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Date: Thu, 19 Jul 2012 10:42:17 -0400
From: Steven Rostedt <rostedt@goodmis.org>
To: Borislav Petkov <bp@amd64.org>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>, Pekka Enberg <penberg@kernel.org>,
        richard -rw- weinberger <richard.weinberger@gmail.com>,
        "Myklebust, Trond" <Trond.Myklebust@netapp.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Dave Jones <davej@redhat.com>, Greg Kroah-Hartman <greg@kroah.com>,
        Ubuntu Kernel Team <kernel-team@lists.ubuntu.com>,
        Debian Kernel Team <debian-kernel@lists.debian.org>,
        OpenSUSE Kernel Team <opensuse-kernel@opensuse.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Ingo Molnar <mingo@elte.hu>, Sasha Levin <levinsasha928@gmail.com>,
        Asias He <asias.hejun@gmail.com>
Subject: Re: [opensuse-kernel] Re: [RFC] Simplifying kernel configuration for
 distro issues
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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