This patchset promotes the zcache driver from staging to drivers/mm/.
zcache captures swap pages via frontswap and pages that fall
out of the page cache via cleancache and compress them in RAM,
providing a compressed RAM swap and a compressed second-chance
page cache.
Signed-off-by: Seth Jennings <sjenning@xxxxxxxxxxxxxxxxxx>
---
drivers/mm/Kconfig | 10 ++++++++++
drivers/mm/Makefile | 1 +
drivers/{staging => mm}/zcache/Makefile | 0
drivers/{staging => mm}/zcache/tmem.c | 0
drivers/{staging => mm}/zcache/tmem.h | 0
drivers/{staging => mm}/zcache/zcache-main.c | 0
drivers/staging/Kconfig | 2 --
drivers/staging/Makefile | 1 -
drivers/staging/zcache/Kconfig | 11 -----------
9 files changed, 11 insertions(+), 14 deletions(-)
create mode 100644 drivers/mm/Makefile
rename drivers/{staging => mm}/zcache/Makefile (100%)
rename drivers/{staging => mm}/zcache/tmem.c (100%)
rename drivers/{staging => mm}/zcache/tmem.h (100%)
rename drivers/{staging => mm}/zcache/zcache-main.c (100%)
delete mode 100644 drivers/staging/zcache/Kconfig
diff --git a/drivers/mm/Kconfig b/drivers/mm/Kconfig
index e5b3743..22289c6 100644
--- a/drivers/mm/Kconfig
+++ b/drivers/mm/Kconfig
@@ -1,3 +1,13 @@
menu "Memory management drivers"
+config ZCACHE
+ bool "Dynamic compression of swap pages and clean pagecache pages"
+ depends on (CLEANCACHE || FRONTSWAP) && CRYPTO=y && ZSMALLOC=y
+ select CRYPTO_LZO
+ default n
+ help
+ Zcache 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.
+
endmenu
diff --git a/drivers/mm/Makefile b/drivers/mm/Makefile
new file mode 100644
index 0000000..f36f509
--- /dev/null
+++ b/drivers/mm/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_ZCACHE) += zcache/
diff --git a/drivers/staging/zcache/Makefile b/drivers/mm/zcache/Makefile
similarity index 100%
rename from drivers/staging/zcache/Makefile
rename to drivers/mm/zcache/Makefile
diff --git a/drivers/staging/zcache/tmem.c b/drivers/mm/zcache/tmem.c
similarity index 100%
rename from drivers/staging/zcache/tmem.c
rename to drivers/mm/zcache/tmem.c
diff --git a/drivers/staging/zcache/tmem.h b/drivers/mm/zcache/tmem.h
similarity index 100%
rename from drivers/staging/zcache/tmem.h
rename to drivers/mm/zcache/tmem.h
diff --git a/drivers/staging/zcache/zcache-main.c b/drivers/mm/zcache/zcache-main.c
similarity index 100%
rename from drivers/staging/zcache/zcache-main.c
rename to drivers/mm/zcache/zcache-main.c
diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig
index b7f7bc7..0940d2e 100644
--- a/drivers/staging/Kconfig
+++ b/drivers/staging/Kconfig
@@ -76,8 +76,6 @@ source "drivers/staging/iio/Kconfig"
source "drivers/staging/zram/Kconfig"
-source "drivers/staging/zcache/Kconfig"
-
source "drivers/staging/wlags49_h2/Kconfig"
source "drivers/staging/wlags49_h25/Kconfig"
diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile
index ad74bee..6e1c491 100644
--- a/drivers/staging/Makefile
+++ b/drivers/staging/Makefile
@@ -33,7 +33,6 @@ obj-$(CONFIG_IPACK_BUS) += ipack/
obj-$(CONFIG_DX_SEP) += sep/
obj-$(CONFIG_IIO) += iio/
obj-$(CONFIG_ZRAM) += zram/
-obj-$(CONFIG_ZCACHE) += zcache/
obj-$(CONFIG_WLAGS49_H2) += wlags49_h2/
obj-$(CONFIG_WLAGS49_H25) += wlags49_h25/
obj-$(CONFIG_FB_SM7XX) += sm7xxfb/
diff --git a/drivers/staging/zcache/Kconfig b/drivers/staging/zcache/Kconfig
deleted file mode 100644
index 4881839..0000000
--- a/drivers/staging/zcache/Kconfig
+++ /dev/null
@@ -1,11 +0,0 @@
-config ZCACHE
- bool "Dynamic compression of swap pages and clean pagecache pages"
- depends on (CLEANCACHE || FRONTSWAP) && CRYPTO=y && ZSMALLOC=y
- select CRYPTO_LZO
- default n
- help
- Zcache doubles RAM efficiency while providing a significant
- performance boosts on many workloads. Zcache 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.
--
1.7.9.5
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