Block device as cache

modulename: bcache.ko

configname: CONFIG_BCACHE

Linux Kernel Configuration
└─>Device Drivers
└─>Multiple devices driver support (RAID and LVM)
└─>Block device as cache
In linux kernel since version 3.1 (release Date: 2011-10-24)
Allows a block device to be used as cache for other devices; uses
a btree for indexing and the layout is optimized for SSDs.

See <a href="https://www.kernel.org/doc/Documentation/admin-guide/bcache.rst">Documentation/admin-guide/bcache.rst</a> for details.
source code:
drivers/md/bcache/

depends
CONFIG_MD