linux-kernel - Re: [opensuse-kernel] Re: [RFC] Simplifying kernel configuration for distro issues

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Date:	Thu, 19 Jul 2012 18:48:07 +0200
From:	Borislav Petkov <bp@...64.org>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Cyrill Gorcunov <gorcunov@...nvz.org>,
	Pekka Enberg <penberg@...nel.org>,
	richard -rw- weinberger <richard.weinberger@...il.com>,
	"Myklebust, Trond" <Trond.Myklebust@...app.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Dave Jones <davej@...hat.com>,
	Greg Kroah-Hartman <greg@...ah.com>,
	Ubuntu Kernel Team <kernel-team@...ts.ubuntu.com>,
	Debian Kernel Team <debian-kernel@...ts.debian.org>,
	OpenSUSE Kernel Team <opensuse-kernel@...nsuse.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>,
	Sasha Levin <levinsasha928@...il.com>,
	Asias He <asias.hejun@...il.com>
Subject: Re: [opensuse-kernel] Re: [RFC] Simplifying kernel configuration for
 distro issues

On Thu, Jul 19, 2012 at 10:42:17AM -0400, Steven Rostedt wrote:
> On Sat, Jul 14, 2012 at 07:48:27PM +0200, Borislav Petkov wrote:
> > 
> > Let's have an example: when I have to build upstream on a distro here,
> > I take the distro config and use it despite that it takes a long time
> > to build since everything is module - it is still better for me to
> > wait that one time instead of doing a dozen of trial and errors after
> > forgetting a config option each time.
> 
> This is where 'make localmodconfig' does help. It can remove a lot of
> modules for you. And I just recently fixed a bug in the tool that it now
> removes even more modules (The fix is in linux-next).

Even more modules? When is enough, enough? :-)

> Also, if you are building on another box than what the kernel is for,
> you can go to that box and run 'lsmod > /tmp/lsmod'. Copy that file to
> the build machine (into /tmp/lsmod), and then run
> 'make LSMOD=/tmp/lsmod localmodconfig', and this will remove the modules
> not used by the target box.

Seriously, this helps only in the cases where the stuff the distro
actually needs is in modules. So, there probably are obscure situations
where you need to enable stuff which is bool and not M. Hopefully those
cases are seldom enough so thanks for this, I'll try that the next time.

-- 
Regards/Gruss,
Boris.

Advanced Micro Devices GmbH
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