CONFIG_ZBUD (not configurable)

modulename: zbud.ko

configname: CONFIG_ZBUD

Linux Kernel Configuration
└─>ZBUD
In linux kernel since version 3.10 (release Date: 2013-06-30)  
A special purpose allocator for storing compressed pages.
It is designed to store up to two compressed pages per physical
page. While this design limits storage density, it has simple and
deterministic reclaim properties that make it preferable to a higher
density approach when reclaim will be used.

source code:
is depended by
CONFIG_ZSWAP