linux/drivers/block/zram/Kconfig
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   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
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