Add LZO compression support for initramfs and old-style initrd

[pandora-kernel.git] / usr / Kconfig

diff --git a/usr/Kconfig b/usr/Kconfig
index 1c3039f..e2721f5 100644 (file)
--- a/usr/Kconfig
+++ b/usr/Kconfig
@@ -72,6 +72,15 @@ config RD_LZMA
          Support loading of a LZMA encoded initial ramdisk or cpio buffer
          If unsure, say N.
 
+config RD_LZO
+       bool "Support initial ramdisks compressed using LZO" if EMBEDDED
+       default !EMBEDDED
+       depends on BLK_DEV_INITRD
+       select DECOMPRESS_LZO
+       help
+         Support loading of a LZO encoded initial ramdisk or cpio buffer
+         If unsure, say N.
+
 choice
        prompt "Built-in initramfs compression mode" if INITRAMFS_SOURCE!=""
        help
@@ -108,16 +117,15 @@ config INITRAMFS_COMPRESSION_GZIP
        bool "Gzip"
        depends on RD_GZIP
        help
-         The old and tried gzip compression. Its compression ratio is
-         the poorest among the 3 choices; however its speed (both
-         compression and decompression) is the fastest.
+         The old and tried gzip compression. It provides a good balance
+         between compression ratio and decompression speed.
 
 config INITRAMFS_COMPRESSION_BZIP2
        bool "Bzip2"
        depends on RD_BZIP2
        help
          Its compression ratio and speed is intermediate.
-         Decompression speed is slowest among the three.  The initramfs
+         Decompression speed is slowest among the four.  The initramfs
          size is about 10% smaller with bzip2, in comparison to gzip.
          Bzip2 uses a large amount of memory. For modern kernels you
          will need at least 8MB RAM or more for booting.
@@ -128,7 +136,15 @@ config INITRAMFS_COMPRESSION_LZMA
        help
          The most recent compression algorithm.
          Its ratio is best, decompression speed is between the other
-         two. Compression is slowest.  The initramfs size is about 33%
+         three. Compression is slowest. The initramfs size is about 33%
          smaller with LZMA in comparison to gzip.
 
+config INITRAMFS_COMPRESSION_LZO
+       bool "LZO"
+       depends on RD_LZO
+       help
+         Its compression ratio is the poorest among the four. The kernel
+         size is about about 10% bigger than gzip; however its speed
+         (both compression and decompression) is the fastest.
+
 endchoice