config ZRAM tristate "Compressed RAM block device support" depends on BLOCK && SYSFS && ZSMALLOC 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. config ZRAM_LZ4_COMPRESS bool "Enable LZ4 algorithm support" depends on ZRAM select LZ4_COMPRESS select LZ4_DECOMPRESS default n help This option enables LZ4 compression algorithm support. Compression algorithm can be changed using `comp_algorithm' device attribute.