2 bool "Dynamic compression of swap pages and clean pagecache pages"
3 depends on CRYPTO=y && SWAP=y && CLEANCACHE && FRONTSWAP && !ZCACHE
7 Zcache2 doubles RAM efficiency while providing a significant
8 performance boosts on many workloads. Zcache2 uses
9 compression and an in-kernel implementation of transcendent
10 memory to store clean page cache pages and swap in RAM,
11 providing a noticeable reduction in disk I/O. Zcache2
12 is a complete rewrite of the older zcache; it was intended to
13 be a merge but that has been blocked due to political and
14 technical disagreements. It is intended that they will merge
15 again in the future. Until then, zcache2 is a single-node
19 bool "Cross-machine RAM capacity sharing, aka peer-to-peer tmem"
20 depends on CONFIGFS_FS=y && SYSFS=y && !HIGHMEM && ZCACHE2=y
22 # must ensure struct page is 8-byte aligned
23 select HAVE_ALIGNED_STRUCT_PAGE if !64_BIT
26 RAMster allows RAM on other machines in a cluster to be utilized
27 dynamically and symmetrically instead of swapping to a local swap
28 disk, thus improving performance on memory-constrained workloads
29 while minimizing total RAM across the cluster. RAMster, like
30 zcache2, compresses swap pages into local RAM, but then remotifies
31 the compressed pages to another node in the RAMster cluster.