Posted fix in rhvirt-patches with Message-ID: <20100915150855.GF5981@random.random>

Here a build including the fix: https://brewweb.devel.redhat.com/taskinfo?taskID=2764810

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    New Contents:
When running a virtual machine with 4 or more gigabytes of the virtual memory, an attempt to hot plug a network interface controller (NIC) failed with the following error message:

  Device '[device_name]' could not be initialized

This update resolves this issue, and hot-plugging a NIC in a virtual machine with 4 or more gigabytes of the virtual memory no longer fails.

    Technical note updated. If any revisions are required, please edit the "Technical Notes" field
    accordingly. All revisions will be proofread by the Engineering Content Services team.
    
    Diffed Contents:
@@ -1,5 +1 @@
-When running a virtual machine with 4 or more gigabytes of the virtual memory, an attempt to hot plug a network interface controller (NIC) failed with the following error message:
+Previously, when a network interface controller (NIC) was plugged into or unplugged in a running virtual machine with 4 or more gigabytes of virtual memory, a "Device '[device_name]' could not be initialized" error displayed. This is now fixed and plugging or unplugging an NIC in a running virtual machine with 4 or more gigabytes of the virtual memory works as expected.-
-  Device '[device_name]' could not be initialized
-
-This update resolves this issue, and hot-plugging a NIC in a virtual machine with 4 or more gigabytes of the virtual memory no longer fails.

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2011-0534.html

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2011-0534.html