linux-kernel - Re: BIOS detects 4 GB RAM, but kernel does not

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Message-id: <44C916DF.6080200@shaw.ca>
Date:	Thu, 27 Jul 2006 13:41:19 -0600
From:	Robert Hancock <hancockr@...w.ca>
To:	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: BIOS detects 4 GB RAM, but kernel does not

Jean-David Beyer wrote:
> You need to compile with
> 
> # CONFIG_NOHIGHMEM is not set
> # CONFIG_HIGHMEM4G is not set
> CONFIG_HIGHMEM64G=y
> CONFIG_HIGHMEM=y
> CONFIG_HIGHPTE=y
> CONFIG_X86_PAE=y
> CONFIG_HIGHIO=y
> CONFIG_X86_4G=y
> CONFIG_X86_SWITCH_PAGETABLES=y
> CONFIG_X86_4G_VM_LAYOUT=y
> CONFIG_X86_UACCESS_INDIRECT=y
> CONFIG_X86_HIGH_ENTRY=y
> 
> in your .config (for *86 machines) to get 4G of user and 4G of system space.
> I so or know how much sense this would make for a 4G of RAM machine. I never
> tried it when this machine had only 4G, but that is what is required to get
> all 4G in a single user process now that I have 8G.

Those options are not applicable on an x86-64 kernel.

-- 
Robert Hancock      Saskatoon, SK, Canada
To email, remove "nospam" from hancockr@...pamshaw.ca
Home Page: http://www.roberthancock.com/

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