[Buildroot] kernel size

[Buildroot] kernel size

[steve caster]

Hi all,

 

I am trying to build a kernel with buildroot and are using a separate
.config file which I made myself. The kernel is working, yet is about 90MB
is size. This is unbelievable as I nearly don't have any modules. What could
make is so big?

I have module support enabled and most of my drivers are compiled as
modules. I don't get the issues. When I look at what it is compiling it is
as if it is compiling everything in it.

Any ideas?

 

Best regards

Steve

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[Buildroot] kernel size

[Peter Korsgaard]

>>>>> "steve" == steve caster <steve@c2root.be> writes:

 steve> Hi all,

 steve> I am trying to build a kernel with buildroot and are using a
 steve> separate .config file which I made myself. The kernel is
 steve> working, yet is about 90MB is size.  This is unbelievable as I
 steve> nearly don?t have any modules. What could make is so big?

Hard to know without any more details. How big is the kernel if you
compile it by hand with the buildroot cross compiler? What platform,
what is your buildroot and kernel .config's?

-- 
Bye, Peter Korsgaard

[Buildroot] kernel size

[steve at c2root.be]

Hi all,

I have fixed. It had to do with the initramfs being enabled. So this  
was built inside the kernel. Once I removed that option, my kernel was  
again 1.5 MB

regards
Steve
Quoting Peter Korsgaard <jacmet@uclibc.org>:

>>>>>> "steve" == steve caster <steve@c2root.be> writes:
>
>  steve> Hi all,
>
>  steve> I am trying to build a kernel with buildroot and are using a
>  steve> separate .config file which I made myself. The kernel is
>  steve> working, yet is about 90MB is size.  This is unbelievable as I
>  steve> nearly don?t have any modules. What could make is so big?
>
> Hard to know without any more details. How big is the kernel if you
> compile it by hand with the buildroot cross compiler? What platform,
> what is your buildroot and kernel .config's?
>
> --
> Bye, Peter Korsgaard
>



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[Buildroot] kernel size

[Thomas Petazzoni]

Le Sun, 2 Nov 2008 23:10:37 +0100,
"steve caster" <steve@c2root.be> a ?crit :

> I am trying to build a kernel with buildroot and are using a separate
> .config file which I made myself. The kernel is working, yet is about
> 90MB is size. This is unbelievable as I nearly don't have any
> modules. What could make is so big?

By chance, aren't you using an initramfs, included in the kernel, which
contains your root filesystem ? That could easily explain the large
size of your kernel image.

This is something that is done automatically by Buildroot if you
enabled BR2_TARGET_ROOTFS_INITRAMFS.

Sincerly,

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers and embedded Linux development,
consulting, training and support.
http://free-electrons.com

[Buildroot] kernel size

[Ivan Kuten]

Please search mailing list archive,
There was similar problem.
The issue was in binutils and linux-kernel version incompatibility.

Regards,
Ivan

> Le Sun, 2 Nov 2008 23:10:37 +0100,
> "steve caster" <steve@c2root.be> a ?crit :
> 
>> I am trying to build a kernel with buildroot and are using a separate
>> .config file which I made myself. The kernel is working, yet is about
>> 90MB is size. This is unbelievable as I nearly don't have any
>> modules. What could make is so big?
> 
> By chance, aren't you using an initramfs, included in the kernel, which
> contains your root filesystem ? That could easily explain the large
> size of your kernel image.
> 
> This is something that is done automatically by Buildroot if you
> enabled BR2_TARGET_ROOTFS_INITRAMFS.
> 
> Sincerly,
> 
> Thomas