linux-kernel - Re: [PATCH] default to n for GROUP_SCHED and FAIR_GROUP

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Date:	Mon, 5 May 2008 21:01:45 +0200
From:	Sam Ravnborg <sam@...nborg.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Parag Warudkar <parag.warudkar@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	"akpm@...l.org" <akpm@...l.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Dave Jones <davej@...hat.com>
Subject: Re: [PATCH] default to n for GROUP_SCHED and FAIR_GROUP_SCHED

On Mon, May 05, 2008 at 08:42:35PM +0200, Ingo Molnar wrote:
> 
> * Sam Ravnborg <sam@...nborg.org> wrote:
> 
> > > This is a many years old kconfig bug that is frequently hacked 
> > > around in distro kernel packages but which has been ignored upstream 
> > > - i've attached Fedora's nonint_oldconfig patch from Dave Jones 
> > > below. (maybe Arjan wrote it originally?)
> > 
> > In latest kbuild.git I've added a new feature.
> > 
> > 	make K=.config alldefconfig
> > 
> > would give you eaxtly what you request here. K= is used to say where 
> > to locate the base-configuration.
> 
> great, thanks Sam!
> 
> ( how hard would it be to fix the "make oldconfig < /dev/null" infinit 
>   loop bug btw? I've got this method in a number of scripts of mine and 
>   it's an intuitive thing to type anyway, i think users would like it if 
>   it Just Worked. )

Let me try (on my i386 box so I use x86_&4 so I know oldconfig will ask):
$ make defconfig ARCH=x86_64
#
# configuration is based on '/home/sam/kernel/kbuild.git/arch/x86/configs/x86_64_defconfig'
#
# configuration written to .config
#
$ make oldconfig > /dev/null
aborted!

Console input/output is redirected. Run 'make oldconfig' to update configuration.

make[1]: *** [oldconfig] Error 1
make: *** [oldconfig] Error 2



And then with a config that does not need an update:
$ make defconfig
#
# configuration is based on '/home/sam/kernel/kbuild.git/arch/x86/configs/i386_defconfig'
#
# configuration written to .config
#
$ make oldconfig > /dev/null
$

Seems like I already fixed it :-)
That was a side-effect of touching some code in conf.c

Note by the way the output of 'make oldconfig' - nada.
I simply dropped the chatty mode as noone used it
for anything sensible anymore.

	Sam
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