graphic: 0.953
performance: 0.928
device: 0.889
boot: 0.763
semantic: 0.664
register: 0.636
vnc: 0.572
PID: 0.565
mistranslation: 0.521
risc-v: 0.502
VMM: 0.425
socket: 0.410
architecture: 0.408
i386: 0.403
x86: 0.385
debug: 0.383
kernel: 0.370
ppc: 0.355
TCG: 0.346
arm: 0.337
user-level: 0.336
assembly: 0.333
hypervisor: 0.266
KVM: 0.228
network: 0.167
virtual: 0.136
permissions: 0.126
files: 0.106
peripherals: 0.096

memory balloon massively slows Windows shutdown (almost feels like it crashed for minutes)
Description of problem:
When reducing the memory using ballooning, the shutdown takes very long. One may even assume it crashed, but it will eventually power off.
Steps to reproduce:
1. wait until Windows has booted
2. reduce the balloon by multiple GB via monitor: `balloon 8192` _(8 GB balloon, memory size is 24 GB)_
3. Shut down (or reboot) Windows

The system shows the boot screen at shutdown for a long time.

It's about 10 seconds extra time per reduced balloon size. So when resizing the balloon from 24 GB to 8 GB, that's 16 GB.  
So the shutdown needs: 16 * 10 = 160 seconds = **about 3 minutes**