copied from https://fedorahosted.org/389/ticket/48164
The event queue notify signal pipe uses blocking I/O. Should use non-blocking I/O.
commit 7597a73c29b74dcce6c706bac1f2157cb9d82016 Author: Rich Megginson rmeggins@redhat.com Date: Tue Apr 21 10:59:13 2015 -0600