[$] The twilight of the version-1 memory controller

Almost immediately after the merging of controlgroups, kernel developers set their sights on reimplementing themproperly. The second version of the control-group API started tricklinginto the kernel around the 3.16 release in 2014 and users have long sincebeen encouraged to migrate, but support for (and users of) the initial APIremain. At the 2024Linux Storage, Filesystem, Memory-Management and BPF Summit,memory-management developers discussed whether (and when) it might bepossible to remove the version-1 memory controller. The session was led byShakeel Butt and (participating remotely) Roman Gushchin.