linux-kernel - Re: [RFC] use realmode code to reserve end-of-conventional-memory to 1MB

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Message-ID: <47CEDAB3.2080404@zytor.com>
Date:	Wed, 05 Mar 2008 09:38:59 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
CC:	Eduardo Habkost <ehabkost@...hat.com>,
	Ian Campbell <ijc@...lion.org.uk>,
	Alexander van Heukelum <heukelum@...lshack.com>,
	Ingo Molnar <mingo@...e.hu>,
	Alexander van Heukelum <heukelum@...tmail.fm>,
	Andi Kleen <ak@...e.de>, Thomas Gleixner <tglx@...utronix.de>,
	Mark McLoughlin <markmc@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [RFC] use realmode code to reserve end-of-conventional-memory
 to 1MB

Jeremy Fitzhardinge wrote:
> H. Peter Anvin wrote:
>> x86 has a number of historical assumptions, both in kernel and in 
>> userspace (consider dmidecode!)  Trying to go against them is a losing 
>> proposition, *AND* a headache for the maintainers, which will have to 
>> consider "oh yes, and Xen does this dumb thing which goes against what 
>> all the hardware does."
> 
> Ahem.  "Hardware does this dumb thing that Xen avoids".  kthxbye ;)

If hardware was trying to emulate Xen, you'd be right.

	-hpa
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