[Xen-devel] [pvops dom0 xm save failed]

[박은병 <peb1611@xxxxxxxxx>]

when I command 'xm save [domainU] [filename]', save process does not complete with this error message

Error: /usr/lib/xen/bin/xc_save 34 2 0 0 0 failed
Usage: xm save [-c] <Domain> <CheckpointFile>

Save a domain state to restore later.
  -c, --checkpoint               Leave domain running after creating       
                                 snapshot

and /var/log/xen/xend.log produced below error message.

[2010-03-23 16:58:07 1023] DEBUG (DevController:643) hotplugStatusCallback 1.
[2010-03-23 16:58:07 1023] DEBUG (DevController:139) Waiting for devices irq.
[2010-03-23 16:58:07 1023] DEBUG (DevController:139) Waiting for devices vfb.
[2010-03-23 16:58:07 1023] DEBUG (DevController:139) Waiting for devices pci.
[2010-03-23 16:58:07 1023] DEBUG (DevController:139) Waiting for devices vtpm.
[2010-03-23 16:58:07 1023] INFO (XendDomain:1182) Domain ubuntu1 (3) unpaused.
[2010-03-23 16:58:42 1023] DEBUG (XendCheckpoint:110) [xc_save]: /usr/lib/xen/bin/xc_save 34 3 0 0 0
[2010-03-23 16:58:42 1023] INFO (XendCheckpoint:417) xc_save: failed to get the suspend evtchn port
[2010-03-23 16:58:42 1023] DEBUG (XendCheckpoint:388) suspend
[2010-03-23 16:58:42 1023] INFO (XendCheckpoint:417)
[2010-03-23 16:58:42 1023] DEBUG (XendCheckpoint:113) In saveInputHandler suspend
[2010-03-23 16:58:42 1023] DEBUG (XendCheckpoint:115) Suspending 3 ...
[2010-03-23 16:58:42 1023] DEBUG (XendDomainInfo:511) XendDomainInfo.shutdown(suspend)
[2010-03-23 16:58:42 1023] DEBUG (XendDomainInfo:1709) XendDomainInfo.handleShutdownWatch
[2010-03-23 16:58:42 1023] DEBUG (XendDomainInfo:1709) XendDomainInfo.handleShutdownWatch
[2010-03-23 16:58:42 1023] INFO (XendDomainInfo:1903) Domain has shutdown: name=migrating-ubuntu1 id=3 reason=suspend.
[2010-03-23 16:58:42 1023] INFO (XendCheckpoint:121) Domain 3 suspended.
[2010-03-23 16:58:42 1023] DEBUG (XendCheckpoint:130) Written done
[2010-03-23 16:58:42 1023] ERROR (XendCheckpoint:164) Save failed on domain ubuntu1 (3) - resuming.
Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/xen/xend/XendCheckpoint.py", line 132, in save
    forkHelper(cmd, fd, saveInputHandler, False)
  File "/usr/lib/python2.6/dist-packages/xen/xend/XendCheckpoint.py", line 405, in forkHelper
    raise XendError("%s failed" % string.join(cmd))
XendError: /usr/lib/xen/bin/xc_save 34 3 0 0 0 failed
[2010-03-23 16:58:42 1023] DEBUG (XendDomainInfo:2788) XendDomainInfo.resumeDomain(3)
[2010-03-23 16:58:42 1023] DEBUG (XendDomainInfo:2829) XendDomainInfo.resumeDomain: completed
[2010-03-23 17:01:10 1023] DEBUG (XendDomainInfo:2732) XendDomainInfo.destroy: domid=3
[2010-03-23 17:01:11 1023] DEBUG (XendDomainInfo:2207) Destroying device model
[2010-03-23 17:01:11 1023] DEBUG (XendDomainInfo:2214) Releasing devices
[2010-03-23 17:01:11 1023] DEBUG (XendDomainInfo:2227) Removing vif/0
[2010-03-23 17:01:11 1023] DEBUG (XendDomainInfo:1134) XendDomainInfo.destroyDevice: deviceClass = vif, device = vif/0
[2010-03-23 17:01:11 1023] DEBUG (XendDomainInfo:2227) Removing console/0
[2010-03-23 17:01:11 1023] DEBUG (XendDomainInfo:1134) XendDomainInfo.destroyDevice: deviceClass = console, device = console/0
[2010-03-23 17:01:11 1023] DEBUG (XendDomainInfo:2227) Removing vbd/51713
[2010-03-23 17:01:11 1023] DEBUG (XendDomainInfo:1134) XendDomainInfo.destroyDevice: deviceClass = vbd, device = vbd/51713
[2010-03-23 17:01:11 1023] DEBUG (XendDomainInfo:2227) Removing vbd/51714
[2010-03-23 17:01:11 1023] DEBUG (XendDomainInfo:1134) XendDomainInfo.destroyDevice: deviceClass = vbd, device = vbd/51714
[2010-03-23 17:01:11 1023] DEBUG (XendDomainInfo:2212) No device model
[2010-03-23 17:01:11 1023] DEBUG (XendDomainInfo:2214) Releasing devices

my system configuration ( 32bit machine )

xen 3.4.2, dom0( jeremy's pvops kernel 2.6.31.6), domU( vanilla kernel 2.6.32 with paravirt enabled), distribution( ubuntu 9.10 )

It does not work well

what is the problem??
I think current system is quite stable, newtork, disk, and so on.
Is there anyone who know this or has experience??

-- 
Eunbyung Park
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