config: extend small_flash feature

Extend the small_flash feature to disable swap, core dumps, and
kernel debug info, and change the squashfs block size to 1024KiB.

Also change squashfs fragment cache to 2 for small_flash to ease memory
usage.

Signed-off-by: Alex Maclean <monkeh@monkeh.net>
(backported from 11d6547455e848efb4fac0b983a07b11be5caf25)

diff --git a/config/Config-images.in b/config/Config-images.in
index afdbdc4079a09bb4627c362669fcc483d1d3493d..c7cc7fe3be2ca51b041560de5596f1d3f9287581 100644 (file)
--- a/config/Config-images.in
+++ b/config/Config-images.in
@@ -149,6 +149,7 @@ menu "Target Images"
                        int "Block size (in KiB)"
                        depends on TARGET_ROOTFS_SQUASHFS
                        default 64 if LOW_MEMORY_FOOTPRINT
+                       default 1024 if (SMALL_FLASH && !LOW_MEMORY_FOOTPRINT)
                        default 256
 
        menuconfig TARGET_ROOTFS_UBIFS

diff --git a/config/Config-kernel.in b/config/Config-kernel.in
index 58f7d6009442c8c41f99a6221e5f1a99765dc44b..f38cc792ddde907272b04559ecee34183835a478 100644 (file)
--- a/config/Config-kernel.in
+++ b/config/Config-kernel.in
@@ -31,7 +31,7 @@ config KERNEL_CRASHLOG
 
 config KERNEL_SWAP
        bool "Support for paging of anonymous memory (swap)"
-       default y
+       default y if !SMALL_FLASH
 
 config KERNEL_DEBUG_FS
        bool "Compile the kernel with debug filesystem enabled"
@@ -133,7 +133,7 @@ config KERNEL_DEBUG_KERNEL
 
 config KERNEL_DEBUG_INFO
        bool "Compile the kernel with debug information"
-       default y
+       default y if !SMALL_FLASH
        select KERNEL_DEBUG_KERNEL
        help
          This will compile your kernel and modules with debug information.
@@ -226,7 +226,7 @@ config KERNEL_COREDUMP
 config KERNEL_ELF_CORE
        bool "Enable process core dump support"
        select KERNEL_COREDUMP
-       default y
+       default y if !SMALL_FLASH
 
 config KERNEL_PROVE_LOCKING
        bool "Enable kernel lock checking"
@@ -807,6 +807,11 @@ config KERNEL_DEVKMEM
          /dev/kmem device is rarely used, but can be used for certain
          kind of kernel debugging operations.
 
+config KERNEL_SQUASHFS_FRAGMENT_CACHE_SIZE
+       int "Number of squashfs fragments cached"
+       default 2 if (SMALL_FLASH && !LOW_MEMORY_FOOTPRINT)
+       default 3
+
 #
 # compile optimiziation setting
 #

diff --git a/target/linux/generic/config-4.14 b/target/linux/generic/config-4.14
index b37eac41187653e49caf6a3926ad766b6bcd7836..fb8b7f4b5aa0ebbed7c6e2ec48fa41a71e1d0c6b 100644 (file)
--- a/target/linux/generic/config-4.14
+++ b/target/linux/generic/config-4.14
@@ -4684,7 +4684,7 @@ CONFIG_SQUASHFS=y
 # CONFIG_SQUASHFS_DECOMP_MULTI is not set
 CONFIG_SQUASHFS_DECOMP_MULTI_PERCPU=y
 # CONFIG_SQUASHFS_DECOMP_SINGLE is not set
-# CONFIG_SQUASHFS_EMBEDDED is not set
+CONFIG_SQUASHFS_EMBEDDED=y
 # CONFIG_SQUASHFS_FILE_CACHE is not set
 CONFIG_SQUASHFS_FILE_DIRECT=y
 CONFIG_SQUASHFS_FRAGMENT_CACHE_SIZE=3

diff --git a/target/linux/generic/config-4.9 b/target/linux/generic/config-4.9
index ea71560cad6566f716d120d4220d9f66785dd78d..17b2615178b8075163f61440faafdf3fbf47628a 100644 (file)
--- a/target/linux/generic/config-4.9
+++ b/target/linux/generic/config-4.9
@@ -4402,7 +4402,7 @@ CONFIG_SQUASHFS=y
 # CONFIG_SQUASHFS_DECOMP_MULTI is not set
 CONFIG_SQUASHFS_DECOMP_MULTI_PERCPU=y
 # CONFIG_SQUASHFS_DECOMP_SINGLE is not set
-# CONFIG_SQUASHFS_EMBEDDED is not set
+CONFIG_SQUASHFS_EMBEDDED=y
 # CONFIG_SQUASHFS_FILE_CACHE is not set
 CONFIG_SQUASHFS_FILE_DIRECT=y
 CONFIG_SQUASHFS_FRAGMENT_CACHE_SIZE=3