Re: [Xen-users] Xen on quad socket AMD Barcelona

To:	"Dean Huffman" <dean.huffman@xxxxxxxxxxxxxxxxxxx>
Subject:	Re: [Xen-users] Xen on quad socket AMD Barcelona
From:	"Yinghai Lu" <yhlu.kernel@xxxxxxxxx>
Date:	Wed, 26 Sep 2007 10:09:06 -0700
Cc:	xen-users@xxxxxxxxxxxxxxxxxxx
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On 9/26/07, Dean Huffman <dean.huffman@xxxxxxxxxxxxxxxxxxx> wrote:
>
>
>
>
> I've been trying to get Xen working on a quad socket Barcelona system but I
> it hangs just after the Xen hypervisor prints "Brought up 16 CPUs"
>
> -          The system will run standard Redhat Linux
>
> -          Xen will run if I only power up 2 of the 4 sockets (8 of the 16
> cores.)
>
>
>
> I'm still using Xen 3.0.4 but did try Xen 3.1.0 with out any luck.
>
>
>
> If anyone can answer the following I'd be greatfull.
>
>
>
> Has anyone been able to successfully bring up Xen on a quad socket AMD
> Barcelona system?
>

it could be BIOS problem

but xen could workaround it.

before bother your BIOS guys
at this time, you could try:
1. build latest linux kernel with kexec support.
2. use kexec to load xen etc.

#!/bin/bash
P_XKI=
KERNEL_VER=2.6.18-49.el5
XEN="$P_XKI"xen.gz-"$KERNEL_VER"
VMLINUZ="$P_XKI"vmlinuz-"$KERNEL_VER"xen
INITRD="$P_XKI"initrd-"$KERNEL_VER"xen.img
./kexec -l "$XEN" --command-line="com1=9600,8n1 cdb=com1"
--module=""$VMLINUZ" ro root=LABEL=/ console=ttyS0,9600,8n1"
--module=""$INITRD""

if it works, you need one BIOS update.

it could be the problem like
http://lkml.org/lkml/2007/9/21/382

YH

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