[$] The future of ZONE_DEVICE

Alistair Popple started his session at the 2025 Linux Storage, Filesystem,
Memory-Management, and BPF Summit by proclaiming that ZONE_DEVICE
is 'the ugly stepchild' of the kernel's memory-management subsystem.
Ugly or not, the ability to manage memory that is attached to a peripheral
device rather than a CPU is increasingly important on current hardware.
Popple hoped to cover some of the challenges with ZONE_DEVICE and
find ways to make the stepchild a bit more attractive, if not bring it into
the family entirely.