drivers/block/zram/Kconfig

   1 config 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
  18 config 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.