General filesystem local caching manager

modulename: fscache.ko

configname: CONFIG_FSCACHE

Linux Kernel Configuration
└─>File systems
└─>General filesystem local caching manager
In linux kernel since version 2.6.30 (release Date: 2009-06-09)  
This option enables a generic filesystem caching manager that can be
used by various network and other filesystems to cache data locally.
Different sorts of caches can be plugged in, depending on the
resources available.

See Documentation/filesystems/caching/fscache.rst for more information.

source code: