Re: [PATCHv3 1/3] x86: use ELF format in compressed images.

Yinghai Lu
2008-04-06T17:19:40Z

On Sun, Apr 6, 2008 at 9:38 AM, H. Peter Anvin <hpa@zytor.com> wrote:
> Yinghai Lu wrote:
>
> > so will cost every bzImage extra memory copy? that could be 18M or
> > even more big.
> >
>
> I wouldn't worry about that. You will typically have several copies of the
> images during the execution of the boot loader.

i put all drivers needed in kernel.
1. bootloader copy bzImage (6M) to memory
2. arch/x86/boot/compressed/head_32.S, will copy bzImage to end of
buffer to do uncompress on possiton.
3. parse_elf will copy the vmlinux (the uncompressed, that is some big, 18M)

I suggest that could have special elf header, and will only have one
PT_LOAD, and avoid the copy, and just offset start address of
uncompressed kernel for jump later.

YH