Evan, from your screenshots, I can see that the memory demand values and the /proc/meminfo values do match closely to each other.
On the 16.04.01 VM, /proc/meminfo shows Committed_AS value is ~1800MB. The balloon driver then adds a buffer of ~300MB (this buffer is calculated according to how much total memory is assigned to the VM). So ~1800MB + ~300MB = 2100MB matches closely with the 2088 MB memory demand that you're seeing from the host. A similar calculation on the 15.10 VM also shows that the meminfo values match closely with the reported memory demand. (~2900MB committed + ~500MB buffer = 3400MB compared to 3600MB) The main culprit in both cases appears to be the large amount of committed memory. Would be worth investigating what the cause of this memory usage is. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1584597 Title: Hyper-V Memory Ballooning re-broken in 16.04 Status in linux package in Ubuntu: Triaged Status in linux source package in Xenial: Triaged Bug description: Regression: #1294283 fixed memory ballooning in Hyper-V in 14.04, but the bug has returned in 16.04. Steps to reproduce: 1. Create Gen2 Hyper-V VM 2. Install Ubuntu 16.04 3. modprobe hv_balloon Memory usage according to Hyper-V Manager will not change This has been reproduced on 2 fresh Ubuntu Server 16.04 instances. I installed linux-generic-xenial on a 14.04 instance, rebooted, modprobe'd hv_balloon and memory usage in Hyper-V Manager reduced to the correct level. Environment: Host: Windows NanoServer 2016 Ubuntu Server 16.04 version_signature: `Ubuntu 4.4.0-21.37-generic 4.4.6` Ubuntu Server 14.04 version_signature: `Ubuntu 4.4.0-22.40~14.04.1-generic 4.4.8` To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1584597/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
