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Date: Wed, 5 Mar 2003 04:26:54 -0800
From: William Lee Irwin III <wli@holomorphy.com>
To: "Reed, Timothy A" <timothy.a.reed@lmco.com>
Cc: "Linux Kernel ML (E-mail)" <linux-kernel@vger.kernel.org>
Subject: Re: High Mem Options
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On Wed, Mar 05, 2003 at 06:28:36AM -0500, Reed, Timothy A wrote:
> 	Yet another quick question...is there any down side to using the
> 64GB option over the 4GB option if the machine only has 2GB of RAM onboard??
> I would think this would be a performance issue?  Does the kernel only use
> the translation table if it has to access any memory location over 4GB?

Yes, the additional level of pagetables slows things down quite a bit.


-- wli
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