Some paravirtualized drivers are required for the kvm provisioning adapter to function correctly when the Save Config action is applied:
virtio_net: A device driver required to support the virtual network.
virtio_blk: A virtual block device driver required for supporting paravirtualized block devices.
virtio_balloon: A memory driver for dynamic memory allocation required for supporting the dynamic change of the amount of memory allocated to a VM.
The table below lists the supported VM functionality when the Save Config action is applied. An “x” in the table indicates support for the function. Required drivers for each platform are noted below the table.
Table C-2 Supported Disk, NIC, and Memory Setting Functionality on KVM VMs after Save Config Action Applied
|
Function |
SLES 11 SP1 VM1 |
SLES 10 SP3 VM2 |
RHEL 5 VM3 |
|---|---|---|---|
|
Attach IDE disk |
x |
x |
x |
|
Detach IDE disk |
x |
x |
x |
|
Insert DVD / CD-ROM media into IDE disk |
x |
x |
x |
|
Eject DVD / CD-ROM media from IDE disk |
x |
x |
x |
|
Attach USB disk |
x |
x |
x |
|
Detach USB disk |
x |
x |
x |
|
Attach SCSI disk |
x |
x |
x |
|
Detach SCSI disk |
x |
x |
x |
|
Attach Virtio disk |
x |
x |
x |
|
Detach Virtio disk |
x |
x |
x |
|
Attach virtual NIC |
x |
x |
x |
|
Detach virtual NIC |
x |
x |
x |
|
Set current memory |
x |
x |
x |
|
Set max memory |
x |
x |
x |
1 Paravirtualized virtio drivers are included in the kernel of SUSE Linux Enterprise Server 11 SP1 and newer.
2 SUSE Linux Enterprise Server 10 SP3 does not support para-virtualized devices out of the box, because the virtio_* drivers are not included. In order to use such devices, add the missing virtio drivers during the installation. For more information, see Section 5.3.1, “Adding para-virtualized Drivers During the Installation” in the “Managing Virtual Machines with libvirt” section of the “SLES 11 Virtualization with KVM Administration Guide.”
These drivers are available at the Novell virtio Drivers Download Web site .
3 Paravirtualized virtio drivers are included in the kernel of Red Hat Enterprise Linux 5.4 and newer.