linux-kernel - Re: [PATCH 10/28] i386: map enough initial memory to create lowmem mappings

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Message-ID: <462CF0C5.2040200@zytor.com>
Date:	Mon, 23 Apr 2007 10:45:41 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
CC:	Jeremy Fitzhardinge <jeremy@...p.org>,
	Chuck Ebbert <cebbert@...hat.com>, Andi Kleen <ak@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	virtualization@...ts.osdl.org, lkml <linux-kernel@...r.kernel.org>,
	Zachary Amsden <zach@...are.com>,
	Chris Wright <chrisw@...s-sol.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH 10/28] i386: map enough initial memory to create lowmem
 mappings

Eric W. Biederman wrote:
> 
> - I know of one system that had BIOS tables at 16MB I believe (and
>   thus had a fairly low hole).
> 

Please name names, otherwise this is just rumouring.  Seriously.  We 
have enough cargo-cult programming as it is.

A lot of old ISA systems had an option to put a memory hole at 15-16 MB 
to support ISA video cards with linear frame buffer.  It very rarely got 
used, since VLB took over around the same time.

	-hpa
-
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