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SubjectRe: kernel size
On Wed, 10 Oct 2001, Keith Owens wrote:

> On Tue, 9 Oct 2001 11:53:48 -0400 (EDT),
> "Richard B. Johnson" <root@chaos.analogic.com> wrote:
> >Yes. It shows in /proc/kcore. Just wasted. It does mean something
> >on an embedded system.
>
> kcore shows all the kernel buffers, including user space stuff being
> processed by the loader. My tests show that all the strings that you
> are complaining about have been stripped from the kernel before it is
> loaded.
>

Yes... but. The final test was using bzImage which became about 1k
shorter after making the changes to vmlinux.lds.

total 748
drwxr-xr-x 4 root 101 4096 Oct 9 13:49 .
drwxr-xr-x 7 root 101 4096 Jan 11 2001 ..
-rw-r--r-- 1 root 101 2799 Dec 20 1999 Makefile
-rwxr-xr-x 1 root root 512 Oct 9 13:32 bbootsect
-rw-r--r-- 1 root root 2352 Oct 9 13:32 bbootsect.o
-rw-r--r-- 1 root root 7981 Oct 9 13:32 bbootsect.s
-rw-r--r-- 1 root 101 9644 Jan 29 2001 bootsect.S
-rwxr-xr-x 1 root root 4501 Oct 9 13:49 bsetup
-rw-r--r-- 1 root root 11704 Oct 9 13:49 bsetup.o
-rw-r--r-- 1 root root 44212 Oct 9 13:49 bsetup.s
-rw-r--r-- 1 root root 575432 Oct 9 13:49 bzImage
-rw-r--r-- 1 root root 581384 Oct 1 13:27 bzImage.OLD
drwxr-xr-x 2 root 101 4096 Oct 9 13:49 compressed
-rw-r--r-- 1 root 101 904 Jan 3 1995 install.sh
-rw-r--r-- 1 root 101 23458 Jan 27 2001 setup.S
drwxr-xr-x 2 root 101 4096 Oct 9 13:32 tools
-rw-r--r-- 1 root 101 39023 Nov 21 1999 video.S


The size change of the raw image is even more evident:

-rwxr-xr-x 1 root root 1548916 Oct 9 13:49 vmlinux
-rwxr-xr-x 1 root root 1590692 Oct 1 13:26 vmlinux.OLD


I did not look at any other scripts that are involved in making
the image.

Also I was not complaining about anything. One respondent noted
that compiling the kernel with a new 'C' compiler resulted in
a large increase in kernel size. Some of us then attempted to
find out simple ways to get the kernel size back down. I showed
that some 'C' compiler versions have enormous ID strings that
are wasting space. I also mentioned that some versions align
everything on 16-byte boundaries and there doesn't seem to
be any way to turn off this 'feature'.

Cheers,
Dick Johnson

Penguin : Linux version 2.4.1 on an i686 machine (799.53 BogoMips).

I was going to compile a list of innovations that could be
attributed to Microsoft. Once I realized that Ctrl-Alt-Del
was handled in the BIOS, I found that there aren't any.


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