systemd package in Ubuntu: Fix Released Status in systemd source package in Focal: Triaged Bug description: It would be great if focal's systemd could have https://github.com/systemd/systemd/commit/71180f8e57f8fbb55978b00a13990c79093ff7b3 backported to it. [Impact] We have observed that kexec'ing to another kernel will fail as the drive containing the `kexec` binary has been unmounted by the time systemd attempts to do so, indicated in the console: Starting Reboot via kexec... [ 163.960938] shutdown[1]: (sd-kexec) failed with exit status 1. [ 163.963463] reboot: Restarting system [Test Plan] 1) Launch a 20.04 instance 2) `apt-get install kexec-tools` 3) In `/boot`, filling in whatever <cmdline> needed in your environment: kexec -l vmlinuz --initrd initrd.img --append '<cmdline>' 4) `reboot` (I have reproduced this in a single-disk VM, so I assume it reproduces ~everywhere: if not, `apt-get remove kexec-tools` before the `reboot` could be used to emulate the unmounting.) [Where problems could occur] Users could inadvertently be relying on the current behaviour: if they have configured their systems to kexec, they currently will be rebooting normally, and this patch would cause them to start actually kexec'ing. [Other info] We're currently maintaining a systemd tree with only this patch added to focal's tree: this patch has received a bunch of testing from us in focal. This patch landed in v246, so it's already present in supported releases later than focal. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1969365/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
