[ltp] Re: Only 3 out of 4 GB detected

[Cherife Li]

On 05/30/08 21:25, Frank Fiene wrote:
> On Freitag 30 Mai 2008, Marcus Better wrote:
>> Stephan Groß wrote:
>>> Please check your model number. AFAIK the 944* and 945* series only
>>> support up to 3 GB. Only the 946* series can be extended to 4 GB.
>> Argh, it's a 9456. :-( Thanks for the info.
>>
>> <rant>
>> What were they thinking? "Nobody is going to need more than 3 GB,
>> right?" </rant>
> 
> It's a problem with PCI bus and this chipset. It doesn't matter if 64bit 
> is installed or 32bit-PAE.
> 
> PCI DMA is shown in the area above 3GB, so also if there is some memory 
> free for instance from 3.5 - 4GB, the chipset cannot use it.
> 
> And funny is: my BIOS (Z61p) says: 4GB!
So, FYI, I suggest you to re-compile the kernel and enable HIGHMEM64G 
support.
> 
> Frauk
-- 
Rgds,
Cherife.