[$] Custom page-cache policies with BPF

The kernel's page cache is charged with maintaining pages (or, morecorrectly, folios) containing copies ofdata from files in the filesystem; its performance has a big effect on theperformance of the system as a whole. One of the key decisions the kernelmust make is when to evict folios from the page cache. At the 2026 Linux Storage,Filesystem, Memory Management, and BPF Summit, Tal Zussman ran amemory-management-track session on how the page cache could be bettercustomized for specific workloads. It will not be much of a spoiler to saythat it involves BPF.