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qemu: add support for offline vcpupin

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Allow pinning for inactive vcpus. The pinning mask will be automatically
applied as we would apply the default mask in case of a cpu hotplug.

Setting the scheduler settings for a vcpu has the same semantics.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1306556
This commit is contained in:
Peter Krempa 2016-02-12 14:57:45 +01:00
parent acf521e121
commit 02ae21deb3
2 changed files with 24 additions and 41 deletions
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3
src/qemu/qemu_domain.c
View File

@ -1620,7 +1620,8 @@ qemuDomainDeviceDefPostParse(virDomainDeviceDefPtr dev,
virDomainDefParserConfig virQEMUDriverDomainDefParserConfig = {
.devicesPostParseCallback = qemuDomainDeviceDefPostParse,
.domainPostParseCallback = qemuDomainDefPostParse,
.features = VIR_DOMAIN_DEF_FEATURE_MEMORY_HOTPLUG,
.features = VIR_DOMAIN_DEF_FEATURE_MEMORY_HOTPLUG |
VIR_DOMAIN_DEF_FEATURE_OFFLINE_VCPUPIN
};

62
src/qemu/qemu_driver.c
View File

@ -4760,9 +4760,6 @@ qemuDomainHotplugDelVcpu(virQEMUDriverPtr driver,
VIR_CGROUP_THREAD_VCPU, vcpu) < 0)
goto cleanup;
virBitmapFree(vcpuinfo->cpumask);
vcpuinfo->cpumask = NULL;
ret = 0;
cleanup:
@ -5022,36 +5019,19 @@ qemuDomainPinVcpuFlags(virDomainPtr dom,
priv = vm->privateData;
if (def) {
if (!(vcpuinfolive = virDomainDefGetVcpu(def, vcpu))) {
virReportError(VIR_ERR_INVALID_ARG,
_("vcpu %d is out of range of live cpu count %d"),
vcpu, virDomainDefGetVcpus(def));
goto endjob;
}
if (!vcpuinfolive->online) {
virReportError(VIR_ERR_OPERATION_INVALID,
_("setting cpu pinning for inactive vcpu '%d' is not "
"supported"), vcpu);
goto endjob;
}
if (def && !(vcpuinfolive = virDomainDefGetVcpu(def, vcpu))) {
virReportError(VIR_ERR_INVALID_ARG,
_("vcpu %d is out of range of live cpu count %d"),
vcpu, virDomainDefGetVcpus(def));
goto endjob;
}
if (persistentDef) {
if (!(vcpuinfopersist = virDomainDefGetVcpu(persistentDef, vcpu))) {
virReportError(VIR_ERR_INVALID_ARG,
_("vcpu %d is out of range of persistent cpu count %d"),
vcpu, virDomainDefGetVcpus(persistentDef));
goto endjob;
}
if (!vcpuinfopersist->online) {
virReportError(VIR_ERR_OPERATION_INVALID,
_("setting cpu pinning for inactive vcpu '%d' is not "
"supported"), vcpu);
goto endjob;
}
if (persistentDef &&
!(vcpuinfopersist = virDomainDefGetVcpu(persistentDef, vcpu))) {
virReportError(VIR_ERR_INVALID_ARG,
_("vcpu %d is out of range of persistent cpu count %d"),
vcpu, virDomainDefGetVcpus(persistentDef));
goto endjob;
}
if (!(pcpumap = virBitmapNewData(cpumap, maplen)))
@ -5074,18 +5054,20 @@ qemuDomainPinVcpuFlags(virDomainPtr dom,
goto endjob;
}
/* Configure the corresponding cpuset cgroup before set affinity. */
if (virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPUSET)) {
if (virCgroupNewThread(priv->cgroup, VIR_CGROUP_THREAD_VCPU, vcpu,
false, &cgroup_vcpu) < 0)
goto endjob;
if (qemuSetupCgroupCpusetCpus(cgroup_vcpu, pcpumap) < 0)
if (vcpuinfolive->online) {
/* Configure the corresponding cpuset cgroup before set affinity. */
if (virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPUSET)) {
if (virCgroupNewThread(priv->cgroup, VIR_CGROUP_THREAD_VCPU, vcpu,
false, &cgroup_vcpu) < 0)
goto endjob;
if (qemuSetupCgroupCpusetCpus(cgroup_vcpu, pcpumap) < 0)
goto endjob;
}
if (virProcessSetAffinity(qemuDomainGetVcpuPid(vm, vcpu), pcpumap) < 0)
goto endjob;
}
if (virProcessSetAffinity(qemuDomainGetVcpuPid(vm, vcpu), pcpumap) < 0)
goto endjob;
virBitmapFree(vcpuinfolive->cpumask);
vcpuinfolive->cpumask = pcpumaplive;
pcpumaplive = NULL;