apache · nvazquez · Apr 13, 2022 · Apr 12, 2022
diff --git a/agent/conf/agent.properties b/agent/conf/agent.properties
@@ -285,3 +285,6 @@ iscsi.session.cleanup.enabled=false

 # Enable manually setting CPU's topology on KVM's VM.
 # enable.manually.setting.cpu.topology.on.kvm.vm=true
+
+# Enable/disable IO driver for Qemu / It's enabled by default on KVM agents
+# enable.io.uring=true
diff --git a/agent/src/main/java/com/cloud/agent/properties/AgentProperties.java b/agent/src/main/java/com/cloud/agent/properties/AgentProperties.java
@@ -54,6 +54,13 @@ public class AgentProperties{
     */
    public static final Property<Boolean> ENABLE_MANUALLY_SETTING_CPU_TOPOLOGY_ON_KVM_VM = new Property<Boolean>("enable.manually.setting.cpu.topology.on.kvm.vm", true);

+    /**
+     * Enable manually IO driver on KVM's VM. <br>
+     * Data type: boolean.<br>
+     * Default value: true.
+     */
+    public static final Property<Boolean> ENABLE_IO_URING = new Property<Boolean>("enable.io.uring", true);
+
    public static class Property <T>{
        private final String name;
        private final T defaultValue;

diff --git a/...rvisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/LibvirtComputingResource.java b/...rvisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/LibvirtComputingResource.java
@@ -2956,7 +2956,9 @@ private KVMPhysicalDisk getPhysicalDiskPrimaryStore(PrimaryDataStoreTO primaryDa
     * (ii) Libvirt >= 6.3.0
     */
    protected void setDiskIoDriver(DiskDef disk) {
-        if (getHypervisorLibvirtVersion() >= HYPERVISOR_LIBVIRT_VERSION_SUPPORTS_IO_URING && getHypervisorQemuVersion() >= HYPERVISOR_QEMU_VERSION_SUPPORTS_IO_URING) {
+        if (getHypervisorLibvirtVersion() >= HYPERVISOR_LIBVIRT_VERSION_SUPPORTS_IO_URING
+                && getHypervisorQemuVersion() >= HYPERVISOR_QEMU_VERSION_SUPPORTS_IO_URING
+                && AgentPropertiesFileHandler.getPropertyValue(AgentProperties.ENABLE_IO_URING)) {
            disk.setIoDriver(DiskDef.IoDriver.IOURING);
        }
    }