linux-kernel - Re: [PATCH 00/18] Make common x86 arch area for i386 and x86_64

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Message-ID: <20070314200704.GB376@one.firstfloor.org>
Date:	Wed, 14 Mar 2007 21:07:04 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andi Kleen <andi@...stfloor.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Chris Wright <chrisw@...s-sol.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Glauber de Oliveira Costa <glommer@...il.com>
Subject: Re: [PATCH 00/18] Make common x86 arch area for i386 and x86_64 - Take 2

> the x86_64 and i386 trees have diverged quite a bit though, so this will 
> be a major logistical undertaking. And with Andi opposed to 
> fundamentally it it also lacks a bit of manpower i guess :-/

I'm not fundamentally opposed, just sceptical on the effort:gain ratio.

> Andrew's laptop only half a dozen times! ;) But .. in the long run, it's 
> alot easier to think about unified code. 32-bit x86 will certainly stay 
> with us for at least 10-20 years, and the best model for maintainance is 
> having one codebase.

Not sure -- i'm often glad I don't have to care about all the old 32bit
systems on x86-64. I have no problem with modern 32bit x86 systems,
but old x86 tends to be very different from new x86. And all the old erratas
are scary.

-Andi
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