linux/drivers/staging/ramster/Kconfig
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   1config RAMSTER
   2        bool "Cross-machine RAM capacity sharing, aka peer-to-peer tmem"
   3        depends on (CLEANCACHE || FRONTSWAP) && CONFIGFS_FS=y && !ZCACHE && !XVMALLOC && !HIGHMEM
   4        select LZO_COMPRESS
   5        select LZO_DECOMPRESS
   6        default n
   7        help
   8          RAMster allows RAM on other machines in a cluster to be utilized
   9          dynamically and symmetrically instead of swapping to a local swap
  10          disk, thus improving performance on memory-constrained workloads
  11          while minimizing total RAM across the cluster.  RAMster, like
  12          zcache, compresses swap pages into local RAM, but then remotifies
  13          the compressed pages to another node in the RAMster cluster.
  14