Comment 11 for bug 1479031

Per Dan's request... second test is what he asked me to test -> It reasonably mitigates the issue:

#
# Precise latest -updates kernel
#

inaddy@sf00068947precise:~$ uname -a
Linux sf00068947precise 3.2.0-89-generic #127-Ubuntu SMP Tue Jul 28 09:28:15 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

inaddy@alien:teste$ ./teste.sh
% RUN: 1
+ Creating disk 0: /dev/vdb
+ Creating disk 1: /dev/vdc
! Starting virtual machine
! Adding disk 0: /dev/vdb
! Adding disk 1: /dev/vdc
! Waiting virtual machine network to be up
! Checking if disk is online:
* Found 0 extra disks online
$ Missing disk(s) exiting

inaddy@alien:teste$ virsh shutdown sf00068947precise
Domain sf00068947precise is being shutdown

inaddy@alien:teste$ ./teste.sh
% RUN: 1
+ Creating disk 0: /dev/vdb
+ Creating disk 1: /dev/vdc
! Starting virtual machine
! Adding disk 0: /dev/vdb
! Adding disk 1: /dev/vdc
! Waiting virtual machine network to be up
! Checking if disk is online:
* Found 0 extra disks online
$ Missing disk(s) exiting

#
# Precise latest kernel
#
# CONFIG_HOTPLUG_PCI=y
# CONFIG_HOTPLUG_PCI_FAKE=m
# CONFIG_HOTPLUG_PCI_ACPI=y
#

inaddy@sf00068947precise:~$ uname -a
Linux sf00068947precise 3.2.69-inaddy #1 SMP Wed Aug 12 15:43:37 BRT 2015 x86_64 x86_64 x86_64 GNU/Linux

inaddy@alien:teste$ ./teste.sh
% RUN: 1
+ Creating disk 0: /dev/vdb
+ Creating disk 1: /dev/vdc
! Starting virtual machine
! Adding disk 0: /dev/vdb
! Adding disk 1: /dev/vdc
! Waiting virtual machine network to be up
! Checking if disk is online:
* Found 2 extra disks online
! Destroying virtual machine
...
...
% RUN: 16
+ Creating disk 0: /dev/vdb
+ Creating disk 1: /dev/vdc
! Starting virtual machine
! Adding disk 0: /dev/vdb
! Adding disk 1: /dev/vdc
! Waiting virtual machine network to be up
! Checking if disk is online:
* Found 2 extra disks online
! Destroying virtual machine
...