virtio issues

[aragonx@xxxxxxxxxx]

Hello all,

I have just started working with KVM and
virtualization in general.  I have setup a client using Suse 9.3 x64
as the base and Fedora 15 x64 as the host.  The kernel in the client
has been upgraded to a custom 2.6.28.4 build.

Everything seems
to be working fine but I wanted to get some more disk performance so I'm
trying to get virtio running.  I don't care too much about the disk
the base OS is running on but I have a drive that I'm trying to add that I
want to use the virtio for.  I can add the drive using IDE or SCSI
drivers and it works fine (just slower had hoped).  If, however, I
switch to virtio, it doesn't show up in the client.

If I used
edit from virsh, I see:

<domain type='kvm'>
 
<name>MC1DB</name>
 
<uuid>f57c6236-2595-57ca-595b-aaaef4de87ea</uuid>
 
<memory>7680000</memory>
 
<currentMemory>7680000</currentMemory>
 
<vcpu>4</vcpu>
  <os>
   
<type arch='x86_64'
machine='pc-0.14'>hvm</type>
   
<boot
dev='hd'/>
   
<bootmenu
enable='no'/>
  </os>
 
<features>
    <acpi/>
    <apic/>
    <pae/>
  </features>
  <clock offset='utc'/>
  <on_poweroff>destroy</on_poweroff>
 
<on_reboot>restart</on_reboot>
 
<on_crash>restart</on_crash>
  <devices>
    <emulator>/usr/bin/qemu-kvm</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='raw'/>
      <source file='/img/mc1db.img'/>
      <target dev='hda' bus='ide'/>
      <address type='drive'
controller='0'
bus='0' unit='0'/>
   
</disk>
    <disk type='block'
device='cdrom'>
      <driver
name='qemu' type='raw'/>
     
<source
dev='/dev/sr0'/>
     
<target
dev='hdc' bus='ide'/>
     
<readonly/>
      <address
type='drive'
controller='0'
bus='1' unit='0'/>
   
</disk>
    <disk
type='block'
device='disk'>
     
<driver
name='qemu' type='raw'/>
     
<source dev='/dev/sda1'/>
     
<target dev='vda' bus='virtio'/>
     
<address type='pci'
domain='0x0000'
bus='0x00' slot='0x07'
function='0x0'/>
   
</disk>
   
<controller type='ide'
index='0'>
      <address type='pci'
domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
    </controller>
   
<controller type='scsi' index='0'>
      <address type='pci' domain='0x0000'
bus='0x00' slot='0x06' function='0x0'/>
   
</controller>
    <interface
type='network'>
      <mac
address='52:54:00:fc:de:e0'/>
     
<source network='default'/>
     
<address type='pci' domain='0x0000' bus='0x00' slot='0x03'
function='0x0'/>
    </interface>
    <serial type='pty'>
      <target port='0'/>
    </serial>
   
<console
type='pty'>
     
<target
type='serial' port='0'/>
   
</console>
    <input type='mouse'
bus='ps2'/>
    <graphics type='vnc'
port='-1'
autoport='yes'/>
    <sound
model='ich6'>
      <address
type='pci' domain='0x0000'
bus='0x00' slot='0x04'
function='0x0'/>
   
</sound>
    <video>
     
<model type='cirrus' vram='9216'
heads='1'/>
      <address type='pci'
domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
    </video>
   
<memballoon
model='virtio'>
     
<address
type='pci'
domain='0x0000' bus='0x00' slot='0x05'
function='0x0'/>
    </memballoon>
 
</devices>
</domain>


Can someone tell
me what I'm doing wrong?  I'm stumped.  And would it make a
difference if I use virtio for the base disk also?




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