[$] Using large folios for text areas

Quite a bit of work has been done in recent years to allow the kernel tomake more use of large folios. That progress has not yet reached thehandling of text (executable code) areas, though. During thememory-management track of the 2025 Linux Storage, Filesystem,Memory-Management, and BPF Summit, Ryan Roberts ran a session on how thatsituation might be improved. It would be a relatively small and containedoperation, but can give a measurable performance improvement.