[dm-devel] Re: dm-ioband: Test results.
Mike Snitzer
snitzer at redhat.com
Tue Apr 21 13:57:23 UTC 2009
On Tue, Apr 21 2009 at 8:10am -0400,
Ryo Tsuruta <ryov at valinux.co.jp> wrote:
> Hi Nauman,
>
> > > The real question is, once you create a version of dm-ioband that
> > > co-operates with CFQ scheduler, how that solution would compare with
> > > the patch set Vivek has posted? In my opinion, we need to converge to
> > > one solution as soon as possible, so that we can work on it together
> > > to refine and test it.
> >
> > I think I can do some help for your work. but I want to continue the
> > development of dm-ioband, because dm-ioband actually works well and
> > I think it has some advantages against other IO controllers.
> > - It can use without cgroup.
> > - It can control bandwidth on a per partition basis.
> > - The driver module can be replaced without stopping the system.
>
> In addition, dm-ioband can run on the RHEL5.
RHEL5 compatibility does not matter relative to merging an I/O bandwidth
controller upstream. So both the "can [be] use without cgroup" and "can
run on RHEL5" features do not help your cause of getting dm-ioband
merged upstream. In fact these features serve as distractions.
Mike
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