linux-kernel - Re: [patch] x86: allow ZONE

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Message-Id: <20101014123511.d628f873.akpm@linux-foundation.org>
Date:	Thu, 14 Oct 2010 12:35:11 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	Pekka Enberg <penberg@...nel.org>,
	David Rientjes <rientjes@...gle.com>,
	Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Casey Dahlin <cdahlin@...hat.com>, x86@...nel.org,
	linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [patch] x86: allow ZONE_DMA to be configurable

On Thu, 14 Oct 2010 20:34:48 +0200
Ingo Molnar <mingo@...e.hu> wrote:

> 
> * H. Peter Anvin <hpa@...or.com> wrote:
> 
> > On 10/14/2010 09:00 AM, Pekka Enberg wrote:
> >
> > >> CONFIG_EMBEDDED *is* "I am a user who (think I) know what I'm 
> > >> doing". That is *what it is* and *all it is*.
> > > 
> > > Yup. The naming is quite unfortunate, though. Can we change it to 
> > > something else?
> > 
> > Funny, this seems to come up repeatedly ;)
> 
> I'd suggest to rename CONFIG_EMBEDDED=y to CONFIG_EXPERT=y, but i'd also 
> suggest to rename all sub-config-options that depend on CONFIG_EXPERT to 
> have a CONFIG_EXPERT_ prefix.
> 
> So we'd have:
> 
>   CONFIG_EXPERT_CPU_SUP_INTEL=y
>   CONFIG_EXPERT_MMAP_ALLOW_UNINITIALIZED=y
> 
> etc.

yup.  CONFIG_EMBEDDED didn't make a lot of sense even when we first did it. 
I suppose CONFIG_EXPERT is OK, although everyone will select it because
they think they're experts ;)  CONFIG_PROPELLORHEAD!

> That way all the enabled 'expert options' become easily visible in the 
> .config file and they advertise themselves properly - it's also easily 
> greppable. In the source code it also becomes self-documenting, it's 
> obvious when a dependency is 'rare' or 'special' - it has a 
> CONFIG_EXPERT_ prefix.
> 
> Something for the KS i guess.

nah, just do it.
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