linux-kernel - Re: increase Linux kernel address space 3.5 G memory on Redhat Enterprise version 4

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Message-ID: <20070509012124.GJ19966@holomorphy.com>
Date:	Tue, 8 May 2007 18:21:24 -0700
From:	William Lee Irwin III <wli@...omorphy.com>
To:	Minchen Zhao <mzhao@...otech-inc.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: increase Linux kernel address space 3.5 G memory on Redhat Enterprise version 4

On Tue, May 08, 2007 at 05:21:01PM -0700, Minchen Zhao wrote:
> I am running Redhat Linux Enterprise version 4 update 4 on a dual-core 
> 4G memory machine.
> There are many references on the web talking about increasing default 
> user address space
> to 3.5 G however lacking specific instrcutions. My questions:
> 1. What is the specific steps to be done for the kernel to support 3.5 G 
> address space?
> 2. Do I need to re-compile kernel to make this happen? If so, any 
> specific instruction?
> thanks in advance.
> P.S. Please cc to me (mzhao@...otech-inc.com) to reply.

Use the hugemem kernel instead of the smp kernel. You will get > 3.5GB
user address space.


-- wli
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