aboutsummaryrefslogtreecommitdiffstats
path: root/usr/Kconfig
diff options
context:
space:
mode:
authorAlbin Tonnerre <albin.tonnerre@free-electrons.com>2010-01-08 17:42:46 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2010-01-11 12:34:05 -0500
commitcacb246f8db2b9eba89d44a0f0dd4f6ed93bc113 (patch)
tree8fff3df983d02c362ba90b334b77a7a93315455e /usr/Kconfig
parent13510997d600a076e064f10587a8f6d20f8fff41 (diff)
Add LZO compression support for initramfs and old-style initrd
Signed-off-by: Albin Tonnerre <albin.tonnerre@free-electrons.com> Tested-by: Wu Zhangjin <wuzhangjin@gmail.com> Acked-by: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Tested-by: Russell King <rmk@arm.linux.org.uk> Acked-by: Russell King <rmk@arm.linux.org.uk> Cc: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'usr/Kconfig')
-rw-r--r--usr/Kconfig26
1 files changed, 21 insertions, 5 deletions
diff --git a/usr/Kconfig b/usr/Kconfig
index 1c3039f28909..e2721f5a3504 100644
--- a/usr/Kconfig
+++ b/usr/Kconfig
@@ -72,6 +72,15 @@ config RD_LZMA
72 Support loading of a LZMA encoded initial ramdisk or cpio buffer 72 Support loading of a LZMA encoded initial ramdisk or cpio buffer
73 If unsure, say N. 73 If unsure, say N.
74 74
75config RD_LZO
76 bool "Support initial ramdisks compressed using LZO" if EMBEDDED
77 default !EMBEDDED
78 depends on BLK_DEV_INITRD
79 select DECOMPRESS_LZO
80 help
81 Support loading of a LZO encoded initial ramdisk or cpio buffer
82 If unsure, say N.
83
75choice 84choice
76 prompt "Built-in initramfs compression mode" if INITRAMFS_SOURCE!="" 85 prompt "Built-in initramfs compression mode" if INITRAMFS_SOURCE!=""
77 help 86 help
@@ -108,16 +117,15 @@ config INITRAMFS_COMPRESSION_GZIP
108 bool "Gzip" 117 bool "Gzip"
109 depends on RD_GZIP 118 depends on RD_GZIP
110 help 119 help
111 The old and tried gzip compression. Its compression ratio is 120 The old and tried gzip compression. It provides a good balance
112 the poorest among the 3 choices; however its speed (both 121 between compression ratio and decompression speed.
113 compression and decompression) is the fastest.
114 122
115config INITRAMFS_COMPRESSION_BZIP2 123config INITRAMFS_COMPRESSION_BZIP2
116 bool "Bzip2" 124 bool "Bzip2"
117 depends on RD_BZIP2 125 depends on RD_BZIP2
118 help 126 help
119 Its compression ratio and speed is intermediate. 127 Its compression ratio and speed is intermediate.
120 Decompression speed is slowest among the three. The initramfs 128 Decompression speed is slowest among the four. The initramfs
121 size is about 10% smaller with bzip2, in comparison to gzip. 129 size is about 10% smaller with bzip2, in comparison to gzip.
122 Bzip2 uses a large amount of memory. For modern kernels you 130 Bzip2 uses a large amount of memory. For modern kernels you
123 will need at least 8MB RAM or more for booting. 131 will need at least 8MB RAM or more for booting.
@@ -128,7 +136,15 @@ config INITRAMFS_COMPRESSION_LZMA
128 help 136 help
129 The most recent compression algorithm. 137 The most recent compression algorithm.
130 Its ratio is best, decompression speed is between the other 138 Its ratio is best, decompression speed is between the other
131 two. Compression is slowest. The initramfs size is about 33% 139 three. Compression is slowest. The initramfs size is about 33%
132 smaller with LZMA in comparison to gzip. 140 smaller with LZMA in comparison to gzip.
133 141
142config INITRAMFS_COMPRESSION_LZO
143 bool "LZO"
144 depends on RD_LZO
145 help
146 Its compression ratio is the poorest among the four. The kernel
147 size is about about 10% bigger than gzip; however its speed
148 (both compression and decompression) is the fastest.
149
134endchoice 150endchoice