Comment 104 for bug 1403152

To reproduce the issue, install Docker (I'm alternatively using v0.11.1 or v1.0.0), spin up a container, and download a few hundred megabytes in it. On attempted system shutdown, you will see the message, and it ostensibly continues forever. You can see other people encountering this in the GitHub thread linked above. I haven't tried it with either 3.14 standard or other -rt kernels yet, but I'll try it out as soon as I get the time.