[libvirt-users] io mode=native precisions

Hi, Before switching to io mode=native, I wanted to check if there are any disadvantages or potential problem with this setting. I virtio-blk data plane required to use this setting effectively? (as illustrated here: http://blog.vmsplice.net/2013/03/new-in-qemu-14-high-performance-virtio.html) Is there a requirement on the host kernel (eg minimum version)? Thanks in advance Raph