Description of problem:
Xen hypervisor in RHEL5 doesn't support cpuid masking. It's a required feature for cross CPU-vendor live-migrations, and to work-around bugs in guest PV kernels, like for example:
Version-Release number of selected component (if applicable):
This feature does not exist in RHEL5 Xen.
Support for CPUID masking was initially added in upstream Xen 3.3.0.
Thanks for the request. But at this time we do not plan to add this support due to low demand and the invasiveness to our code base.
Clearing out old flags for reporting purposes.
*** Bug 694492 has been marked as a duplicate of this bug. ***