XEN

Xen virtualization with Intel-VT

Sep 4th

Posted by rmichel in Linux

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Hej,

for a training i needed some pcs with a virtualization technology preferably from Intel (VT). The easiest way is to buy some pc components and to build thereof a pc. After my last selfmade pc i’m a little bit impaired on that score. So i needed a pre-build pc with a intel cpu, gigabit lan and if it possible: small-sized. So is started my research with my best friend google ;)

After a while i found the transtec SENYO 610.

In the small configuration they have a

inside. But according to the Intel website both cpus didn’t support the Intel VT :( So i needed the big one and they have the following configuration

  • C2D T8300 / C2D T9500
  • 1 GB DDR2 RAM (up to 4GB RAM)
  • 160GB 5400rpm (up to 500GB)
  • Gigalan, Bluetooth, Wlan

So i order the big one with a C2D T8300, 4GB Ram and a 160GB (7200rpm) harddisk. Now i’m waiting for the postman :D

XEN: clocksource/0 Time went backwards

Jul 7th

Posted by rmichel in HowTo

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Everybody know about these sweet line(s):

clocksource/0: Time went backwards: delta=-5802595381342 shadow=440273248432 offset=11586903

To prevent this, add this line to your sysctl.conf

xen.independent_wallclock=1

Next is, to add

extra="clocksource=jiffies"

to the config of your XEN domain (like /srv/xen/build.conf).

After all this, you can reboot the vm’s or to get it working for your current kernel config type this in each vm:

sysctl -p
echo "jiffies" > /sys/devices/system/clocksource/clocksource0/current_clocksource

At the moment i only know this from debian-based systems.

Mac OS X und die XEN Console

Jul 5th

Posted by rmichel in OSX

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Um die XEN Console unter Mac OS X bzw dessen Terminal zu verlassen CTRL+ALT+6 !

Kurz aber Schmerzlos ;)