diff options
Diffstat (limited to 'drivers/staging/ramster/Kconfig')
| -rw-r--r-- | drivers/staging/ramster/Kconfig | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/drivers/staging/ramster/Kconfig b/drivers/staging/ramster/Kconfig index 8349887827dc..843c54101438 100644 --- a/drivers/staging/ramster/Kconfig +++ b/drivers/staging/ramster/Kconfig @@ -1,13 +1,30 @@ +config ZCACHE2 + bool "Dynamic compression of swap pages and clean pagecache pages" + depends on CRYPTO=y && SWAP=y && CLEANCACHE && FRONTSWAP && !ZCACHE + select CRYPTO_LZO + default n + help + Zcache2 doubles RAM efficiency while providing a significant + performance boosts on many workloads. Zcache2 uses + 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. Zcache2 + is a complete rewrite of the older zcache; it was intended to + be a merge but that has been blocked due to political and + technical disagreements. It is intended that they will merge + again in the future. Until then, zcache2 is a single-node + version of ramster. + config RAMSTER bool "Cross-machine RAM capacity sharing, aka peer-to-peer tmem" - depends on (CLEANCACHE || FRONTSWAP) && CONFIGFS_FS=y && !ZCACHE && !XVMALLOC && !HIGHMEM && NET - select LZO_COMPRESS - select LZO_DECOMPRESS + depends on CONFIGFS_FS=y && SYSFS=y && !HIGHMEM && ZCACHE2=y + # 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 - zcache, compresses swap pages into local RAM, but then remotifies + zcache2, compresses swap pages into local RAM, but then remotifies the compressed pages to another node in the RAMster cluster. |