title: How to shutdown or reboot VM forcely in XEN?
body: <p>It happen to me to find a VM in XEN run out of memory, OS kill its shell tty so there is no way to input command in VM internally. The only way to fix is shutdown or reboot the VM. </p>
  
  <p>"xm shutdown VM-name" and "xm reboot VM-name" have been tried, but not work. XEN is working fine, the rest VMs are all good, and xm command work for them too. only the ill VM out of control.</p>
  
  <p>Is there any XEN command to shutdown or reboot its VM by force? e.g. some command with "--force" flag.
  "xm reboot" and "xm shutdown" are too grace in my case, I think.</p>
  
  <p>The XEN version I used is xen-3.0-x86_64 (debian). </p>