Você pode bloquear as páginas na memória em versões posteriores do libvirt: -
Cuidado : Isto não aparece quando usando o Fedora 19 como um hypervisor, no entanto, de acordo com o changelog para o último RPM (eu posso encontrar) para o EL6.5 libvirt que existe;
- Thu Jul 18 2013 Jiri Denemark - 0.10.2-21
- conf: Avoid NULL deref for pmsuspended domain state (rhbz#822306)
- libvirt: Define domain crash event types (rhbz#822306)
- qemu: Refactor processWatchdogEvent (rhbz#822306)
- qemu: Expose qemuProcessShutdownOrReboot() (rhbz#822306)
- qemu: Implement 'oncrash' events when guest panicked (rhbz#822306)
- qemu: Implement 'oncrash' coredump events when guest panicked (rhbz#822306)
- conf: Fix a memory leak when parsing nat port XML nodes (rhbz#851455)
- security_manager: Fix comparison (rhbz#984793)
- qemu: Prevent crash of libvirtd without guest agent configuration (rhbz#984821)
- qemu: Fix double free of returned JSON array in qemuAgentGetVCPUs() (rhbz#984821)
- qemu_agent: Add support for appending arrays to commands (rhbz#924400)
- Add support for locking domain's memory pages (rhbz#947118)
- qemu: Implement support for locking domain's memory pages (rhbz#947118)
- qemu: Check for -realtime mlock=on|off support (rhbz#947118)
- qemu: Move memory limit computation to a reusable function (rhbz#947118)
- util: New virCommandSetMax(MemLock|Processes|Files) (rhbz#947118)
- qemu: Set RLIMIT_MEMLOCK when memoryBacking/locked is used (rhbz#947118)
- Add Gluster protocol as supported network disk backend (rhbz#849796)
- qemu: Add support for gluster protocol based network storage backend. (rhbz#849796)
- tests: Add tests for gluster protocol based network disks support (rhbz#849796)