The verification method could see comment13 on 659855
another way also from eric is
1, in a terminal , stop the libvirt service , then run "ulimit -n 1000000"
2, start the libvirtd, # libvirtd
3, in another terminal , start a guest, it will report
error: Failed to start domain rhel6.1
error: internal error Process exited while reading console log output:
The bug has been verified on libvirt-0.8.2-15.el5_6.1.
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/RHBA-2011-0142.html