[$] Managing pages outside of the direct map

When Brendan Jackman proposeda session for the 2026 Linux Storage,Filesystem, Memory Management, and BPF Summit, his topic was "apagetable library for the kernel". During the actualmemory-management-track session, though, he stated that the idea had"fizzled" and he was going to cover related topics instead. Whatresulted was a session on ways to efficiently manage pages that are notpresent in the kernel's direct map.