[Xen-bugs] [Bug 1059] New: Live-Migrating leads to a dom0 Oops and leaves a Zombie VM

[bugzilla-daemon@xxxxxxxxxxxxxxxxxxx]

http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1059

           Summary: Live-Migrating leads to a dom0 Oops and leaves a Zombie
                    VM
           Product: Xen
           Version: 3.0.3
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Hypervisor
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: xen@xxxxxxxxxxxx


During live-migration of a domU while running 
> memtest 400M
(see: http://pyropus.ca/software/memtester/)
a kernel Oops occurred.  Afterwards there was a Zombie - VM -- no way to kill,
shutdown or remove it.

System (dom0):
2*Intel(R) Pentium(R) III CPU - S 1400MHz
2GByte RAM
Debian 4.0
Linux 2.6.20-1-xen-686 #1 SMP Wed Apr 25 02:12:58 UTC 2007 i686 GNU/Linux

System (domU):
Debian 4.0
Linux 2.6.18-4-xen-686 #1 SMP Mon Mar 26 21:49:04 UTC 2007 i686 GNU/Linux

Attachments:
syslog: excerpt from /var/log/syslog
xend.log: excerpt from /var/log/xen/xend.log

# xm list
Name                                      ID Mem(MiB) VCPUs State   Time(s)
Domain-0                                   0     1497     2 r-----   4410.3
Zombie-migrating-vm02                     36      512     1 ---s-d   1389.6
# xm destroy 36
# xm list
Name                                      ID Mem(MiB) VCPUs State   Time(s)
Domain-0                                   0     1497     2 r-----   4413.1
Zombie-migrating-vm02                     36      512     1 ---s-d   1389.6

(Note: I tested what happens, if the RAM change-rate is faster than the
network.  Some hundred times it worked well - but once I run in the error
described here.)

Kind regards & happy debugging

Andreas Florath


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