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zram: add package to use compressed ram disk for swap

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The busybox size is increased by 3.2KByte uncompressed on bcm47xx with 
this commit.

This zram-swap automatically creates a zram device, a swap partition on 
it and make the kernel swap pages to it.

Thank you Bastian Bittorf <bittorf@bluebottle.com> for idea and the 
script.


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35025 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
Hauke Mehrtens
2013-01-06 16:21:29 +00:00
parent 009b82e8ef
commit 71830c60f7
4 changed files with 192 additions and 2 deletions
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21
package/kernel/modules/other.mk
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@@ -747,3 +747,24 @@ define KernelPackage/ikconfig/description
endef
$(eval $(call KernelPackage,ikconfig))
define KernelPackage/zram
SUBMENU:=$(OTHER_MENU)
TITLE:=ZRAM
DEPENDS:=@!LINUX_3_3 +kmod-lib-lzo
KCONFIG:= \
CONFIG_ZSMALLOC \
CONFIG_ZRAM \
CONFIG_ZRAM_DEBUG=n
FILES:= \
$(LINUX_DIR)/drivers/staging/zsmalloc/zsmalloc.ko \
$(LINUX_DIR)/drivers/staging/zram/zram.ko
AUTOLOAD:=$(call AutoLoad,20,zsmalloc zram)
endef
define KernelPackage/zram/description
Compressed RAM block device support
endef
$(eval $(call KernelPackage,zram))