linux-kernel - Re: [PATCH 4/8] x86 boot: allow overlapping ebda and efi memmap memory ranges

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Message-Id: <20080616130938.527283f7.pj@sgi.com>
Date:	Mon, 16 Jun 2008 13:09:38 -0500
From:	Paul Jackson <pj@....com>
To:	"Yinghai Lu" <yhlu.kernel@...il.com>
Cc:	hpa@...or.com, ying.huang@...el.com, mingo@...e.hu,
	tglx@...utronix.de, steiner@....com, travis@....com,
	linux-kernel@...r.kernel.org, andi@...stfloor.org,
	akpm@...ux-foundation.org
Subject: Re: [PATCH 4/8] x86 boot: allow overlapping ebda and efi memmap
 memory ranges

Yinghai wrote:
> like to see to make reserve_ebda_region() more smart like the old
> way when andi introduced ebda_size... instead of reserve 0x9000 to
> 0x100000 all the way.

Looking back at some older kernels, that code seems to have setup an
ebda region only if there was a non-zero real mode pointer at 0x40E.

This is rather different than always setting up such a region.

I would hesitate myself to re-introduce that code, because I know
too little, and have no pressing need for it.

I will leave to others the desirability of such a change.

-- 
                  I won't rest till it's the best ...
                  Programmer, Linux Scalability
                  Paul Jackson <pj@....com> 1.940.382.4214
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