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| author | Lasse Collin <lasse.collin@tukaani.org> | 2011-01-13 02:01:24 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-13 17:03:25 +0100 |
| commit | 303148045aac34b70db722a54e5ad94a3a6625c6 (patch) | |
| tree | 9be64b5d44cbef232daf11a89107772cb21647de /arch/x86/include/asm/boot.h | |
| parent | decompressors: add boot-time XZ support (diff) | |
| download | linux-303148045aac34b70db722a54e5ad94a3a6625c6.tar.xz linux-303148045aac34b70db722a54e5ad94a3a6625c6.zip | |
x86: support XZ-compressed kernel
This integrates the XZ decompression code to the x86 pre-boot code.
mkpiggy.c is updated to reserve about 32 KiB more buffer safety margin for
kernel decompression. It is done unconditionally for all decompressors to
keep the code simpler.
The XZ decompressor needs around 30 KiB of heap, so the heap size is
increased to 32 KiB on both x86-32 and x86-64.
Documentation/x86/boot.txt is updated to list the XZ magic number.
With the x86 BCJ filter in XZ, XZ-compressed x86 kernel tends to be a few
percent smaller than the equivalent LZMA-compressed kernel.
Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Alain Knaff <alain@knaff.lu>
Cc: Albin Tonnerre <albin.tonnerre@free-electrons.com>
Cc: Phillip Lougher <phillip@lougher.demon.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86/include/asm/boot.h')
| -rw-r--r-- | arch/x86/include/asm/boot.h | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/arch/x86/include/asm/boot.h b/arch/x86/include/asm/boot.h index 3b62ab56c7a0..5e1a2eef3e7c 100644 --- a/arch/x86/include/asm/boot.h +++ b/arch/x86/include/asm/boot.h @@ -32,11 +32,7 @@ #define BOOT_HEAP_SIZE 0x400000 #else /* !CONFIG_KERNEL_BZIP2 */ -#ifdef CONFIG_X86_64 -#define BOOT_HEAP_SIZE 0x7000 -#else -#define BOOT_HEAP_SIZE 0x4000 -#endif +#define BOOT_HEAP_SIZE 0x8000 #endif /* !CONFIG_KERNEL_BZIP2 */ |