Message-ID: <3F784188.8030600@euronext.nl>
Date: Mon, 29 Sep 2003 16:28:24 +0200
From: Jan Evert van Grootheest <j.grootheest@euronext.nl>
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To: Arnaldo Carvalho de Melo <acme@conectiva.com.br>
CC: netdev@oss.sgi.com, lksctp-developers@lists.sourceforge.net,
       linux-kernel@vger.kernel.org
Subject: Re: RFC: [2.6 patch] disallow modular IPv6
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Arnaldo,

I guess I am one of those I-wanna-triple-my-kernel-performance-
by-compiling-the-kernel-for-exactly-what-I-have hordes. Although I don't 
think it actually triples my kernel performance ))-:
Those people anyway recompile the kernel if they want some feature 
(un)included.

And I'd say RTM (ah, that should be RTH -- Read The Help) if they don't 
understand it. It's what I do.
I would expect those that know enough to reconfigure the kernel also 
know enough to understand the help that will undoubtedly be provided 
with this option?

-- Jan Evert

Arnaldo Carvalho de Melo wrote:

> Em Mon, Sep 29, 2003 at 10:02:55AM +0100, David Woodhouse escreveu:
>>On Sun, 2003-09-28 at 21:32 -0300, Arnaldo Carvalho de Melo wrote:
>>>Em Mon, Sep 29, 2003 at 02:14:39AM +0200, Adrian Bunk escreveu:
>>>>On Sun, Sep 28, 2003 at 08:39:10PM -0300, Arnaldo Carvalho de Melo wrote:
>>>>What about the following solution (the names and help texts for the
>>>>config options might not be optimal, I hope you understand the
>>>>intention):
>>>>
>>>>config IPV6_SUPPORT
>>>>	bool "IPv6 support"
>>>>
>>>>config IPV6_ENABLE
>>>>	tristate "enable IPv6"
>>>>	depends on IPV6_SUPPORT
>>>>
>>>>IPV6_SUPPORT changes structs etc. and IPV6_ENABLE is responsible for 
>>>>ipv6.o .
>>>
>>>Humm, and the idea is? This seems confusing, could you elaborate on why such
>>>scheme is a good thing?
>>
>>The idea is that you then have ifdefs on CONFIG_IPV6_SUPPORT not on
>>CONFIG_IPV6_MODULE.
> 
> 
> That part I understood :)
>  
> 
>>The underlying point being that your static kernel should not change if
>>you change an option from 'n' to 'm'.
> 
> 
> But that will only happen if CONFIG_IPV6_SUPPORT is always enabled, no?
> 
> 
>>It should only affect the kernel image if you change options to/from 'y'.
> 
> 
> That is a good goal, yes, so lets remove all the ifdefs around EXPORT_SYMBOL,
> etc, i.e.: add bloat for the simple case were I want a minimal kernel.
> 
> Humm, so the user will have, in this case, these choices:
> 
> 1. "I don't want IPV6 at all, not now, not ever":
> 	CONFIG_IPV6_SUPPORT=N
> 	CONFIG_IPV6=N  (this is implicit as this depends on
> 			CONFIG_IPV6_SUPPORT)
> 	
> 2. "I think I may well want it the future, who knows? but not now...":
> 	CONFIG_IPV6_SUPPORT=Y
> 	CONFIG_IPV6=N
> 	
> 3. "Nah, some of the users of this pre-compiled kernel will need it":
> 	CONFIG_IPV6_SUPPORT=Y
> 	CONFIG_IPV6=M
> 	
> 4. "Yeah, IPV6 is COOL, how can somebody not use this piece of art?":
> 	CONFIG_IPV6_SUPPORT=Y
> 	CONFIG_IPV6=Y
> 
> Isn't this confusing for the I-wanna-triple-my-kernel-performance-by-compiling-
> the-kernel-for-exactly-what-I-have hordes of users?
> 
> - Arnaldo
> -
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