Re: Re[4]: [Xen-users] Problem initializing dual-core Opteron

["John Hannfield" <hal9020@xxxxxxxxx>]

JH> # CONFIG_SMP is not set

Actually that was wrong. A apologise - I posted the wrong .config.
CONFIG_SMP was set to y

Amazingly I have got it to work, but by changing the BIOS settings,
and not the kernel. In my Tyan S2877 Bios under "Hammer Configuration"
there is a setting for

MemClk 

with options for 100 Mhz, 133 Mhz, 166Mhz, and 200Mhz.
The system will boot into xen and dom0 if MemClk is set to 100 or 133 Mhz.
If it is set to 166Mhz or 200Mhz it will not boot.
It fails at that point of activating the the CPU cores.

I wonder is this memClk to do with the installed RAM or is it
processor specific (like onboard cache?)

I am using 4 x 1GB kingston ram
400 Mhz DDR ECC Registered CL3 (3-3-3) DIMM Dual Rank, x8
Product: KVR400D8R3A/1G

As a side issue, when this xen kernel boots, it only shows the ram as 3GB.
When in non-xen it shows all 4GB.

Anybody know what setting this memClk BIOS setting has to do with 
booting the CPU's? Why should it work when it is set to a lower value?
(The default on the motherboard was 200 Mhz)

Cheers,
John
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