From: Chris Snook <chris.snook@gmail.com>
To: Dong-Jae Kang <baramsori72@gmail.com>
Cc: Ryo Tsuruta <ryov@valinux.co.jp>,
righi.andrea@gmail.com, menage@google.com,
balbir@linux.vnet.ibm.com, guijianfeng@cn.fujitsu.com,
kamezawa.hiroyu@jp.fujitsu.com, agk@sourceware.org,
akpm@linux-foundation.org, axboe@kernel.dk, chlunde@ping.uio.no,
dave@linux.vnet.ibm.com, dpshah@google.com,
eric.rannaud@gmail.com, fernando@oss.ntt.co.jp,
taka@valinux.co.jp, lizf@cn.fujitsu.com, matt@bluehost.com,
dradford@bluehost.com, ngupta@google.com,
randy.dunlap@oracle.com, roberto@unbit.it,
s-uchida@ap.jp.nec.com, subrata@linux.vnet.ibm.com,
yoshikawa.takuya@oss.ntt.co.jp, nauman@google.com,
fchecconi@gmail.com, paolo.valente@unimore.it,
containers@lists.linux-foundation.org,
linux-kernel@vger.kernel.org, corsetproject@googlegroups.com
Subject: Re: [PATCH 0/2] range-bw : Another I/O scheduling policy of dm-ioband (v1)
Date: Mon, 4 May 2009 09:18:37 -0400 [thread overview]
Message-ID: <13a12eea0905040618u7fc48755hdbc3ea6d87c4d68c@mail.gmail.com> (raw)
In-Reply-To: <2891419e0905040356x53643144of77eeaa8c210dce7@mail.gmail.com>
On Mon, May 4, 2009 at 6:56 AM, Dong-Jae Kang <baramsori72@gmail.com> wrote:
> range-bw has two kinds of operation modes, min-max and max mode.
> Min-max mode is to supports guaranteeing the minimum I/O requirement
> and limitation of unnecessary I/O bandwidth at the same time. And max
> mode is to support only limitation. So in case of min-max mode, you
> need to configure min-bw and max-bw values and in case of max mode,
> configure only max-bw.
Please forgive me if I missed a previous discussion, but how is max
mode different from min-max mode with a minimum of zero? I understand
that there may be some special-case optimizations you can do
internally, but it's unclear to me why you need two different
interfaces.
-- Chris
next prev parent reply other threads:[~2009-05-04 13:19 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-04 10:56 Dong-Jae Kang
2009-05-04 13:18 ` Chris Snook [this message]
2009-05-06 1:26 ` Dong-Jae Kang
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