Re: lost memory on a 4GB amd64

[Sergei Haller]

On Thu, 16 Sep 2004, Andi Kleen (AK) wrote:

AK> Sergei Haller <Sergei.Haller@xxxxxxxxxxxxxxxxxxx> writes:
AK> 
AK> > the problem is that about 512 MB of that memory is lost (AGP aperture and 
AK> > stuff). Although everything is perfect otherwise.
AK> > As far as I understand, all the PCI/AGP hardware uses the top end of the 
AK> > 4GB address range to access their memory and there is just an 
AK> > "overlapping" of the addresses. thus only the remaining 3.5 GB are 
AK> > available.
AK> 
AK> It's a BIOS issue. Nothing the kernel can do about it. You are 
AK> talking to the wrong people.

Hi Andi,

I am sure you did read the rest of my mail, didn't you? I mean the part 
where I describe that there is an option in the BIOS for that but the 
kernel crashes if I enable it.

If it is still a problem of the BIOS, could you please be more specific 
about what exactly is the problem with the BIOS?


Thanks,
        Sergei
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