Re: [Qemu-devel] virtio-scsi vs. virtio-blk

[Paolo Bonzini]

Il 08/08/2012 17:21, Stefan Priebe ha scritto:
> Hello list,
> 
> i wanted to start using virtio-scsi instead of virtio-blk, cause it
> offers the possibility to use discard / trim support.
> 
> Kernel: 3.5.0 on host and guest
> Qemu-kvm: 1.1.1 stable
> 
> But i'm not seeing the same or nearly the same speed:

1) How did you start the guest?  Did you use cache=none?

2) Please try the latest qemu-kvm release.  1.1 didn't use ioeventfd for
virtio-scsi by mistake.

Paolo