We are working on
live-migration based on Xen-4.0.1(For history reason, and
meantime we are upgrading our Xen to very latest version).
Restore failed when live migrating ubuntu12.04 on xen-4.0.1.
To be more specific, error occurred when populating memory.
Error messages are as follow:
[2014-09-12 22:40:40 7331 1189091648] DEBUG
(XendCheckpoint:307) [xc_restore]:
/usr/lib64/xen/bin/xc_restore 4 2763 3 4 1 1 1 0
[2014-09-12 22:40:40 7331 1189091648] DEBUG
(XendCheckpoint:428) Thread-40188
[2014-09-12 22:40:40 7331 1172306240] INFO
(XendCheckpoint:476) Thread-40188:xc_domain_restore start:
p2m_size = fefff
[2014-09-12 22:40:40 7331 1172306240] INFO
(XendCheckpoint:476) Thread-40188:Reloading memory pages:ÂÂ 0%
[2014-09-12 22:40:50 7331 1172306240] INFO
(XendCheckpoint:476) Thread-40188:Failed allocation for dom
2763: 128 extents of order 0
[2014-09-12 22:40:50 7331 1172306240] INFO
(XendCheckpoint:476) Thread-40188:ERROR Internal error: Failed
to allocate memory for batch.!
[2014-09-12 22:40:50 7331 1172306240] INFO
(XendCheckpoint:476) Thread-40188:
[2014-09-12 22:40:50 7331 1172306240] INFO
(XendCheckpoint:476) Thread-40188:Restore exit with rc=1
[2014-09-12 22:40:50 7331 1189091648] DEBUG
(XendCheckpoint:462) /usr/lib64/xen/bin/xc_restore 4 2763 3 4
1 1 1 0 failed status 256
[2014-09-12 22:40:50 7331 1189091648] DEBUG
(XendDomainInfo:3845) XendDomainInfo.destroy: domid=2763
In
this case, populate_physmap terminated with nr_done 127. So
xc_memory_op return 127 while nr_extents equals 128.
This problem happends once every 1770th live migration or so.
As I am debugging this issue, I'm sending this email to ask
for suggestions on this issue.
Thanks,
Huaixin
Chang
