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| author |   Alain Knaff <alain@knaff.lu> | 2009-01-04 22:46:17 +0100 |
|---|---|---|
| committer |   H. Peter Anvin <hpa@zytor.com> | 2009-01-04 15:53:35 -0800 |
| commit | 30d65dbfe3add7f010a075991dc0bfeaebb7d9e1 (patch) | |
| tree | c60ce6748eea43d1e74d96ef03990b1e23f33b1d /drivers | |
| parent | bzip2/lzma: library support for gzip, bzip2 and lzma decompression (diff) | |
| download | linux-dev-30d65dbfe3add7f010a075991dc0bfeaebb7d9e1.tar.xz linux-dev-30d65dbfe3add7f010a075991dc0bfeaebb7d9e1.zip | |
bzip2/lzma: config and initramfs support for bzip2/lzma decompression
Impact: New code for initramfs decompression, new features
This is the second part of the bzip2/lzma patch
The bzip patch is based on an idea by Christian Ludwig, includes support for
compressing the kernel with bzip2 or lzma rather than gzip. Both
compressors give smaller sizes than gzip. Lzma's decompresses faster
than bzip2.
It also supports ramdisks and initramfs' compressed using these two
compressors.
The functionality has been successfully used for a couple of years by
the udpcast project
This version applies to "tip" kernel 2.6.28
This part contains:
- support for new compressions (bzip2 and lzma) in initramfs and
old-style ramdisk
- config dialog for kernel compression (but new kernel compressions
not yet supported)
Signed-off-by: Alain Knaff <alain@knaff.lu>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/block/Kconfig | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig index 0344a8a8321d..795594442428 100644 --- a/drivers/block/Kconfig +++ b/drivers/block/Kconfig @@ -358,6 +358,31 @@ config BLK_DEV_XIP will prevent RAM block device backing store memory from being allocated from highmem (only a problem for highmem systems). +config RD_BZIP2 + bool "Initial ramdisk compressed using bzip2" + default n + depends on BLK_DEV_INITRD=y + 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 + help + Support loading of a lzma encoded initial ramdisk or cpio buffer + If unsure, say N. + +config RD_GZIP + bool "Initial ramdisk compressed using gzip" + default y + depends on BLK_DEV_INITRD=y + select ZLIB_INFLATE + help + Support loading of a gzip encoded initial ramdisk or cpio buffer. + If unsure, say Y. + config CDROM_PKTCDVD tristate "Packet writing on CD/DVD media" depends on !UML |