linux-kernel - [PATCH 0/2] dm-ioband: I/O bandwidth controller v1.0.0: Introduction

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Date:	Mon, 19 May 2008 17:22:38 +0900 (JST)
From:	Ryo Tsuruta <ryov@...inux.co.jp>
To:	linux-kernel@...r.kernel.org, dm-devel@...hat.com,
	containers@...ts.linux-foundation.org,
	virtualization@...ts.linux-foundation.org,
	xen-devel@...ts.xensource.com
Cc:	agk@...rceware.org
Subject: [PATCH 0/2] dm-ioband: I/O bandwidth controller v1.0.0:
 Introduction

Hi everyone,

This is dm-ioband version 1.0.0 release.

Dm-ioband is an I/O bandwidth controller implemented as a device-mapper
driver, which gives specified bandwidth to each job running on the same
physical device.

- Can be applied to the kernel 2.6.26-rc2-mm1.
- Changes from 0.0.4 (24th April):
    - Performance tuning
      - A new bandwidth control policy is added. This policy controls
        bandwidth based on the number of I/O sectors instead of the
	number of I/O requests.
	I think it would be useful for some applications such as video
	streaming or when you want to use high-end storages.
       - Control read and write requests separately. So even if a
         write I/O queue in an elevator is full, read I/O requests
	 won't be blocked.
      - More accurate bandwidth control.
    - Code cleanups. Remove the "LINUX_VERSION_CODE" and "inline" stuff.
    - Fix panic on "dmsetup suspend."

For more details, please refer to:
http://people.valinux.co.jp/~ryov/dm-ioband/

Thanks,
Ryo Tsuruta
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