On 12/16/2013 06:44 AM, Thomas Bächler wrote:
Am 16.12.2013 03:25, schrieb Gerardo Exequiel Pozzi:
On 12/15/2013 08:59 PM, Thomas Bächler wrote:
The new mkinitcpio 16 (yes, we bumped from 0.15 to 16) in testing contains a new feature that automatically generates an "initramfs" on shutdown. systemd will pivot to this image on shutdown. All it does is re-run systemd-shutdown in a ramdisk, thus allowing a proper umount of / and proper shutdown of ALL loop and device mapper devices.
This feature is enabled automatically if * /run/initramfs exists (will be created on your next boot by tmpfiles), * /run/initramfs/shutdown doesn't exist or is not an executable, * The user hasn't masked mkinitcpio-generate-shutdown-ramfs.service.
This method should also be able to completely obsolete the custom shutdown hook in archiso and the mkinitcpio shutdown hook (using any of those will disable the new stuff).
Nice, thanks for the work on making systemd working on initramfs/de-initramfs.
But by nature of the archiso mount structure (/ mounted from /run/archiso/...) of course this does not work, since systemd does not know about this (in other words it needs to mount move /run/archiso outside / before anything)
Remember that this is the first step, that I do on custom archiso_shutdown script:
# /oldroot depends on things inside /oldroot/run/archiso... mkdir /oldrun mount -n --move /oldroot/run /oldrun
pivot_root semantics are seriously weird. Wouldn't it help if we moved /run/archiso to /run/initramfs/archiso before switching back to initrd?
/run/archiso is not a mountpoint, can not be moved. Anyway from point of view of "de-initramfs", /oldroot depends on things from /oldroot/run. What I try is from archiso hook modify all paths "s|run/archiso|run/initramfs/archiso|" but is the same scenario. (/oldroot depends on things from /oldroot/run/initramfs/archiso instead). -- Gerardo Exequiel Pozzi \cos^2\alpha + \sin^2\alpha = 1