Re: Configure block device IO rate

[Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>]

On Mon, Nov 24, 2014 at 12:07:39PM +0000, George Dunlap wrote:
> On Mon, Nov 24, 2014 at 3:54 AM, aragrawal <aragrawal@cs.wisc.edu> wrote:
> > Hi
> >
> > I am interested in getting the block I/O rate fixed for a Virtual Machine.
> > However, it seems that there are no such options to control the block I/O
> > rate via the VM configuration file.
> > Going through the net, I see suggestions to configure the xen_blkback driver
> > using ionice to get that done.
> >
> > I would like to know if there are any plans to include any such
> > configuration option.
> > Also, are there any particular reason (apart from the fact that there are
> > other ways to get this done) for the absence of such configuration option?
> 
> I'm pretty sure it's just because nobody had asked for it yet.
> 
> We can put it on our list of things to think about doing / projects
> for people new to the community.
> 
> We also accept patches. :-)

Patches for this were in the past posted - it just that nobody explained
to the maintainer (me) why the dm-* or io-nice would not do the same job.

I sadly don't remember from whom they were or such.
> 
>  -George
> 
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