Messages in this thread | | | Date | Sun, 6 Apr 2008 10:34:30 -0700 | From | "Yinghai Lu" <> | Subject | Re: [PATCHv3 1/3] x86: use ELF format in compressed images. |
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On Sun, Apr 6, 2008 at 10:25 AM, H. Peter Anvin <hpa@zytor.com> wrote: > > Yinghai Lu wrote: > > > 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. > > > > Once again, I think you will have a hard time measuring the time > difference.
ok.
forget about my proposal..
YH
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