Re: [PATCH 00/14] kconfig: streamline distro configs for testers

From: Ingo Molnar <mingo@elte.hu>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: linux-kernel@vger.kernel.org,
	Andrew Morton <akpm@linux-foundation.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Peter Zijlstra <peterz@infradead.org>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Theodore Tso <tytso@mit.edu>,
	Arjan van de Ven <arjan@infradead.org>, Greg KH <greg@kroah.com>,
	"Luis R. Rodriguez" <mcgrof@gmail.com>,
	zippel@linux-m68k.org, linux-kbuild@vger.kernel.org,
	Sam Ravnborg <sam@ravnborg.org>, Jonathan Corbet <corbet@lwn.net>,
	Alan Jenkins <sourcejedi.lkml@googlemail.com>,
	Andi Kleen <andi@firstfloor.org>
Subject: Re: [PATCH 00/14] kconfig: streamline distro configs for testers
Date: Fri, 21 Aug 2009 21:51:31 +0200	[thread overview]
Message-ID: <20090821195131.GE5356@elte.hu> (raw)
In-Reply-To: <alpine.DEB.2.00.0908211253080.30182@gandalf.stny.rr.com>

* Steven Rostedt <rostedt@goodmis.org> wrote:

> 
> On Fri, 21 Aug 2009, Ingo Molnar wrote:
> 
> > 
> > * Steven Rostedt <rostedt@goodmis.org> wrote:
> > 
> > > 
> > > On Fri, 21 Aug 2009, Steven Rostedt wrote:
> > > > 
> > > > OK, I found the bug. There's a dependency missing.
> > > > 
> > > > $ make localyesconfig
> > > >   HOSTCC  scripts/basic/fixdep
> > > >   HOSTCC  scripts/basic/docproc
> > > >   HOSTCC  scripts/basic/hash
> > > > using config: '/boot/config-2.6.27.25-78.2.56.fc9.x86_64'
> > > > /bin/sh: line 8: scripts/kconfig/conf: No such file or directory
> > > > make[1]: *** [localyesconfig] Error 127
> > > > make: *** [localyesconfig] Error 2
> > > > 
> > > > Thus the script failed to run. But the sed command that converts the '=m' 
> > > > to '=y' still ran. This gives us a distro config with all modules 
> > > > converted to built in!
> > > 
> > > Funny that localmodconfig does not have this bug.
> > 
> > ... add to that i dont use modules much so i probably hit that 
> > localyesconfig bug ;-)
> > 
> > btw: mind adding localrandconfig too? It would be a perfect tool to 
> > randomize all configs except a 'must have' core set of options.
> > 
> > ( Or is this already possible via some existing kconfig feature? I
> >   remember having seen something related, did that ever get
> >   upstream? A quick grep in scripts/ shows nothing but i might have
> >   missed it.)
> 
> OK, I'll add that to my todo list. Note, it the local config is 
> only as good as the starting .config. That is, it never touches =y 
> settings, because it only uses loaded modules as a base. Thus if 
> something is set to =y it will always be set to =y.
> 
> What would you have in mind. Just randomly enabling modules? If we 
> enable a "y" config then the next local*config will still keep 
> that set.

Why - isnt local*config picking up environmental (currently running 
kernel) properties? I.e. it would always set those things that are 
needed - and randomize the rest. Have i misunderstood how it works?

	Ingo