Release Notes: The boot-time readahead implementation for rotating media will now read the read-ahead data in multiple passes which consist of all read requests made in equidistant time intervals.
Release Notes: Configuration of unit files may now be extended via drop-in files. systemctl gained a "list-dependencies" command. Resource limits can be controlled at runtime. The vconsole setup will apply font settings to all VTs.
Release Notes: Timer units now support calendar time events. udev now supports a number of different naming policies for network interfaces for predictable names. bootchart has been added to the systemd tree. A number of PolicyKit actions are now bound together with "imply" rules.
Release Notes: udev gained support for loading additional device properties from an indexed database keyed by dev identifiers. The Journal gained support for the "Message Catalog", an indexed database to link up additional information with journal entries.
Release Notes: An (optional) journal gateway daemon is now available as "systemd-journal-gatewayd.service". This service provides access to the journal via HTTP and JSON.
Release Notes: journald will now log the maximum size the journal files may take up on disk. The multi-seat X wrapper tool has been stripped down, as Xorg is now capable of enumerating graphics devices via udev in a seat-aware way.
Release Notes: Unit changes are now logged to the journal. udev will now automatically inform the btrfs kernel logic about btrfs RAID components showing up. logind's inhibition logic has been updated to handle the lid switch and the power and sleep keys all the time.