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

[박은병 <peb1611@xxxxxxxxx>]

this is my domU config file 
there is nothing special....

==============================================================
kernel = "/boot/vmlinuz-2.6.32.10-domU"
ramdisk = "/boot/initrd.img-2.6.32.10-domU"
memory = 1024
name = "ubuntu1"
vcpus = 1
vif = [ 'mac=00:16:3e:48:ef:5c, bridge=eth0' ]
disk = [ 'file:/root/xen/domainU/ubuntu1/ubuntu1.img,xvda1,w','file:/root/xen/domainU/ubuntu1/ubuntu1_swap.img,xvda2,w' ]
hostname= "ubuntu1"
root = "/dev/xvda1 ro"
extra = "console=hvc0 earlyprintk=xen"
==============================================================

and I also used Ubuntu distribution .config file which was created at Ubuntu install time for domU build

2010/3/23 Pasi Kärkkäinen <pasik@xxxxxx>

On Tue, Mar 23, 2010 at 08:01:42PM +0900, ?????? wrote:
>    2.6.32.10 domU also failed with same error log..
>    Is it exactly domU problem??
>

For PV guests it is _usually_ a domU kernel problem.

>    Is there specific kernel configuration related to save/restore??
>    any other comments??
>

I tested using 2.6.32.9 in the domU 1 month ago (or so),
and I could save/restore just fine.

I tried both 32bit and 64bit guests, and both single-vcpu and multi-vcpu.
my .config was based on Fedora kernel .config.

Please paste your /etc/xen/<guest> cfgfile?

-- Pasi

>    2010/3/23 Pasi Kärkkäinen <[1]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
>
>    --
>    Eunbyung Park
>

> References
>
>    Visible links
>    1. mailto:pasik@xxxxxx

-- 
Eunbyung Park
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