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[Xen-users] Live Migration failes with Failed to pin batch of xxx page tables (22 = Invalid argument): Internal error

Hi folks,

I have setup Xen 4.1.2 on CentOS 6. It is running fine so far, but live migration does not work.

While the source host works on the "xm migrate -l ..." command, I can see the VM on the target host in paused state in "xm list", but after a while it vanishes while the xm command on the source machine returns with return code 130.
Both machines have identical hardware (Xeon E5310, Chipset, etc.).

In the logs of the target machine I find entries like
INFO (XendCheckpoint:423) xc: error: Failed to pin batch of 392 page tables (22 = Invalid argument): Internal error
and then:
[2012-03-13 20:38:23 1696] ERROR (XendDomainInfo:3085) XendDomainInfo.destroy: domain destruction failed.
Traceback (most recent call last):
File "/usr/lib64/python2.6/site-packages/xen/xend/XendDomainInfo.py", line 3078, in destroy
Error: (3, 'No such process')
I have searched the net and this list and found a few posts mentioning this error, but no solution, not even a hint on the source of the probelm. And most of the posts seem concerned with Remus, not with "plain" live migration.

What can I do to troubleshoot this issue?

Any hint or help is appreciated.


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