From: Yi Wang <wang.yi59(a)zte.com.cn&gt; vcpupin will fail when maxvcpus is larger than current vcpu: virsh vcpupin win7 --vcpu 0 --cpulist 5-6 error: Requested operation is not valid: cpu affinity is not supported win7 xml in the command above is like below: ... <vcpu current="3" placement="static">8</vcpu> ... This issue is caused by qemuDomainRefreshVcpuInfo(), which mistake to make validTIDs false and not set vcpu tid because vcpu[3] and vcpu[4] have duplicate zero tids. This patch fix this. Signed-off-by: Yi Wang <wang.yi59(a)zte.com.cn&gt; --- src/qemu/qemu_domain.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index ac01e86..6987550 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -10701,6 +10701,9 @@ qemuDomainRefreshVcpuInfo(virQEMUDriverPtr driver, * impl which we can support. */ for (i = 0; i < maxvcpus && validTIDs; i++) { + if (vm->def->virtType != VIR_DOMAIN_VIRT_QEMU) + break; + if (info[i].tid == vm->pid) { VIR_DEBUG("vCPU[%zu] PID %llu duplicates process", i, (unsigned long long)info[i].tid); -- 1.8.3.1