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

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Tue, Mar 23, 2010 at 05:04:59PM +0900, ?????? wrote:
>    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??
> 

You need to update your domU kernel to the latest stable update (2.6.32.10), 
and that'll fix the problem. 2.6.32(.0) doesn't yet have the necessary 
save/restore fixes.

-- Pasi


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