Author: Jonathan Hudson Date: To: hampshire Subject: Re: [Hampshire] 4GB on AMD64
On Sun, 3 Jan 2010 16:41:00 +0000
Samuel Penn <sam@???> wrote:
>
> Hi all,
>
> Does anyone have any ideas what needs to be done to get Linux to
> recognise 4GB of RAM? I've got a box running 64bit Gentoo Linux (AMD),
> which I've just upgraded to 4GB, however Linux is only showing 3GB
> available (according to top).
>
> The machine's BIOS is displaying 4GB installed, it's just Linux that
> only seems to see 3GB.
>
> Thanks,
> Sam.
Had the same problem some years ago, when I went 64bit/4GB; it was a
BIOS issue. Can't remember exactly what (and would have been BIOS
specific), may have been something to do with a memory hole or
remapping PCI address space or something equally bizarre.
