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-rw-r--r--usr/Kconfig54
1 files changed, 33 insertions, 21 deletions
diff --git a/usr/Kconfig b/usr/Kconfig
index 43a3a0fe8f29..588c588791e2 100644
--- a/usr/Kconfig
+++ b/usr/Kconfig
@@ -46,49 +46,50 @@ config INITRAMFS_ROOT_GID
If you are not sure, leave it set to "0".
config RD_GZIP
- bool "Initial ramdisk compressed using gzip"
+ bool "Support initial ramdisks compressed using gzip" if EMBEDDED
default y
- depends on BLK_DEV_INITRD=y
+ depends on BLK_DEV_INITRD
select DECOMPRESS_GZIP
help
Support loading of a gzip encoded initial ramdisk or cpio buffer.
If unsure, say Y.
config RD_BZIP2
- bool "Initial ramdisk compressed using bzip2"
- default n
- depends on BLK_DEV_INITRD=y
+ bool "Support initial ramdisks compressed using bzip2" if EMBEDDED
+ default !EMBEDDED
+ depends on BLK_DEV_INITRD
select DECOMPRESS_BZIP2
help
Support loading of a bzip2 encoded initial ramdisk or cpio buffer
If unsure, say N.
config RD_LZMA
- bool "Initial ramdisk compressed using lzma"
- default n
- depends on BLK_DEV_INITRD=y
+ bool "Support initial ramdisks compressed using LZMA" if EMBEDDED
+ default !EMBEDDED
+ depends on BLK_DEV_INITRD
select DECOMPRESS_LZMA
help
- Support loading of a lzma encoded initial ramdisk or cpio buffer
+ Support loading of a LZMA encoded initial ramdisk or cpio buffer
If unsure, say N.
+if INITRAMFS_SOURCE!=""
+
choice
prompt "Built-in initramfs compression mode"
help
- This setting is only meaningful if the INITRAMFS_SOURCE is
- set. It decides by which algorithm the INITRAMFS_SOURCE will
- be compressed.
- Several compression algorithms are available, which differ
- in efficiency, compression and decompression speed.
- Compression speed is only relevant when building a kernel.
- Decompression speed is relevant at each boot.
-
- If you have any problems with bzip2 or lzma compressed
+ This option decides by which algorithm the builtin initramfs
+ will be compressed. Several compression algorithms are
+ available, which differ in efficiency, compression and
+ decompression speed. Compression speed is only relevant
+ when building a kernel. Decompression speed is relevant at
+ each boot.
+
+ If you have any problems with bzip2 or LZMA compressed
initramfs, mail me (Alain Knaff) <alain@knaff.lu>.
- High compression options are mostly useful for users who
- are low on disk space (embedded systems), but for whom ram
- size matters less.
+ High compression options are mostly useful for users who are
+ low on RAM, since it reduces the memory consumption during
+ boot.
If in doubt, select 'gzip'
@@ -133,3 +134,14 @@ config INITRAMFS_COMPRESSION_LZMA
smaller with LZMA in comparison to gzip.
endchoice
+
+endif
+
+if INITRAMFS_SOURCE=""
+# The builtin initramfs is so small so we don't want to bug the user...
+
+config INITRAMFS_COMPRESSION_NONE
+ bool
+ default y
+
+endif