Re: Only 3.2G ram out of 4G seen in an i386 box

[Simen Thoresen <simentt@dolphinics.no>]

gmu 2k6 wrote:
> On 8/10/06, Simen Thoresen <simentt@dolphinics.no> wrote:
>> gmu 2k6 wrote:
>> ...
>> > so what does it mean that one of Xeons here shows me the full 4GiB as
>> > total physical memory via `free`?
>> >
>> Just out of interest - what chipset does your Xeon system use?
> 
> lspci of the P4 32bit desktop with 3GiB
> 00:00.0 Host bridge: Intel Corporation 82875P/E7210 Memory Controller
> Hub (rev 02)
> 00:01.0 PCI bridge: Intel Corporation 82875P Processor to AGP
> Controller (rev 02)
> 00:1d.0 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB
> UHCI Controller #1 (rev 02)
> 
> lspci of the Xeon 32bit HP Proliant Server with 4GiB:
> 00:00.0 Host bridge: Intel Corporation E7520 Memory Controller Hub (rev 0c)
> 00:02.0 PCI bridge: Intel Corporation E7525/E7520/E7320 PCI Express
> Port A (rev 0c)
> 00:06.0 PCI bridge: Intel Corporation E7520 PCI Express Port C (rev 0c)
> 00:1d.0 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB
> UHCI Controller #1 (rev 02)

We know the E7520 is able to do the remapping, provided the BIOS does not 
mess it up. I have no idea about the E7210 (or the 875P - I was not aware 
that they were this closely related), but without checking any docs I'm 
assuming a 4G memory ceiling and no remapping capability.

Thank you.

> lspci of the new box with 975X and Core 2 Duo not available yet for
> obvious reasons (I don't have the the box yet).

I'd appreciate if you could send me both lspci and /proc/iomem output when 
you get one of these with 4G or more ram installed. Off list, please.

Yours,
-S
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-- 
Simen Thoresen, Dolphin ICS