hvm save twice fails

[Amin <amino7@yahoo.com>]

Hi,

I'm running changeset 14422 on 64bit.
I did a full compile and reinstall from scratch.

I can successfully xm save and restore a win 2003 VM - but just once. The 
second save fails, nothing happens and the domain is still running. I see 
the following file sizes:
-rwxr-xr-x 1 root root 546181260 Mar 19 15:26 snapshot
-rwxr-xr-x 1 root root      1345 Mar 19 15:26 snapshot2

as you see the second snapshot file is almost empty.
Any ideas?

Below is what I see in xend.log.

Regards,
Amin


[2007-03-19 15:26:44 2790] DEBUG (XendConfig:1288) update_with_image_sxp
(['hvm', ['kernel', '/usr/lib/xen/boot/hvmloader'], ['acpi', '1'], 
['apic', '1'], ['boot', 'c'], ['device_
model', '/usr/lib64/xen/bin/qemu-dm'], ['display', ':0'], ['isa', '0'], 
['localtime', '0'], ['nographic', '0'], ['pae', '0'], ['stdvga', '0'], 
['usb', '1'], ['usbdevice', 'tablet
'], ['vncconsole', '1'], ['vncunused', '1'], ['xauthority', '/
root/.xauthwpWPr3']])
[2007-03-19 15:26:44 2790] DEBUG (XendDomainInfo:816) Storing domain 
details: {'console/port': '3', 'name': 'migrating-Hyp_1', 'console/
limit': '1048576', 'vm': '/vm/18d4a195-23d
4-1f07-2962-3b73972eaeef', 'domid': '2', 'cpu/0/availability': 'online', 
'memory/target': '524288', 'control/platform-feature-multiprocessor-
suspend': '1', 'store/ring-ref': '131
070', 'store/port': '2'}
[2007-03-19 15:26:44 2790] INFO (XendCheckpoint:81) save hvm domain
[2007-03-19 15:26:44 2790] DEBUG (XendCheckpoint:95) [xc_save]: /usr/
lib64/xen/bin/xc_save 4 2 0 0 4
[2007-03-19 15:26:44 2790] INFO (XendCheckpoint:344) xc_hvm_save:dom=2, 
max_iters=0, max_factor=0, flags=0x4, live=0, debug=0.
[2007-03-19 15:26:44 2790] INFO (XendCheckpoint:344) ERROR Internal 
error: HVM:Couldn't map live_shinfo
[2007-03-19 15:26:44 2790] ERROR (XendCheckpoint:147) Save failed on 
domain Hyp_1 (2).
Traceback (most recent call last):
  File "//usr/lib64/python/xen/xend/XendCheckpoint.py", line 116, in save
    forkHelper(cmd, fd, saveInputHandler, False)
  File "//usr/lib64/python/xen/xend/XendCheckpoint.py", line 332, in 
forkHelper
    raise XendError("%s failed" % string.join(cmd))
XendError: /usr/lib64/xen/bin/xc_save 4 2 0 0 4 failed
[2007-03-19 15:26:44 2790] DEBUG (XendDomainInfo:1659) 
XendDomainInfo.resumeDomain(2)
[2007-03-19 15:26:44 2790] INFO (XendDomainInfo:1866) Dev 768 still 
active, looping...
[2007-03-19 15:26:44 2790] INFO (XendDomainInfo:1866) Dev 768 still 
active, looping...
[2007-03-19 15:26:44 2790] INFO (XendDomainInfo:1866) Dev 768 still 
active, looping...
[2007-03-19 15:26:44 2790] INFO (XendDomainInfo:1866) Dev 768 still 
active, looping...
[2007-03-19 15:26:44 2790] INFO (XendDomainInfo:1885) Dev 0 still active, 
looping...
[2007-03-19 15:26:45 2790] INFO (XendDomainInfo:1885) Dev 0 still active, 
looping...
[2007-03-19 15:26:45 2790] DEBUG (XendDomainInfo:1670) 
XendDomainInfo.resumeDomain: devices released
[2007-03-19 15:26:45 2790] DEBUG (XendDomainInfo:816) Storing domain 
details: {'console/port': '3', 'name': 'migrating-Hyp_1', 'console/
limit': '1048576', 'vm': '/vm/18d4a195-23d
4-1f07-2962-3b73972eaeef', 'domid': '2', 'cpu/0/availability': 'online', 
'memory/target': '524288', 'control/platform-feature-multiprocessor-
suspend': '1', 'store/ring-ref': '131
070', 'store/port': '2'}
[2007-03-19 15:26:45 2790] INFO (XendDomainInfo:1290) createDevice: vfb : 
{'vncunused': '1', 'other_config': {'vncunused': '1', 'type': 'vnc', 
'display': ':0', 'xauthority': '/ro
ot/.xauthwpWPr3'}, 'xauthority': '/root/.xauthwpWPr3', 'devid': None, 
'location': 'localhost:5900', 'type': 'vnc', 'display': ':0', 'uuid': 
'd5e3d396-6910-5dec-9603-658206adcbbb'
}
[2007-03-19 15:26:45 2790] ERROR (XendDomainInfo:1687) 
XendDomainInfo.resume: xc.domain_resume failed on domain 2.
Traceback (most recent call last):
  File "//usr/lib64/python/xen/xend/XendDomainInfo.py", line 1681, in 
resumeDomain
    self._createDevices()
  File "//usr/lib64/python/xen/xend/XendDomainInfo.py", line 1292, in 
_createDevices
    devid = self._createDevice(devclass, config)
  File "//usr/lib64/python/xen/xend/XendDomainInfo.py", line 1268, in 
_createDevice
    return self.getDeviceController(deviceClass).createDevice(devConfig)
  File "//usr/lib64/python/xen/xend/server/vfbif.py", line 48, in 
createDevice
    DevController.createDevice(self, config)
  File "//usr/lib64/python/xen/xend/server/DevController.py", line 111, 
in createDevice
    raise VmError("Device %s is already connected." % dev_str)
VmError: Device 0 (vfb) is already connected.
[2007-03-19 15:26:45 2790] DEBUG (XendCheckpoint:150) 
XendCheckpoint.save: resumeDomain
[2007-03-19 15:26:45 2790] DEBUG (XendConfig:1288) update_with_image_sxp
(['hvm', ['kernel', '/usr/lib/xen/boot/hvmloader'], ['acpi', '1'], 
['apic', '1'], ['boot', 'c'], ['device_
model', '/usr/lib64/xen/bin/qemu-dm'], ['display', ':0'], ['isa', '0'], 
['localtime', '0'], ['nographic', '0'], ['pae', '0'], ['stdvga', '0'], 
['usb', '1'], ['usbdevice', 'tablet
'], ['vncconsole', '1'], ['vncunused', '1'], ['xauthority', '/
root/.xauthwpWPr3']])
[2007-03-19 15:26:45 2790] DEBUG (XendDomainInfo:816) Storing domain 
details: {'console/port': '3', 'name': 'Hyp_1', 'console/limit': 
'1048576', 'vm': '/vm/18d4a195-23d4-1f07-296
2-3b73972eaeef', 'domid': '2', 'cpu/0/availability': 'online', 'memory/
target': '524288', 'control/platform-feature-multiprocessor-suspend': 
'1', 'store/ring-ref': '131070', 'sto
re/port': '2'}