core/manager: Deprecate StartAuxiliaryScope() method

The method was added with migration of resources in mind (e.g. process's
allocated memory will follow it to the new scope), however, such a
resource migration is not in cgroup semantics. The method may thus have
the intended users and others could be guided to StartTransientUnit().

Since this API was advertised in a regular release, start the removal
with a deprecation message to callers.
Eventually, the goal is to remove the method to clean up DBus API and
simplify code (removal of cgroup_context_copy()).

Part of DBus docs is retained to satisfy build checks.

1 files changed, 3 insertions, 0 deletions

diff --git a/NEWS b/NEWS
index 408a60ddf7..c9684f268b 100644
--- a/NEWS
+++ b/NEWS
@@ -66,6 +66,9 @@ CHANGES WITH 257 in spe:
           filesystem. $SYSTEMD_NSPAWN_UNIFIED_HIERARCHY=0 can be used to override
           this behavior.
 
+        * D-Bus method org.freedesktop.systemd1.StartAuxiliaryScope() becomes
+          deprecated (reach out if you have use cases).
+
         libsystemd:
 
         * New sd-json component is now available as part of libsystemd. The