[$] Management of volatile CXL devices

ComputeExpress Link (CXL) memory is not like the ordinary RAM that one mightinstall into a computer; it can come and go at any time and is often notpresent when the kernel is booting. That complicates the management ofthis memory. During the memory-management track of the 2025 Linux Storage,Filesystem, Memory-Management, and BPF Summit, Gregory Price ran a sessionon the challenges posed by CXL and how they might be addressed.