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Description of problem:
It needs a better error message when detecting a error for NUMA memory tuning.

Version-Release number of selected component (if applicable):
libvirt-1.1.1-13.el7.x86_64
qemu-kvm-rhev-1.5.3-20.el7.x86_64

How reproducible:
100%

Steps to Reproduce:
1. define a guest with two preferred nodes, as we known it is wrong:
# virsh edit kvm-rhel6.5-x86_64-qcow2-virtio
...
  <vcpu placement='static'>3</vcpu>
  <numatune>
    <memory mode='preferred' nodeset='2-3'/>
  </numatune>
...

2. start it, we cann't see the real error
# virsh start kvm-rhel6.5-x86_64-qcow2-virtio
error: Failed to start domain kvm-rhel6.5-x86_64-qcow2-virtio
error: Child quit during startup handshake: Input/output error

3. check out qemu.log
# tail /var/log/libvirt/qemu/kvm-rhel6.5-x86_64-qcow2-virtio.log
libvirt:  error : internal error: NUMA memory tuning in 'preferred' mode only supports single node

Actual results:
error message is hide in qemu.log

Expected results:
show error message when virsh return.

Patch proposed upstream:

https://www.redhat.com/archives/libvir-list/2013-December/msg00210.html

Moving to POST:

http://post-office.corp.redhat.com/archives/rhvirt-patches/2013-December/msg00230.html

This fix is verified on libvirt-1.1.1-15.el7:
# virsh edit virt-tests-vm1
...
  <vcpu placement='static'>3</vcpu>
  <numatune>
    <memory mode='preferred' nodeset='2-3'/>
  </numatune>
...

# virsh start virt-tests-vm1
error: Failed to start domain virt-tests-vm1
error: internal error: Process exited prior to exec: libvirt:  error : internal error: Nodeset is out of range, host cannot support NUMA node bigger than 3

So I change the status to VERIFIED.

This request was resolved in Red Hat Enterprise Linux 7.0.

Contact your manager or support representative in case you have further questions about the request.