[libvirt] [PATCH 2/3] qemu: process: Fix start with unpluggable vcpus with NUMA pinning
Similarly to vcpu hotplug the emulator thread cgroup numa mapping needs
to be relaxed while hot-adding vcpus so that the threads can allocate
data in the DMA zone.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1370084
---
src/qemu/qemu_process.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index ec6b547..e6e91df 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -4864,6 +4864,8 @@ qemuProcessSetupHotpluggableVcpus(virQEMUDriverPtr driver,
qemuDomainAsyncJob asyncJob)
{
unsigned int maxvcpus = virDomainDefGetVcpusMax(vm->def);
+ qemuDomainObjPrivatePtr priv = vm->privateData;
+ qemuCgroupEmulatorAllNodesDataPtr emulatorCgroup = NULL;
virDomainVcpuDefPtr vcpu;
qemuDomainVcpuPrivatePtr vcpupriv;
virJSONValuePtr vcpuprops = NULL;
@@ -4896,6 +4898,9 @@ qemuProcessSetupHotpluggableVcpus(virQEMUDriverPtr driver,
qsort(bootHotplug, nbootHotplug, sizeof(*bootHotplug),
qemuProcessVcpusSortOrder);
+ if (qemuCgroupEmulatorAllNodesAllow(priv->cgroup, &emulatorCgroup) < 0)
+ goto cleanup;
+
for (i = 0; i < nbootHotplug; i++) {
vcpu = bootHotplug[i];
@@ -4920,6 +4925,7 @@ qemuProcessSetupHotpluggableVcpus(virQEMUDriverPtr driver,
ret = 0;
cleanup:
+ qemuCgrouEmulatorAllNodesRestore(emulatorCgroup);
VIR_FREE(bootHotplug);
virJSONValueFree(vcpuprops);
return ret;
--
2.10.0