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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-08-03 16:03:23 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-08-03 16:03:23 -0700 |
| commit | c0dfadfed87489fa6126ece161a14c2d15dbdc79 (patch) | |
| tree | 2b1ac3fb464e4d18b57e3d4735cd6b60454cc972 /usr/Kconfig | |
| parent | ba77c568f3160657a5f7905289c07d18c2dfde78 (diff) | |
| parent | 1ac1efa5f6950f8f126f2c1921bb699ce009ec7d (diff) | |
Merge tag 'x86-boot-2020-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 boot updates from Ingo Molnar:
"The main change in this cycle was to add support for ZSTD-compressed
kernel and initrd images.
ZSTD has a very fast decompressor, yet it compresses better than gzip"
* tag 'x86-boot-2020-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
Documentation: dontdiff: Add zstd compressed files
.gitignore: Add ZSTD-compressed files
x86: Add support for ZSTD compressed kernel
x86: Bump ZO_z_extra_bytes margin for zstd
usr: Add support for zstd compressed initramfs
init: Add support for zstd compressed kernel
lib: Add zstd support to decompress
lib: Prepare zstd for preboot environment, improve performance
Diffstat (limited to 'usr/Kconfig')
| -rw-r--r-- | usr/Kconfig | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/usr/Kconfig b/usr/Kconfig index 96afb03b65f9..2599bc21c1b2 100644 --- a/usr/Kconfig +++ b/usr/Kconfig @@ -100,6 +100,15 @@ config RD_LZ4 Support loading of a LZ4 encoded initial ramdisk or cpio buffer If unsure, say N. +config RD_ZSTD + bool "Support initial ramdisk/ramfs compressed using ZSTD" + default y + depends on BLK_DEV_INITRD + select DECOMPRESS_ZSTD + help + Support loading of a ZSTD encoded initial ramdisk or cpio buffer. + If unsure, say N. + choice prompt "Built-in initramfs compression mode" depends on INITRAMFS_SOURCE != "" @@ -196,6 +205,17 @@ config INITRAMFS_COMPRESSION_LZ4 If you choose this, keep in mind that most distros don't provide lz4 by default which could cause a build failure. +config INITRAMFS_COMPRESSION_ZSTD + bool "ZSTD" + depends on RD_ZSTD + help + ZSTD is a compression algorithm targeting intermediate compression + with fast decompression speed. It will compress better than GZIP and + decompress around the same speed as LZO, but slower than LZ4. + + If you choose this, keep in mind that you may need to install the zstd + tool to be able to compress the initram. + config INITRAMFS_COMPRESSION_NONE bool "None" help |