Date: Thu, 24 Jul 2003 00:27:47 +0200
From: Willy Tarreau <willy@w.ods.org>
To: Bernardo Innocenti <bernie@develer.com>
Cc: Christoph Hellwig <hch@lst.de>,
       uClinux development list <uclinux-dev@uclinux.org>,
       linux-kernel@vger.kernel.org
Subject: Re: [uClinux-dev] Kernel 2.6 size increase
Message-ID: <20030723222747.GF643@alpha.home.local>
References: <200307232046.46990.bernie@develer.com> <20030723193246.GA836@lst.de> <200307232357.25128.bernie@develer.com> <200307240007.15377.bernie@develer.com>
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Hi !

On Thu, Jul 24, 2003 at 12:07:15AM +0200, Bernardo Innocenti wrote:
 
>    text    data     bss     dec     hex filename
>  633028   37952  134260  805240   c4978 linux-2.4.x/linux-Os
>  819276   52460   78896  950632   e8168 linux-2.5.x/vmlinux-inline-Os
>  ^^^^^^
>        2.6 still needs a hard diet... :-/

I did the same observation a few weeks ago on 2.5.74/gcc-2.95.3. I tried
to track down the responsible, to the point that I completely disabled every
driver, networking option and file-system, just to see, and got about a 550 kB
vmlinux compiled with -Os. 550 kB for nothing :-(

I don't have the config nor the exact numbers right here now, but I can
redo the tests on 2.6.0-test1 if needed.

I was interested in using a very minimal pre-boot kernel with kexec which would
automatically select a valid image among several ones. But 500 kB overhead for
a boot loader quickly refrained me...

Cheers,
Willy

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