[Fedora-xen] How to kill a domU that has no id

[Gerhard Scheffler <lists akixa info>]

How to kill a domU that has no id? 

# xm list
Name                                        ID   Mem VCPUs      State   
Time(s)
Domain-0                                     0   512     2     r-----   2745.2
m1                                           1  1024     2     -b----   7764.6
m3                                           2  1024     2     -b----   6765.8
m4                                           5   512     2     -b----   1032.5
m5                                               512     2                 0.0

Does m5 realy consume memory?
xm lists m5 even after dom0 reboot.  

Gerhard