Comment 10 for bug 1686470

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Julian Andres Klode (juliank) wrote : Re: Apt updates that are uniformally spread across all timezones, with predictable application windows

I think the "locking" is already done by systemd. When units specify an ordering, it seems that one unit will only start when the other has shut down:

"Given two units with any ordering dependency between them, if one unit is shut down and the other is started up, the shutdown is ordered before the start-up"