1config ZRAM 2 tristate "Compressed RAM block device support" 3 depends on BLOCK && SYSFS && ZSMALLOC 4 select LZO_COMPRESS 5 select LZO_DECOMPRESS 6 default n 7 help 8 Creates virtual block devices called /dev/zramX (X = 0, 1, ...). 9 Pages written to these disks are compressed and stored in memory 10 itself. These disks allow very fast I/O and compression provides 11 good amounts of memory savings. 12 13 It has several use cases, for example: /tmp storage, use as swap 14 disks and maybe many more. 15 16 See zram.txt for more information. 17 18config ZRAM_LZ4_COMPRESS 19 bool "Enable LZ4 algorithm support" 20 depends on ZRAM 21 select LZ4_COMPRESS 22 select LZ4_DECOMPRESS 23 default n 24 help 25 This option enables LZ4 compression algorithm support. Compression 26 algorithm can be changed using `comp_algorithm' device attribute. 27 28config ZRAM_DEBUG 29 bool "Compressed RAM block device debug support" 30 depends on ZRAM 31 default n 32 help 33 This option adds additional debugging code to the compressed 34 RAM block device driver. 35