cachefs deja vu?

Among other things, its handling of things like SELinux is greatly improved (hence all that credentials work a few months back), the 'cachefs' caching filesystem is joined by 'cachefiles', which keeps the cache on a local FS; and it's now general enough to cope with complicated horrors like AFS.

As far as I can tell it works flawlessly and with almost zero setup required. It's particularly effective for boots-from-NFS systems, where NFS's near-total lack of caching otherwise seriously impacts their speed: with fs-cache in the way, after a while the cache is mostly populated and the system hardly needs to hit the network at all.