On Tue, 15 Aug 2006 17:49:52 -0400
Vivek Goyal <[email protected]> wrote:
>
> o Currently bss segment is being placed somewhere in the middle (after .data)
> section and after bss lots of init section and data sections are coming.
> Is it intentional?
Not that I know of.
>
> o One side affect of placing bss in the middle is that objcopy keeps the
> bss in raw binary image (vmlinux.bin) hence unnecessarily increasing
> the size of raw binary image. (In my case ~600K). It also increases
> the size of generated bzImage, though the increase is very small
> (896 bytes), probably a very high compression ratio for stream
> of zeros.
>
> o This patch moves the bss at the end hence reducing the size of
> bzImage by 896 bytes and size of vmlinux.bin by 600K.
>
> o This change benefits in the context of relocatable kernel patches. If
> kernel bss is not part of compressed data (vmlinux.bin) then it does
> not have to be decompressed and this area can be used by the decompressor
> for its execution hence keeping the memory requirements bounded and
> decompressor code does not stomp over any other data loaded beyond
> kernel image (As might be the case with bootloaders like kexec).
Merged thanks.
Does i386 need a similar change?
-Andi
-
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