[Users] RHEL 5.x on oVirt - high CPU on KVM-host

[Winfried de Heiden]

Running both CentosOS 5.x and RHEL 5.x with all te latest patches gives 
a rather high CPU-load on the KVM-host, even when the machine is doing 
nothing. On the virtual server CPU-load is almost 0%.

Installingen ktune and chaning the I/O scheduler to cfq gives a small 
change, CPU-load drops from apr. 26% to 19%. Adding devider=10 to the 
kernel parameters gives no improvement. Both nic and disk use virtio.

It seems to be a kernel problem (there numerous thing to find on the 
internet) but anyone knows a solution?

Winfried