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qemu: check if numa cell's cpu range match with cpu topology count

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QEMU shows a warning message if partial NUMA mapping is set. This patch
adds a warning message in libvirt when editing the XML. It must be an
error in future, when QEMU remove this ability.

Signed-off-by: Maxiwell S. Garcia <maxiwell@linux.ibm.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Maxiwell S. Garcia 2019-08-08 11:26:30 -03:00 committed by Michal Privoznik
parent b18c273a24
commit 38d2e03368
1 changed files with 14 additions and 5 deletions
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19
src/qemu/qemu_domain.c
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@ -4621,15 +4621,24 @@ qemuDomainDefValidate(const virDomainDef *def,
if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_QUERY_HOTPLUGGABLE_CPUS)) {
unsigned int topologycpus;
unsigned int granularity;
unsigned int numacpus;
/* Starting from QEMU 2.5, max vCPU count and overall vCPU topology
* must agree. We only actually enforce this with QEMU 2.7+, due
* to the capability check above */
if (virDomainDefGetVcpusTopology(def, &topologycpus) == 0 &&
topologycpus != virDomainDefGetVcpusMax(def)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("CPU topology doesn't match maximum vcpu count"));
goto cleanup;
if (virDomainDefGetVcpusTopology(def, &topologycpus) == 0) {
if (topologycpus != virDomainDefGetVcpusMax(def)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("CPU topology doesn't match maximum vcpu count"));
goto cleanup;
}
numacpus = virDomainNumaGetCPUCountTotal(def->numa);
if ((numacpus != 0) && (topologycpus != numacpus)) {
VIR_WARN("CPU topology doesn't match numa CPU count; "
"partial NUMA mapping is obsoleted and will "
"be removed in future");
}
}
/* vCPU hotplug granularity must be respected */