Re: 4GB Physical. Less than 3GB in Linux.

[Stefan Richter]

Jeff Chua wrote:
> I've noticed that with 4GB physical ram, I'm only see 3098000 MB on
> the Dell 745, and 3107056MB on the IBM X60s.
> 
> I've tested with CONFIG_HIGHMEM4G=y, CONFIG_HIGHMEM64G=y,
> CONFIG_X86_PAE=y, but nothing makes any difference.
> 
> Tested on Linux 2.6.20, Linux 2.6.21-rc7.

The X60 most certainly contains a chipset which severely limits the
amount of accessible RAM due to issues with remapping of PCIe addresses.
 Intel explains it somewhere on their web presence.  A quick & lazy web
search turned this Intel paper up:
http://www.polywell.com/us/support/faq/4GB_Rev1.pdf
-- 
Stefan Richter
-=====-=-=== -=-- -==-=
http://arcgraph.de/sr/
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