Markus Blog

error: kernel image does not exist: /boot/hypervm-xen-vmlinuz

If you have a CentOS Xen Dom0 and experiencing this problem “error: kernel image does not exist: /boot/hypervm-xen-vmlinuz” after upgrading Xen kernel on HyperVM based VPS, here is how to fix it: More »

Xen VPS modprobe: QM_MODULES: Function not implemented

I got this problem on one of Debian VPS when tried to run iptables command

modprobe: QM_MODULES: Function not implemented
 
modprobe: QM_MODULES: Function not implemented
 
modprobe: Can't locate module ip_tables
iptables v1.3.6: can't initialize iptables table `filter': iptables
who? (do you need to insmod?)
Perhaps iptables or your kernel needs to be upgraded.

To fix this you’ll need to run these commands:
More »

Xen Debian VPS Problem With nash-hotplug Using 100% CPU Resource

Recently I setup a Debian 4.0 VPS using xen image from jailtime.org, once the VM running I noticed that the load goes 1.0 all the time which make the VM very slow. From top command you’ll see the nash-hotplug process is the cause.

First you can kill it by execute the ‘kill -9 <process id>’ command (without the quotes), where <process id> is the process id of nash-hotplug. Then to automate killing the nash process every time you reboot the VPS run these commands: More »

Xen VPS “4gb seg fix up” Problem

It’s a known issues on Xen based Virtual Private Server (VPS) that often it shows “4gb seg fix up” error messages. After a few search I found this command to fix it.

Run the commands below on DomU

First try disabling tls by renaming it to tls.disabled:

mv /lib/tls /lib/tls.disabled

If this doesn’t work then try this command:

echo 'hwcap 0 nosegneg' > /etc/ld.so.conf.d/libc6-xen.conf && ldconfig

after that you’ll need to restart the VPS