Minimul Config file for Dev Environment

Minimul Config file for Dev Environment

[Jitendra]

Hi Folks,

I usually compile the linux kernel by copying current system .config file. But the
problem it compile bunch things that I don't which is required. My aim
is setup filesystem environmrnt setup on my laptop.

Could somebody point the minimal .config file that will save from me
reading all the options and compile the kernel quickly and test it.

PS: I google it out, but most .config files are very old. I am hoping
somebody helping me for current mainline kernel.

---
Jitendra

Minimul Config file for Dev Environment

[François]

On Sun, Jul 31, 2016 at 01:24:58AM +0530, Jitendra wrote:
> Hi Folks,

Hi!

> I usually compile the linux kernel by copying current system .config file. But the
> problem it compile bunch things that I don't which is required. My aim
> is setup filesystem environmrnt setup on my laptop.
> 
> Could somebody point the minimal .config file that will save from me
> reading all the options and compile the kernel quickly and test it.

I use make default which creates a working .config and then edit it.
You can use qemu (until some point) to make sure the kernel boots.

Good luck!

-- 
Fran?ois

Minimul Config file for Dev Environment

[Greg KH]

On Sun, Jul 31, 2016 at 01:24:58AM +0530, Jitendra wrote:
> Hi Folks,
> 
> I usually compile the linux kernel by copying current system .config file. But the
> problem it compile bunch things that I don't which is required. My aim
> is setup filesystem environmrnt setup on my laptop.
> 
> Could somebody point the minimal .config file that will save from me
> reading all the options and compile the kernel quickly and test it.

'make localmodconfig'

Read the help file for it first, for how to use it properly (i.e. plug
in all devices you want to use on the machine first.)

And a simple 'make help' provides a lot of information, I suggest
reading it as it contains lots of options like this to help you out.

hope this helps,

greg k-h

Minimul Config file for Dev Environment

[Aruna Hewapathirane]

> Hi Folks,

> I usually compile the linux kernel by copying current system .config
file. But the
> problem it compile bunch things that I don't which is required. My aim
> is setup filesystem environmrnt setup on my laptop.

> Could somebody point the minimal .config file that will save from me
> reading all the options and compile the kernel quickly and test it.

1 - Plug in and turn on *all* your external devices, this step is to ensure
that
     the laptop kernel loads all the required modules for your devices.

2 - On the laptop run:
     lsmod > /tmp/jitendra-laptop

     This will store the currently loaded modules in the laptop to the file:
     /tmp/jitendra-laptop

3 - Pass it in as a LSMOD parameter to make:
     make LSMOD=/tmp/jitendra-laptop localmodconfig

4 - Done !

5 - Install ccache. It will improve your build time dramatically. It caches
objects. So it will reduce subsequent builds.

Some interesting history about localmodconfig is here:
http://www.h-online.com/open/features/Good-and-quick-kernel-configuration-creation-1403046.html

Good luck - Aruna
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Minimul Config file for Dev Environment

[Jitendra]

Hi Aruna,

Thanks for descriptive reply. I tried the below steps, but still localmodconfig ask for lots of
configurations, which probably I don't want.

Could you please give some suggestion, that make <config> commands could
be execute without giving any input along with minimual property.

PS: I am using Ubuntu Server 16.04.

---
Jitendra


On 07/30, Aruna Hewapathirane wrote:
>> Hi Folks,
>
>> I usually compile the linux kernel by copying current system .config
>file. But the
>> problem it compile bunch things that I don't which is required. My aim
>> is setup filesystem environmrnt setup on my laptop.
>
>> Could somebody point the minimal .config file that will save from me
>> reading all the options and compile the kernel quickly and test it.
>
>1 - Plug in and turn on *all* your external devices, this step is to ensure
>that
>     the laptop kernel loads all the required modules for your devices.
>
>2 - On the laptop run:
>     lsmod > /tmp/jitendra-laptop
>
>     This will store the currently loaded modules in the laptop to the file:
>     /tmp/jitendra-laptop
>
>3 - Pass it in as a LSMOD parameter to make:
>     make LSMOD=/tmp/jitendra-laptop localmodconfig
>
>4 - Done !
>
>5 - Install ccache. It will improve your build time dramatically. It caches
>objects. So it will reduce subsequent builds.
>
>Some interesting history about localmodconfig is here:
>http://www.h-online.com/open/features/Good-and-quick-kernel-configuration-creation-1403046.html
>
>Good luck - Aruna

Minimul Config file for Dev Environment

[Aruna Hewapathirane]

> Thanks for descriptive reply. I tried the below steps, but still
localmodconfig ask for lots of
> configurations, which probably I don't want.

If you run:

cat /boot/config-`uname -r` | wc -l

That will show you how may kernel configuration options are available on
your active running kernel.

I am runing 4.3.0-rc5-next-20151012 and I have 4225 configuration options.
And the number will keep
increasing with each release as more drivers keep getting added. The kernel
is a moving target :)

> Could you please give some suggestion, that make <config> commands could
> be execute without giving any input along with minimual property.

Sadly there is no quick-fix, you will have to use make menuconfig and go
through and carefully
review what you need and then do the needful. It is a painful and lengthy
process the first time.
But after you have done this then localmodconfig will help.

> PS: I am using Ubuntu Server 16.04.

If there is no specific reason you are using Ubuntu Server 16.04. I would
suggest you try and install Arch Linux.
Arch is definitely not for newbies but their documentation is thorough and
if you have the patience and determination
once all is done you will have gained far more valuable knowledge about the
entire process. There are lot's
of youtube videos on how to install Arch Linux.

Arch Linux defines simplicity as *without unnecessary additions or
modifications*.

Hope this helps - Aruna ( and Jitendra please try not to top post it is
considered impolite by the community )
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