config ZCACHE
bool "Dynamic compression of swap pages and clean pagecache pages"
- depends on (CLEANCACHE || FRONTSWAP) && CRYPTO=y && ZSMALLOC=y
+ depends on CRYPTO=y && SWAP=y && CLEANCACHE && FRONTSWAP
select CRYPTO_LZO
default n
help
compression and an in-kernel implementation of transcendent
memory to store clean page cache pages and swap in RAM,
providing a noticeable reduction in disk I/O.
+
+config RAMSTER
+ bool "Cross-machine RAM capacity sharing, aka peer-to-peer tmem"
+ depends on CONFIGFS_FS=y && SYSFS=y && !HIGHMEM && ZCACHE=y
+ depends on NET
+ # must ensure struct page is 8-byte aligned
+ select HAVE_ALIGNED_STRUCT_PAGE if !64_BIT
+ default n
+ help
+ RAMster allows RAM on other machines in a cluster to be utilized
+ dynamically and symmetrically instead of swapping to a local swap
+ disk, thus improving performance on memory-constrained workloads
+ while minimizing total RAM across the cluster. RAMster, like
+ zcache2, compresses swap pages into local RAM, but then remotifies
+ the compressed pages to another node in the RAMster cluster.