Xenserver Ubuntu 16 VMs freezing on migration

[Kseniya Blashchuk]

Hello!
We are experiencing virtual machines freezes during migration with
Xenserver 7.1 CU1 and Ubuntu 16.04. We are not sure which kernel versions
are affected but the last occurrence was with 4.4.0-139. We could catch
some logs on VM failure with netconsole (attached). It has "logstash time:
message" format, sorted by logstash time.
We do not think that such freezes have ever happened with Ubuntu 14. Could
you please help on the issue?

 affects ubuntu
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BR, Kseniya

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1807878/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]