Munehisa Kamata (https://launchpad.net/~kamatam) took at a look at this from our side and he believes that
"the following commit has introduced this. It is in Linux kernel 3.13 or later, and I've confirmed that kernel 3.14 still shows the same symptom. http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/xen/balloon.c?id=c275a57f5ec3056f732843b11659d892235faff7 Looking at the change, only HVM will exhibit this. Also, it seems that this can only happen on c3.large and m3.medium, they have < 4GB of memory. The following discussion may be related to this, but I'm not sure if it is. http://lists.xen.org/archives/html/xen-devel/2014-01/msg01524.html" -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1304001 Title: xen:balloon errors in 14.04 beta To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1304001/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs