slim kernel source

slim kernel source

[Dan Bethe]

Hi all.  Is there a utility or procedure which can remove a bunch of the code
from extraneous architectures from my kernel source tree?  I only want to build
kernels for my beloved Powermac 8500 and so I can do without code specific to
ia32, S390, Alpha, MIPS, and friends.

Even if you just know of a few directories I can remove and save a couple dozen
megs of space, that'd be good.

Thanks!


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Re: slim kernel source

[Michel Lanners]

On  27 Mar, this message from Dan Bethe echoed through cyberspace:
> Hi all.  Is there a utility or procedure which can remove a bunch of the code
> from extraneous architectures from my kernel source tree?  I only want to build
> kernels for my beloved Powermac 8500 and so I can do without code specific to
> ia32, S390, Alpha, MIPS, and friends.

Hmmm...

> Even if you just know of a few directories I can remove and save a couple dozen
> megs of space, that'd be good.

A random benh 2.4 kernel tree has 127 MB once de-tgz'ed. Of these, 69 MB
are drivers, for which it is difficult to know what you need and what
you don't need. Removing random stuff in there might break the kernel
Makefiles, too.

Which leaves arch/ (22 MB) and include/ (15 MB). In arch, 2.6 MB is ppc/
(not one of the leaner arch'es :-), but there have been cases of one
arch relying on code of some other arch.

In include/, the asm-* part is roughly 10 MB, of which asm-ppc eats
600K. Again, the caveat about dependencies between arch'es apply.

In general, the kernel sources are not meant to be cut in pieces. You
can certainly remove large parts, but you're on your own if anything
breaks.

Cheers

Michel

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Re: slim kernel source

[Ethan Benson]

On Wed, Mar 27, 2002 at 10:30:28AM -0800, Dan Bethe wrote:
>
> Hi all.  Is there a utility or procedure which can remove a bunch of the code
> from extraneous architectures from my kernel source tree?  I only want to build
> kernels for my beloved Powermac 8500 and so I can do without code specific to
> ia32, S390, Alpha, MIPS, and friends.
>
> Even if you just know of a few directories I can remove and save a couple dozen
> megs of space, that'd be good.

you can probably safly rm -rf everything under arch/* except arch/ppc
and include/asm-* except include/asm-ppc.  i haven't tried this but i
would expect this not to break anything (and if it does thats probably
a bug).

--
Ethan Benson
http://www.alaska.net/~erbenson/

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Re: slim kernel source

[Geert Uytterhoeven]

On Wed, 27 Mar 2002, Dan Bethe wrote:
> Hi all.  Is there a utility or procedure which can remove a bunch of the code
> from extraneous architectures from my kernel source tree?  I only want to build
> kernels for my beloved Powermac 8500 and so I can do without code specific to
> ia32, S390, Alpha, MIPS, and friends.
>
> Even if you just know of a few directories I can remove and save a couple dozen
> megs of space, that'd be good.

You can remove everything under arch/ and include/ you don't need. But you'll
be very disappointed when you notice that you haven't saved a couple dozen megs
of space by doing that. The arch-specific code is _very_ small compared to all
the driver code, which is valid for most architectures.

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds


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Re: slim kernel source

[Hollis Blanchard]

On Thu, 2002-03-28 at 03:16, Ethan Benson wrote:
>
> On Wed, Mar 27, 2002 at 10:30:28AM -0800, Dan Bethe wrote:
> >
> > Hi all.  Is there a utility or procedure which can remove a bunch of the code
> > from extraneous architectures from my kernel source tree?  I only want to build
> > kernels for my beloved Powermac 8500 and so I can do without code specific to
> > ia32, S390, Alpha, MIPS, and friends.
> >
> > Even if you just know of a few directories I can remove and save a couple dozen
> > megs of space, that'd be good.
>
> you can probably safly rm -rf everything under arch/* except arch/ppc
> and include/asm-* except include/asm-ppc.  i haven't tried this but i
> would expect this not to break anything (and if it does thats probably
> a bug).

As I recall, LinuxPPC 2000 shipped kernel source like this (without
testing ;), and a few PPC headers include m68k headers.

-Hollis


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