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

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Date:	Thu, 19 Jul 2012 10:42:17 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Borislav Petkov <bp@...64.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 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).

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.

-- Steve

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