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build: kernel options, additions to top/busybox, modules (#253) 

Add kernel build options to conserve RAM.  Measured 520k reduction.

disable CRASHLOG interface, we can't really see it anyway
CONFIG_KERNEL_CRASHLOG=n

remove process core dump support (see above reasoning)
CONFIG_KERNEL_ELF_CORE=n

there is no "swap"
CONFIG_KERNEL_SWAP=n

remove debug symbols
CONFIG_KERNEL_KALLSYMS=n

remove debug info
CONFIG_KERNEL_DEBUG_INFO=n

more unnecessary kernel exports
CONFIG_STRIP_KERNEL_EXPORTS=y

remove libraries of unnecessary functions
CONFIG_USE_MKLIBS=y

compress /tmp 
CONFIG_PROCD_ZRAM_TMPFS=y

seldom used key stroke
CONFIG_KERNEL_MAGIC_SYSRQ=n

Not used with AREDN
CONFIG_PACKAGE_MAC80211_MESH=n

Above options Ref:  https://openwrt.org/docs/guide-user/additional-software/saving-space#modifying_build_configuration_variables

-------------

Additional options
CONFIG_BUSYBOX_DEFAULT_MKSWAP=n
CONFIG_BUSYBOX_CONFIG_MKSWAP=n

improved "top" command.
CONFIG_BUSYBOX_CONFIG_FEATURE_TOP_INTERACTIVE=y

additional modules to build
CONFIG_PACKAGE_kmod-usb3=m
CONFIG_PACKAGE_block-mount=m
CONFIG_PACKAGE_kmod-usb-storage=m
CONFIG_PACKAGE_kmod-usb-storage-extras=m
CONFIG_PACKAGE_kmod-usb-storage-uas=m

Additional filesystem modules complementing USB storage
CONFIG_PACKAGE_kmod-fs-vfat=m
CONFIG_PACKAGE_kmod-fs-ntfs=m
CONFIG_PACKAGE_kmod-fs-ext4=m
CONFIG_PACKAGE_e2fsprogs=m

Reduce log usage of /tmp and RAM
I can't find my notes of course...
CONFIG_LOG_BUF_SHIFT=16
CONFIG_LOG_CPU_MAX_BUF_SHIFT=16

additional options to support performance metrics
CONFIG_BUSYBOX_CONFIG_IOSTAT=y
CONFIG_BUSYBOX_CONFIG_RENICE=y
CONFIG_BUSYBOX_CONFIG_FEATURE_PS_LONG=y
This commit is contained in:
Eric 2018-10-31 16:21:49 -07:00 committed by Joe AE6XE
parent 9a47ff800a
commit a5e7a9d1cf
1 changed files with 24 additions and 1 deletions
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25
configs/common.config
View File

@ -1,3 +1,15 @@
CONFIG_KERNEL_CRASHLOG=n
CONFIG_KERNEL_SWAP=n
CONFIG_KERNEL_KALLSYMS=n
CONFIG_KERNEL_DEBUG_INFO=n
CONFIG_KERNEL_ELF_CORE=n
CONFIG_KERNEL_MAGIC_SYSRQ=n
CONFIG_PACKAGE_MAC80211_MESH=n
CONFIG_STRIP_KERNEL_EXPORTS=y
CONFIG_USE_MKLIBS=y
CONFIG_LOG_BUF_SHIFT=16
CONFIG_LOG_CPU_MAX_BUF_SHIFT=16
CONFIG_PROCD_ZRAM_TMPFS=y
CONFIG_KERNEL_IPV6=n
CONFIG_KERNEL_IPV6_MULTIPLE_TABLES=n
CONFIG_KERNEL_IPV6_SUBTREES=n
@ -10,6 +22,9 @@ CONFIG_BUSYBOX_CUSTOM=y
CONFIG_BUSYBOX_DEFAULT_FEATURE_IPV6=n
CONFIG_BUSYBOX_CONFIG_FEATURE_IPV6=n
CONFIG_BUSYBOX_CONFIG_TELNETD=y
CONFIG_BUSYBOX_DEFAULT_MKSWAP=n
CONFIG_BUSYBOX_CONFIG_MKSWAP=n
CONFIG_BUSYBOX_CONFIG_FEATURE_TOP_INTERACTIVE=y
CONFIG_PACKAGE_dnsmasq=y
CONFIG_PACKAGE_dropbear=y
CONFIG_PACKAGE_iperf3=m
@ -20,6 +35,15 @@ CONFIG_PACKAGE_kmod-usb-ehci=m
CONFIG_PACKAGE_kmod-usb-ohci=m
CONFIG_PACKAGE_kmod-usb-uhci=m
CONFIG_PACKAGE_kmod-usb2=m
CONFIG_PACKAGE_kmod-usb3=m
CONFIG_PACKAGE_block-mount=m
CONFIG_PACKAGE_kmod-fs-vfat=m
CONFIG_PACKAGE_kmod-fs-ntfs=m
CONFIG_PACKAGE_kmod-fs-ext4=m
CONFIG_PACKAGE_e2fsprogs=m
CONFIG_PACKAGE_kmod-usb-storage=m
CONFIG_PACKAGE_kmod-usb-storage-extras=m
CONFIG_PACKAGE_kmod-usb-storage-uas=m
CONFIG_PACKAGE_libgcc=y
CONFIG_PACKAGE_mtd=y
CONFIG_PACKAGE_ppp=n
@ -78,4 +102,3 @@ CONFIG_PACKAGE_vtun=m
CONFIG_IMAGEOPT=y
CONFIG_VERSIONOPT=y
CONFIG_VERSION_DIST="AREDN"