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Commit 40297927 authored by H. Peter Anvin's avatar H. Peter Anvin
Browse files

bzip2/lzma: don't ask for compression mode for the default initramfs 



Impact: Kconfig noise reduction, documentation

The default initramfs is so small that it makes no sense to worry
about the additional memory taken by not double-compressing it.
Therefore, don't bug the user with it.

Also, improve the description of the option, which was downright
incorrect.

Signed-off-by: default avatarH. Peter Anvin <hpa@zytor.com>
parent 55d1d26f

usr/Kconfig

+22 −10
Original line number Original line Diff line number Diff line
@@ -72,23 +72,24 @@ config RD_LZMA 
	  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 unsure, say N.





if INITRAMFS_SOURCE!=""



choice

choice

	prompt "Built-in initramfs compression mode"

	prompt "Built-in initramfs compression mode"

	help

	help

	  This setting is only meaningful if the INITRAMFS_SOURCE is

	  This option decides by which algorithm the builtin initramfs

	  set. It decides by which algorithm the INITRAMFS_SOURCE will

	  will be compressed.  Several compression algorithms are

	  be compressed.

	  available, which differ in efficiency, compression and

	  Several compression algorithms are available, which differ

	  decompression speed.  Compression speed is only relevant

	  in efficiency, compression and decompression speed.

	  when building a kernel.  Decompression speed is relevant at

	  Compression speed is only relevant when building a kernel.

	  each boot.

	  Decompression speed is relevant at each boot.





	  If you have any problems with bzip2 or LZMA compressed

	  If you have any problems with bzip2 or LZMA compressed

	  initramfs, mail me (Alain Knaff) <alain@knaff.lu>.

	  initramfs, mail me (Alain Knaff) <alain@knaff.lu>.





	  High compression options are mostly useful for users who

	  High compression options are mostly useful for users who are

	  are low on disk space (embedded systems), but for whom ram

	  low on RAM, since it reduces the memory consumption during

	  size matters less.

	  boot.





	  If in doubt, select 'gzip'

	  If in doubt, select 'gzip'
@@ -133,3 +134,14 @@ config INITRAMFS_COMPRESSION_LZMA 
	  smaller with LZMA in comparison to gzip.

	  smaller with LZMA in comparison to gzip.





endchoice

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