linux-kernel - Re: early_res and find_e820

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Message-Id: <200803041246.47737.ak@suse.de>
Date:	Tue, 4 Mar 2008 12:46:47 +0100
From:	Andi Kleen <ak@...e.de>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	"Huang, Ying" <ying.huang@...el.com>,
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org
Subject: Re: early_res and find_e820_area for i386?

On Tuesday 04 March 2008 11:48:53 Ingo Molnar wrote:
> 
> * Andi Kleen <ak@...e.de> wrote:
> 
> > On Tuesday 04 March 2008 04:38:03 Huang, Ying wrote:
> > 
> > > Is it better to implement early_res and find_e820_area on i386? Can 
> > > we trust E820 table on i386?
> > 
> > The 64bit code is certainly more flexible and cleaner, but also much 
> > more complicated.. [...]
> 
> i disagree, the early_res stuff is still quite unclean, 

I was mostly refering to the main e820 allocator.

early_res is just an addon table for kernel internal use. While you
could put that into the main e820 table too if you made that one variable
sized I don't think it would make too much difference either way. 
It's just a minor tweak of the data structure.

-Andi
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