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Re: IO scheduler based IO Controller V2

From:  Andrew Morton <akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b-AT-public.gmane.org>
To:  Vivek Goyal <vgoyal-H+wXaHxf7aLQT0dZR+AlfA-AT-public.gmane.org>
Subject:  Re: IO scheduler based IO Controller V2
Date:  Tue, 5 May 2009 13:24:41 -0700
Message-ID:  <20090505132441.1705bfad.akpm@linux-foundation.org>
Cc:  dhaval-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8-AT-public.gmane.org, snitzer-H+wXaHxf7aLQT0dZR+AlfA-AT-public.gmane.org, dm-devel-H+wXaHxf7aLQT0dZR+AlfA-AT-public.gmane.org, jens.axboe-QHcLZuEGTsvQT0dZR+AlfA-AT-public.gmane.org, agk-H+wXaHxf7aLQT0dZR+AlfA-AT-public.gmane.org, balbir-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8-AT-public.gmane.org, paolo.valente-rcYM44yAMweonA0d6jMUrA-AT-public.gmane.org, fernando-gVGce1chcLdL9jVzuh4AOg-AT-public.gmane.org, jmoyer-H+wXaHxf7aLQT0dZR+AlfA-AT-public.gmane.org, fchecconi-Re5JQEeQqe8AvxtiuMwx3w-AT-public.gmane.org, containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA-AT-public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA-AT-public.gmane.org, righi.andrea-Re5JQEeQqe8AvxtiuMwx3w-AT-public.gmane.org
Archive-link:  Article

On Tue,  5 May 2009 15:58:27 -0400
Vivek Goyal <vgoyal-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> wrote:

> 
> Hi All,
> 
> Here is the V2 of the IO controller patches generated on top of 2.6.30-rc4.
> ...
> Currently primarily two other IO controller proposals are out there.
> 
> dm-ioband
> ---------
> This patch set is from Ryo Tsuruta from valinux.
> ...
> IO-throttling
> -------------
> This patch set is from Andrea Righi provides max bandwidth controller.

I'm thinking we need to lock you guys in a room and come back in 15 minutes.

Seriously, how are we to resolve this?  We could lock me in a room and
cmoe back in 15 days, but there's no reason to believe that I'd emerge
with the best answer.

I tend to think that a cgroup-based controller is the way to go. 
Anything else will need to be wired up to cgroups _anyway_, and that
might end up messy.


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