[$] Memory overcommit in containerized environments

Overcommitting memory is a longstanding tradition in the Linux world(and beyond); it is rare that an application uses all of the memoryallocated to it, so overcommitting can help to improve overall memoryutilization. In situations where memory has been overcommitted, though, itmay be necessary to respond quickly to ensure that applications have thememory they actually need, even when those needs change. At the 2023 Linux Storage, Filesystem,Memory-Management and BPF Summit, T.J. Alumbaugh (in the room) andYuanchu Xie (remotely)presented a new mechanism intended to help hosts provide containerizedguests with the memory resources they need.