Date: Wed, 22 Apr 2009 21:58:25 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: Theodore Tso <tytso@mit.edu>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
       Andrea Righi <righi.andrea@gmail.com>, randy.dunlap@oracle.com,
       Carl Henrik Lunde <chlunde@ping.uio.no>,
       Jens Axboe <jens.axboe@oracle.com>, eric.rannaud@gmail.com,
       Balbir Singh <balbir@linux.vnet.ibm.com>, fernando@oss.ntt.co.jp,
       dradford@bluehost.com, Gui@smtp1.linux-foundation.org,
       agk@sourceware.org, subrata@linux.vnet.ibm.com,
       Paul Menage <menage@google.com>, containers@lists.linux-foundation.org,
       linux-kernel@vger.kernel.org, dave@linux.vnet.ibm.com,
       matt@bluehost.com, roberto@unbit.it, ngupta@google.com
Subject: Re: [PATCH 9/9] ext3: do not throttle metadata and journal IO
Message-Id: <20090422215825.f83e1b27.akpm@linux-foundation.org>
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	<20090423012254.GZ15541@mit.edu>
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On Thu, 23 Apr 2009 00:35:48 -0400 Theodore Tso <tytso@mit.edu> wrote:

> I hope someone like akpm is paying very close attention and auditing
> these patches both from an low-level patch cleanliness point of view
> as well as a high-level design review.

Not yet, really.  But I intend to.  Largely because I've always been
very skeptical that anyone has found a good solution to...

>  Or at least that *someone* is
> doing so and can perhaps document how all of these knobs interact.
> After all, if they are going to be separate, and someone turns the I/O
> throttling knob without bothering to turn the write throttling knob
> --- what's going to happen?  An OOM?  That's not going to be very safe
> or friendly for the sysadmin who plans to be configuring the system.

... this problem.
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