[Qemu-devel] slow speed for virtio-scsi since qemu 2.2

[Stefan Priebe]

Hi,

while i get a constant random 4k i/o write speed of 20.000 iops with 
qemu 2.1.0 or 2.1.3. I get jumping speeds with qemu 2.2 (jumping between 
500 iops and 15.000 iop/s).

If i use virtio instead of virtio-scsi speed is the same between 2.2 and 
2.1.

Is there a known regression?

Greets,
Stefan