config ZRAM tristate "Compressed RAM block device support" depends on BLOCK select LZO_COMPRESS select LZO_DECOMPRESS default n help Creates virtual block devices called /dev/zramX (X = 0, 1, ...). Pages written to these disks are compressed and stored in memory itself. These disks allow very fast I/O and compression provides good amounts of memory savings. It has several use cases, for example: /tmp storage, use as swap disks and maybe many more. See zram.txt for more information. Project home: http://compcache.googlecode.com/ config ZRAM_STATS bool "Enable statistics for compressed RAM disks" depends on ZRAM default y help Enable statistics collection for compressed RAM devices. Statistics are exported through ioctl interface, so you have to use zramconfig program to get them. This adds only a minimal overhead. If unsure, say Y.