Post Syndicated from jake original https://lwn.net/Articles/982887/

David Howells wanted to discuss swap handling in light of multi-page folios
in a combined storage, filesystem, and memory-management session at
the 2024 Linux Storage,
Filesystem, Memory Management, and BPF Summit. Swapping has always been
done with a one-to-one mapping of memory pages to swap slots, he said, but
swapping multi-page folios breaks that assumption. He wondered if it would
make sense to use filesystem techniques to track swapped-out folios.