linux-kernel - Re: mainlining min-configs...

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Message-ID: <20080610190530.GH11685@cs181133002.pp.htv.fi>
Date:	Tue, 10 Jun 2008 22:05:30 +0300
From:	Adrian Bunk <bunk@...nel.org>
To:	Sam Ravnborg <sam@...nborg.org>
Cc:	Tim Bird <tim.bird@...sony.com>, Rob Landley <rob@...dley.net>,
	linux-tiny <Linux-tiny@...enic.com>,
	linux-embedded <linux-embedded@...r.kernel.org>,
	linux kernel <linux-kernel@...r.kernel.org>
Subject: Re: mainlining min-configs...

On Tue, Jun 10, 2008 at 08:51:23PM +0200, Sam Ravnborg wrote:
> On Tue, Jun 10, 2008 at 09:30:04PM +0300, Adrian Bunk wrote:
> > On Tue, Jun 10, 2008 at 11:18:30AM -0700, Tim Bird wrote:
> > > Adrian Bunk wrote:
> > >...
> > > > You need both, and ideally constantly done by the same person against 
> > > > Linus' tree, -next and -mm.
> > > > 
> > > > Where to get your minimal configs from at the start is just a small 
> > > > thing at the beginning - don't underestimate the required manual work 
> > > > that will have to be done each week.
> > > 
> > > This is probably why I haven't signed up for this myself previously.
> > > I'd be interested in finding out the rate at which defconfigs
> > > bitrot in mainline.  My experience is that usually a 'make oldconfig'
> > > will produce something usable.  But maybe that wouldn't be as
> > > effective with a minconfig?
> > >...
> > 
> > Someone has to run the 'make oldconfig' for all configs...
> > 
> > And no, you cannot get that completely automated.
> 
> When I get my kconfig patchset polished you will be able to do:
> 
> make K=my_mini_config allnoconfig

  make KCONFIG_ALLCONFIG=my_mini_config allnoconfig

already does the same.

> Thus selecting 'no' for all new symbols in an automated fashion.
> I know that in a few cases 'no' is the wrong answer but in the
> 99% of the cases 'no' is perfectly valid.

The 1% contain cases like e.g. a kconfig variable you need getting
a new dependency.

> 	Sam

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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