linux-kernel - Re: kms in defconfig

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Message-ID: <20090428062924.GA6769@elte.hu>
Date:	Tue, 28 Apr 2009 08:29:24 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Sam Ravnborg <sam@...nborg.org>,
	Steven Rostedt <rostedt@...dmis.org>
Cc:	Tejun Heo <tj@...nel.org>, Dave Airlie <airlied@...il.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: kms in defconfig

* Linus Torvalds <torvalds@...ux-foundation.org> wrote:

> On Tue, 28 Apr 2009, Tejun Heo wrote:
> > 
> > I think defconfig should enable options such that it shows where 
> > upstream kernel is headed, so FWIW +1 for KMS from me.
> 
> I'd actually love to get rid of the stupid defconfig's entirely. 
> They've lost pretty much all relevance over the years, except for 
> specific cases where you might have defconfigs that are for 
> specific platforms.

Yes, exactly. That is the main reason why i NAK-ed a patchset a year 
ago that would have increased the number of defconfigs on x86 
dramatically:

  http://lkml.org/lkml/2008/2/25/86

The defconfig still has some very minimal meaning: i use it for 
example when i create a default config for a new box. It gives a 
reasonable default and then i double-check the lsmod output against 
the .config and add one or two more drivers. [would be nice to have 
that all automatic btw. - a 'make config-for-this-hardware' type of 
kbuild/kconfig thing.]

It is also a good 'middle-ground' config for tests. My tests first 
do a 32-bit defconfig, then a 64-bit defconfig, then allno, allyes, 
allmod. The defconfig builds quickly so often i can see problems 
based on those first iterations already.

	Ingo
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