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

On 03/24/2014 03:57 AM, Raphael Bauduin wrote: > > > > On Thu, Mar 20, 2014 at 9:13 AM, Raphael Bauduin <rblists(a)gmail.com > <mailto:rblists@gmail.com>> wrote: > > 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)? > > > Is this a stupid question or does no one use native io mode? Please let me know > dataplane is not required for io=native. io=native is used quite often in practice, just when the VM is using a host block device as storage. That's when virt-manager sets io=native at least, as recommended to use by the qemu devs.

- Cole