added ZCACHE, CLEANCACHE, FRONTSWAP (thanks to @faux123) with some fixes

DooMLoRD · May 28, 2012 · 48e3ec0 · 48e3ec0
1 parent 9034ae5
commit 48e3ec0
Show file tree

Hide file tree

Showing 28 changed files with 3,602 additions and 48 deletions.
diff --git a/kernel/arch/arm/configs/uckernel_defconfig b/kernel/arch/arm/configs/uckernel_defconfig
@@ -1,7 +1,6 @@
 #
 # Automatically generated make config: don't edit
 # Linux kernel version: 2.6.35.7
-# Sat Dec  3 17:16:46 2011
 #
 CONFIG_ARM=y
 CONFIG_SYS_SUPPORTS_APM_EMULATION=y
@@ -422,12 +421,13 @@ CONFIG_FLATMEM=y
 CONFIG_FLAT_NODE_MEM_MAP=y
 CONFIG_PAGEFLAGS_EXTENDED=y
 CONFIG_SPLIT_PTLOCK_CPUS=4
-CONFIG_CLEANCACHE=y
 # CONFIG_PHYS_ADDR_T_64BIT is not set
 CONFIG_ZONE_DMA_FLAG=0
 CONFIG_VIRT_TO_BUS=y
 # CONFIG_KSM is not set
 CONFIG_DEFAULT_MMAP_MIN_ADDR=4096
+CONFIG_CLEANCACHE=y
+CONFIG_FRONTSWAP=y
 # CONFIG_LEDS is not set
 CONFIG_ALIGNMENT_TRAP=y
 # CONFIG_UACCESS_WITH_MEMCPY is not set
@@ -1998,6 +1998,7 @@ CONFIG_ZRAM_DEFAULT_PERCENTAGE=25
 CONFIG_ZRAM_LZO=y
 # CONFIG_ZRAM_SNAPPY is not set
 CONFIG_ZRAM_DEFAULT_DISKSIZE=100663296
+CONFIG_ZCACHE=y
 # CONFIG_BATMAN_ADV is not set
 # CONFIG_FB_SM7XX is not set
 

diff --git a/kernel/drivers/staging/Kconfig b/kernel/drivers/staging/Kconfig
@@ -121,6 +121,8 @@ 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/kernel/drivers/staging/Makefile b/kernel/drivers/staging/Makefile
@@ -42,6 +42,7 @@ obj-$(CONFIG_DX_SEP)		+= sep/
 obj-$(CONFIG_IIO)		+= iio/
 obj-$(CONFIG_ZRAM)		+= zram/
 obj-$(CONFIG_XVMALLOC)		+= zram/
+obj-$(CONFIG_ZCACHE)		+= zcache/
 obj-$(CONFIG_WLAGS49_H2)	+= wlags49_h2/
 obj-$(CONFIG_WLAGS49_H25)	+= wlags49_h25/
 obj-$(CONFIG_BATMAN_ADV)	+= batman-adv/

diff --git a/kernel/drivers/staging/zcache/Kconfig b/kernel/drivers/staging/zcache/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.
diff --git a/kernel/drivers/staging/zcache/Makefile b/kernel/drivers/staging/zcache/Makefile
@@ -0,0 +1,3 @@
+zcache-y	:=	zcache-main.o tmem.o
+
+obj-$(CONFIG_ZCACHE)	+=	zcache.o
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,3 @@
		zcache-y := zcache-main.o tmem.o

		obj-$(CONFIG_ZCACHE) += zcache.o