[libvirt] Problem with setting up KVM guests to use HugePages

[Vivi L]

Kashyap Chamarthy <kchamart <at> redhat.com> writes:


> You might want re-test by explicitly setting the 'page' element and
> 'size' attribute? From my test, I had something like this:
> 
>     $ virsh dumpxml f21-vm | grep hugepages -B3 -A2 
>       <memory unit='KiB'>2000896</memory>
>       <currentMemory unit='KiB'>2000000</currentMemory>
>       <memoryBacking>
>         <hugepages>
>           <page size='2048' unit='KiB' nodeset='0'/>
>         </hugepages>
>       </memoryBacking>
>       <vcpu placement='static'>8</vcpu>
> 
> I haven't tested this exhaustively, but some basic test notes here:
> 
>     https://kashyapc.fedorapeople.org/virt/test-hugepages-with-libvirt.txt

Current QEMU does not support setting <page> element. Could it be the 
cause of my aforementioned problem?

unsupported configuration: huge pages per NUMA node are not supported 
with this QEMU