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| author | H. Peter Anvin <hpa@zytor.com> | 2009-03-28 17:24:03 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2009-03-28 17:27:15 -0700 |
| commit | 40297927575a50b1d0d308d735c445924d33fba6 (patch) | |
| tree | 30e85426767ea2caea16d3e66db0ff98066e2c6a /usr/Kconfig | |
| parent | 55d1d26f23383163a256d0de2aaf2b8fca83e611 (diff) | |
| download | lwn-40297927575a50b1d0d308d735c445924d33fba6.tar.gz lwn-40297927575a50b1d0d308d735c445924d33fba6.zip | |
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: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'usr/Kconfig')
| -rw-r--r-- | usr/Kconfig | 32 |
1 files changed, 22 insertions, 10 deletions
diff --git a/usr/Kconfig b/usr/Kconfig index a529b4d0530b..588c588791e2 100644 --- a/usr/Kconfig +++ b/usr/Kconfig @@ -72,23 +72,24 @@ config RD_LZMA 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. + 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 |