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This bug has been copied from bug #700538 and has been proposed
to be backported to 6.1 z-stream (EUS).

    Technical note added. If any revisions are required, please edit the "Technical Notes" field
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    New Contents:
When using certain SELinux policies, such as the MLS policy, it was not possible to properly mount the cgroupfs file system due to the way security checks were applied to the new cgroupfs inodes during the mount operation. With this update, the security checks applied during the mount operation have been changed so that they always succeed, and the cgroupfs file system can now be successfully mounted and used with the MLS SELinux policy. This issue did not affect systems which used the default targeted policy.

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-2011-0928.html