Comment 3 for bug 1642941

Reviewed: https://review.fuel-infra.org/36877
Submitter: Olena Logvinova <email address hidden>
Branch: stable/9.2

Commit: 02a5b2d684bcf4bd195c83414b5660b128431693
Author: Alexey Stupnikov <email address hidden>
Date: Tue Oct 17 10:33:19 2017

Added a note about libvirt limits configuration

There are a special cases where default limits will not
work well. I have described an issue with ceph RBD storage
and possible fix.

Change-Id: I829ac2cae4aa4cec419335fddbe8bb7201605193
Closes-bug: #1642941