Post Syndicated from corbet original https://lwn.net/Articles/1073103/

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