Re: live-migration restore failed error

[Andrew Cooper <andrew.cooper3@citrix.com>]

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On 15/09/2014 10:41, 常怀鑫(一斋) wrote:
> 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:   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

Xen is unable to fulfil the allocation request.  You have run out of
host memory.

~Andrew

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