linux-kernel - RE: [RFC][PATCH] Cross Memory Attach

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Message-ID: <SNT125-W404716E1C7DD1F32AA10AFC37D0@phx.gbl>
Date:	Sat, 18 Sep 2010 21:44:25 -0700
From:	Yuhong Bao <yuhongbao_386@...mail.com>
To:	<torvalds@...ux-foundation.org>, <peterz@...radead.org>
CC:	<cyeoh@....ibm.com>, <linux-kernel@...r.kernel.org>
Subject: RE: [RFC][PATCH] Cross Memory Attach



> On Thu, Sep 16, 2010 at 10:54 AM, Linus Torvalds
>  wrote:
> > But there is no way I'm
> > going to say "oh, HIGHMEM still makes sense in 2010 because the ARM
> > guys are now making all the same mistakes Intel did in 1992".
>
> Off by a couple of years. Intel did it wit the PPro, in 1995,
> actually. But it's still going to be 16 years later by the time ARM
> LPAE actually ships, I guess.

Yep, back when the 386 was designed, having 4GB for both physical and virtual address space
(which was what caused HIGHMEM to be needed at all with more than 1GB in the first place)
was not a mistake.
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