[$] CXL 1: Management and tiering

Compute Express
Link (CXL) is an upcoming memory technology that is clearly on the
minds of Linux memory-management developers; there were five sessions
dedicated to the topic at the 2022 Linux Storage,
Filesystem, Memory-management and BPF Summit (LSFMM). The first three
sessions, on May 3, covered various aspects of memory management in the
presence of CXL. It seems that
CXL may bring some welcome capabilities, especially for cloud-service
providers, but that will come at the cost of some headaches on the
kernel-development side.