Re: [Xen-users] Core 2 Duo

[Václav Ovsík <vaclav.ovsik@xxxx>]

On Thu, Aug 31, 2006 at 02:38:44PM -0700, MJang wrote:
> Am considering a new laptop, and I wonder if anyone here can share their
> Xen experiences with the newest Core 2 Duo CPUs, ref
> http://www.intel.com/products/processor/core2duo/specifications.htm

I have Dell Latitude D820 with T2400 Core Duo and works without
problems. Dell had (or has) some problems with custumers in China, where
it sold Latitude notebooks with T2x00E CPU's without Intel VT (suffix E).

VT must be enabled in BIOS (POST behavior / virtualization or so).

bobek:~# xm dmesg
...
(XEN) Initializing CPU#0
(XEN) Detected 1828.777 MHz processor.
(XEN) CPU: L1 I cache: 32K, L1 D cache: 32K
(XEN) CPU: L2 cache: 2048K
(XEN) CPU: Physical Processor ID: 0
(XEN) CPU: Processor Core ID: 0
(XEN) VMXON is done
(XEN) Intel machine check architecture supported.
(XEN) Intel machine check reporting enabled on CPU#0.
(XEN) CPU0: Intel Genuine Intel(R) CPU           T2400  @ 1.83GHz
stepping 08
(XEN) Booting processor 1/1 eip 90000
(XEN) Initializing CPU#1
(XEN) CPU: L1 I cache: 32K, L1 D cache: 32K
(XEN) CPU: L2 cache: 2048K
(XEN) CPU: Physical Processor ID: 0
(XEN) CPU: Processor Core ID: 1
(XEN) VMXON is done
(XEN) Intel machine check architecture supported.
(XEN) Intel machine check reporting enabled on CPU#1.
(XEN) CPU1: Intel Genuine Intel(R) CPU           T2400  @ 1.83GHz
stepping 08
(XEN) Total of 2 processors activated.
...


bobek:~# cat /proc/cpuinfo 
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 14
model name      : Genuine Intel(R) CPU           T2400  @ 1.83GHz
stepping        : 8
cpu MHz         : 1833.000
cache size      : 2048 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 10
wp              : yes
flags           : fpu tsc msr pae mce cx8 apic mtrr mca cmov pat clflush dts 
acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc pni monitor vmx est tm2 xtpr
bogomips        : 3659.53

processor       : 1
vendor_id       : GenuineIntel
cpu family      : 6
model           : 14
model name      : Genuine Intel(R) CPU           T2400  @ 1.83GHz
stepping        : 8
cpu MHz         : 1833.000
cache size      : 2048 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 10
wp              : yes
flags           : fpu tsc msr pae mce cx8 apic mtrr mca cmov pat clflush dts 
acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc pni monitor vmx est tm2 xtpr
bogomips        : 3659.53


I think, that `vmx' flag is Intel VT.

I installed and activated OEM Windows XP from Dell into LVM without problem.
My box is Debian Sarge, but I have my kernel with unstable xen hg10868.

bobek:~# uname -a
Linux bobek 2.6.16xen-hg10868 #1 SMP Wed Aug 30 14:31:38 CEST 2006 i686 
GNU/Linux

Networking setup is NAT & I run DHCP server myself to configure domUs.
Notebook can be offline or on different networks, so local segment & NAT is ok
for this.
I'm using notebook network autoconfiguration with guessnet (i had problems with
laptop-net & xen). Guessnet uses information from
/etc/network/interfaces and so compatibility with ifupdown is better
(xen scripts magicks with network interfaces uses ifup & ifdown).

I have one static bridge in /etc/network/interfaces:

auto xenbr0
iface xenbr0 inet static
    address 172.31.0.128
    broadcast 172.31.0.255
    netmask 255.255.255.0
#    bridge_ports dummy0
    bridge_ports none

In dhcpd configuration file /etc/dhcp3/dhcpd.conf:

subnet 172.31.0.0 netmask 255.255.255.0 {
    option routers 172.31.0.128;
    option broadcast-address 172.31.0.255;
    range 172.31.0.1 172.31.0.127;
}

In /etc/default/dhcp3-server, there is no specific interface for
listenning on, but maybe xenbr0 can be ok.

There are uncomented network options in /etc/xen/xend-config.sxp:

(network-script network-nat)
(vif-script     vif-nat)


-- 
Zito

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