cachefilesd 0.10.10-0.1 (arm64 binary) in ubuntu bionic

 FSCache is a generic caching manager in the Linux kernel which can be used
 by network and other filesystems to cache data locally.
 .
 CacheFiles is an FSCache backend that's meant to use as a cache a directory on
 an already mounted filesystem of a local type (such as Ext3). This package
 installs the userspace support required by the cachefiles backend.