contribution in kernel community & testing kernel

contribution in kernel community & testing kernel

[shubham k]

Hi,

I a novice & want to contribute to linux community. I have basic knowledge
of kernel.

Problem statement:
I want to work on x86 architecture. I am not sure how to go about unit
testing. I can use qemu for testing but i find kernel on x86 architecture
too big to compile. How i can get the smaller size kernel on x86
architecture? Please help me setting up testing environment so that i can
test my changes properly & quickly.

thanks,
Shubham
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contribution in kernel community & testing kernel

[Mulyadi Santosa]

On Wed, Mar 23, 2016 at 5:36 PM, shubham k <skaushal.lk@gmail.com> wrote:

> Hi,
>
> I a novice & want to contribute to linux community. I have basic knowledge
> of kernel.
>
> Problem statement:
> I want to work on x86 architecture. I am not sure how to go about unit
> testing. I can use qemu for testing but i find kernel on x86 architecture
> too big to compile. How i can get the smaller size kernel on x86
> architecture? Please help me setting up testing environment so that i can
> test my changes properly & quickly.
>
> thanks,
> Shubham
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
>
If you want smaller kernel size, just avoid compiling modules or kernel
component that you don't need. Things like unneccessary device support,
protocol support are something you can begin with.

Also, once you do:
make

then if later you did modification on certain .c files, then next
invocation of "make" will only recompile the changed .c files. if you need
further speed, use ccache.



-- 
regards,

Mulyadi Santosa
Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com

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contribution in kernel community & testing kernel

[Hao Lee]

On Wed, Mar 23, 2016 at 6:36 PM, shubham k <skaushal.lk@gmail.com> wrote:
> Hi,
>
> I a novice & want to contribute to linux community. I have basic knowledge
> of kernel.
>
> Problem statement:
> I want to work on x86 architecture. I am not sure how to go about unit
> testing. I can use qemu for testing but i find kernel on x86 architecture
> too big to compile. How i can get the smaller size kernel on x86
> architecture? Please help me setting up testing environment so that i can
> test my changes properly & quickly.

Hi,
I once turn off all of the unnecessary options in .config and the
kernel can be compiled within three minutes. But I also remove
USB,Networking,video, and mouse drivers, so the newer kernel is very
tiny and it's useless except debugging.
Besides, I use bochs and gdb to debug kernel source and it's very
convenient. Recently, I find DDD is an awesome debugger, so I highly
recommend it.

Good Luck.
Hao Lee

contribution in kernel community & testing kernel

[Valdis.Kletnieks at vt.edu]

On Wed, 23 Mar 2016 16:06:37 +0530, shubham k said:

> I want to work on x86 architecture. I am not sure how to go about unit
> testing. I can use qemu for testing but i find kernel on x86 architecture
> too big to compile. How i can get the smaller size kernel on x86
> architecture?

'make localmodconfig' is your friend.  Just make sure you plug in all your
USB devices at least once after rebooting, but before running it, so their
modules will be probed - localmodconfig parses (among other things) the
output of lsmod.
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