[Xen-users] live migration fails with device still active

[vu pham <vu@xxxxxxxxxx>]

I am trying to do a test live migration between my two Domain-0 using 
RHEL5.3 but it fails with the error that the disk device is still active.
This disk in this case is an iscsi disk which both dom0 can see an 
access without any problem. udev is used to make the device name 
(/dev/iscsi )to be identical from the two dom0.
Below is the /var/log/xen/xend.log. Any advice is greatly appreciated.


Thanks,
Vu

[2009-04-22 10:52:00 xend.XendDomainInfo 4274] DEBUG 
(XendDomainInfo:791) Storing domain details: {'console/ring-ref': 
'2211136', 'console/port': '2', 'name': 'migrating-rh401', 
'console/limit': '1048576', 'vm': 
'/vm/d84f3f23-4f31-1322-cb5a-67ba2e6cdfb7', 'domid': '4', 
'cpu/0/availability': 'online', 'memory/target': '1048576', 
'store/ring-ref': '2211137', 'store/port': '1'}
[2009-04-22 10:52:00 xend 4274] DEBUG (blkif:24) exception looking up 
device number for xvda: [Errno 2] No such file or directory: '/dev/xvda'
[2009-04-22 10:52:00 xend 4274] DEBUG (DevController:110) DevController: 
writing {'virtual-device': '51712', 'device-type': 'disk', 'protocol': 
'x86_32-abi', 'backend-id': '0', 'state': '1', 'backend': 
'/local/domain/0/backend/vbd/4/51712'} to /local/domain/4/device/vbd/51712.
[2009-04-22 10:52:00 xend 4274] DEBUG (DevController:112) DevController: 
writing {'domain': 'migrating-rh401', 'frontend': 
'/local/domain/4/device/vbd/51712', 'dev': 'xvda', 'state': '1', 
'params': '/dev/iscsi1', 'mode': 'w', 'online': '1', 'frontend-id': '4', 
'type': 'phy'} to /local/domain/0/backend/vbd/4/51712.
[2009-04-22 10:52:00 xend 4274] DEBUG (DevController:110) DevController: 
writing {'mac': '00:16:3e:3a:a9:57', 'handle': '0', 'protocol': 
'x86_32-abi', 'backend-id': '0', 'state': '1', 'backend': 
'/local/domain/0/backend/vif/4/0'} to /local/domain/4/device/vif/0.
[2009-04-22 10:52:00 xend 4274] DEBUG (DevController:112) DevController: 
writing {'bridge': 'xenbr0', 'domain': 'migrating-rh401', 'handle': '0', 
'script': '/etc/xen/scripts/vif-bridge', 'state': '1', 'frontend': 
'/local/domain/4/device/vif/0', 'mac': '00:16:3e:3a:a9:57', 'online': 
'1', 'frontend-id': '4'} to /local/domain/0/backend/vif/4/0.
[2009-04-22 10:52:00 xend.XendDomainInfo 4274] DEBUG 
(XendDomainInfo:1623) XendDomainInfo.resumeDomain: devices created
[2009-04-22 10:52:00 xend.XendDomainInfo 4274] ERROR 
(XendDomainInfo:1628) XendDomainInfo.resume: xc.domain_resume failed on 
domain 4.
Traceback (most recent call last):
  File "/usr/lib64/python2.4/site-packages/xen/xend/XendDomainInfo.py", 
line 1625, in resumeDomain
    xc.domain_resume(self.domid, fast)
Error: (1, 'Internal error', "Couldn't map p2m_frame_list_list")
[2009-04-22 10:52:00 xend 4274] DEBUG (XendCheckpoint:136) 
XendCheckpoint.save: resumeDomain
[2009-04-22 10:52:00 xend.XendDomainInfo 4274] INFO 
(XendDomainInfo:1719) Dev 51712 still active, looping...
[2009-04-22 10:52:00 xend.XendDomainInfo 4274] INFO 
(XendDomainInfo:1719) Dev 51712 still active, looping...
[2009-04-22 10:52:01 xend.XendDomainInfo 4274] INFO 
(XendDomainInfo:1719) Dev 51712 still active, looping...
[2009-04-22 10:52:01 xend.XendDomainInfo 4274] INFO 
(XendDomainInfo:1719) Dev 51712 still active, looping...
[2009-04-22 10:52:01 xend.XendDomainInfo 4274] INFO 
(XendDomainInfo:1719) Dev 51712 still active, looping...
[2009-04-22 10:52:01 xend.XendDomainInfo 4274] INFO 
(XendDomainInfo:1719) Dev 51712 still active, looping...
[2009-04-22 10:52:01 xend.XendDomainInfo 4274] INFO 
(XendDomainInfo:1719) Dev 51712 still active, looping...
[2009-04-22 10:52:01 xend.XendDomainInfo 4274] INFO 
(XendDomainInfo:1719) Dev 51712 still active, looping...
[2009-04-22 10:52:01 xend.XendDomainInfo 4274] INFO 
(XendDomainInfo:1719) Dev 51712 still active, looping...
[2009-04-22 10:52:01 xend.XendDomainInfo 4274] INFO 
(XendDomainInfo:1719) Dev 51712 still active, looping...
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