[$] Thread-level control with resource groups
The kernel's control-group mechanism allows
processes to be divided into
groups for the purposes of tracking and resource control. Both the API and
underlying implementation of this mechanism have been going through
considerable change in recent
years. As part of that change, the newer control-group API has lost the
ability to separately
manage threads within a process, a loss that is not welcome in some
quarters. Current work to replace that functionality is not finding an
entirely warm reception either, though.