diff options
| author | Dan Magenheimer <dan.magenheimer@oracle.com> | 2012-02-15 15:54:16 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-02-15 17:02:03 (GMT) |
| commit | 19ee3ef5f4bb22d17eb73d89a520437745b8b444 (patch) | |
| tree | 9d51281ef697f834529386aca0fa168783dfe1ea /drivers/staging/ramster/Kconfig | |
| parent | b605c9621e57e72cbd45d59fd93d97b4a75c3597 (diff) | |
| download | linux-fsl-qoriq-19ee3ef5f4bb22d17eb73d89a520437745b8b444.tar.xz | |
staging: ramster: local compression + tmem
RAMster implements peer-to-peer transcendent memory, allowing a "cluster"
of kernels to dynamically pool their RAM.
This patch copies files from drivers/staging/zcache. RAMster compresses
pages locally before transmitting them to another node, so we can
leverage the zcache and tmem code directly. Note: there are
no ramster-specific changes yet to these files.
(Why copy? The ramster tmem.c/tmem.h changes are definitely shareable
between zcache and ramster; the eventual destination for tmem.c
is the linux lib directory. Ramster changes to zcache are more substantial
and zcache is currently undergoing some significant unrelated changes
(including a new allocator and breaking zcache-main.c into smaller files),
so it seemed best to branch temporarily and merge later.)
Signed-off-by: Dan Magenheimer <dan.magenheimer@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/ramster/Kconfig')
| -rw-r--r-- | drivers/staging/ramster/Kconfig | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/staging/ramster/Kconfig b/drivers/staging/ramster/Kconfig new file mode 100644 index 0000000..7fabcb2 --- /dev/null +++ b/drivers/staging/ramster/Kconfig @@ -0,0 +1,13 @@ +config ZCACHE + tristate "Dynamic compression of swap pages and clean pagecache pages" + depends on CLEANCACHE || FRONTSWAP + select XVMALLOC + select LZO_COMPRESS + select LZO_DECOMPRESS + default n + help + Zcache doubles RAM efficiency while providing a significant + performance boosts on many workloads. Zcache uses lzo1x + 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. |