Re: [Qemu-devel] [RFC]QEMU disk I/O limits

[Anthony Liguori]

On 05/31/2011 08:45 AM, Vivek Goyal wrote:
> On Mon, May 30, 2011 at 01:09:23PM +0800, Zhi Yong Wu wrote:
> > Hello, all,
> >
> >      I have prepared to work on a feature called "Disk I/O limits" for qemu-kvm 
> > projeect.
> >      This feature will enable the user to cap disk I/O amount performed by a 
> > VM.It is important for some storage resources to be shared among multi-VMs. As 
> > you've known, if some of VMs are doing excessive disk I/O, they will hurt the 
> > performance of other VMs.
>
> Hi Zhiyong,
>
> Why not use kernel blkio controller for this and why reinvent the wheel
> and implement the feature again in qemu?

blkio controller only works for block devices.  It doesn't work when 
using files.

Regards,

Anthony Liguori