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
Date: Wed, 5 Mar 2003 04:26:54 -0800 [thread overview]
Message-ID: <20030305122654.GR1195@holomorphy.com> (raw)
In-Reply-To: <9EFD49E2FB59D411AABA0008C7E675C00DCDFE01@emss04m10.ems.lmco.com>
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
next prev parent reply other threads:[~2003-03-05 12:16 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-05 11:28 High Mem Options Reed, Timothy A
2003-03-05 12:11 ` Michael Vergoz
2003-03-05 13:36 ` Alan Cox
2003-03-05 12:49 ` Michael Vergoz
2003-03-05 12:57 ` William Lee Irwin III
2003-03-05 13:02 ` Michael Vergoz
2003-03-05 13:10 ` William Lee Irwin III
2003-03-09 2:41 ` Bill Davidsen
2003-03-05 14:21 ` Alan Cox
2003-03-05 12:26 ` William Lee Irwin III [this message]
2003-03-05 20:31 ` Gerrit Huizenga
2003-03-05 20:58 ` William Lee Irwin III
2003-03-05 21:11 ` Gerrit Huizenga
2003-03-05 21:34 ` Martin J. Bligh
2003-03-05 13:38 ` Alan Cox
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