linux-kernel - Re: [PATCH -mm -v2 2/2] i386/x86_64 boot: document for 32 bit boot protocol

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Message-ID: <46F148C2.7020805@zytor.com>
Date:	Wed, 19 Sep 2007 09:05:22 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
CC:	"Huang, Ying" <ying.huang@...el.com>, Andi Kleen <ak@...e.de>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	akpm@...ux-foundation.org, Yinghai Lu <yhlu.kernel@...il.com>,
	Chandramouli Narayanan <mouli@...ux.intel.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH -mm -v2 2/2] i386/x86_64 boot: document for 32 bit boot
 protocol

Alan Cox wrote:
> On Wed, 19 Sep 2007 11:10:28 +0800
> "Huang, Ying" <ying.huang@...el.com> wrote:
> 
>> This patch defines a 32-bit boot protocol and adds corresponding
>> document. It is based on the proposal of Peter Anvin.
>>
>>
>> Known issues:
>>
>> - The hd0_info and hd1_info are deleted from the zero page. Additional
>>   work should be done for this? Or this is unnecessary (because no new
>>   fields will be added to zero page)?
> 
> They aren't actually that useful as for pretty much any 386 or later PC
> we can recover the disk geometry via the BIOS tables, or via EDD. Right
> now we don't save some neccessary fields if using EDD 1.1 but they could
> be saved into the same place EDD 3.0 puts them.
> 

Yeah, I just don't want to remove them from the structure to keep the
locations from getting recycled for a while.

	-hpa
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