[$] Fighting the zombie-memcg invasion

Memory control groups (or "memcgs") allow an administrator to manage thememory resources given to the processes running on a system. Often,though, memcgs seem to have memory-use problems of their own, and that hasmade them into a recurring Linux Storage, Filesystem, and Memory-ManagementSummit topic since at least 2019. The topic returned at the 2023 event with a focus on thehandling of shared, anonymous memory. The quirks associated with thismemory type, it seems, can subject systems to an unpleasant sort of zombieinvasion; a session in the memory-management track led by T.J. Mercier,Yosry Ahmed, and Chris Li discussed possible solutions.