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From: Rik van Riel <riel@redhat.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Vivek Goyal <vgoyal@redhat.com>,
linux-kernel@vger.kernel.org,
containers@lists.linux-foundation.org,
virtualization@lists.linux-foundation.org, jens.axboe@oracle.com,
Hirokazu Takahashi <taka@valinux.co.jp>,
Ryo Tsuruta <ryov@valinux.co.jp>,
Andrea Righi <righi.andrea@gmail.com>,
Satoshi UCHIDA <s-uchida@ap.jp.nec.com>,
fernando@oss.ntt.co.jp, balbir@linux.vnet.ibm.com,
Andrew Morton <akpm@linux-foundation.org>,
menage@google.com, ngupta@google.com,
Jeff Moyer <jmoyer@redhat.com>
Subject: Re: [patch 0/4] [RFC] Another proportional weight IO controller
Date: Thu, 06 Nov 2008 11:47:47 -0500 [thread overview]
Message-ID: <49131FB3.4060807@redhat.com> (raw)
In-Reply-To: <1225988173.7803.4723.camel@twins>
Peter Zijlstra wrote:
> Nice, although I would think only doing the higher level devices makes
> more sense than only doing the leafs.
I'm not convinced.
Say that you have two resource groups on a bunch of LVM
volumes across two disks.
If one of the resource groups only sends requests to one
of the disks, the other resource group should be able to
get all of its requests through immediateley at the other
disk.
Holding up the second resource group's requests could
result in a disk being idle. Worse, once that cgroup's
requests finally make it through, the other cgroup might
also want to use the disk and they both get slowed down.
When a resource is uncontended, should a potential user
be made to wait?
--
All rights reversed.
next prev parent reply other threads:[~2008-11-06 16:48 UTC|newest]
Thread overview: 103+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-06 15:30 vgoyal
2008-11-06 15:30 ` [patch 1/4] io controller: documentation vgoyal
2008-11-07 2:32 ` KAMEZAWA Hiroyuki
2008-11-07 14:27 ` Vivek Goyal
2008-11-10 2:48 ` Li Zefan
2008-11-10 13:44 ` Vivek Goyal
2008-11-06 15:30 ` [patch 2/4] io controller: biocgroup implementation vgoyal
2008-11-07 2:50 ` KAMEZAWA Hiroyuki
2008-11-07 4:19 ` Hirokazu Takahashi
2008-11-07 14:44 ` Vivek Goyal
2008-11-06 15:30 ` [patch 3/4] io controller: Core IO controller implementation logic vgoyal
2008-11-07 3:21 ` KAMEZAWA Hiroyuki
2008-11-07 14:50 ` Vivek Goyal
2008-11-08 2:35 ` [patch 3/4] io controller: Core IO controller implementationlogic KAMEZAWA Hiroyuki
2008-11-11 8:50 ` [patch 3/4] io controller: Core IO controller implementation logic Gui Jianfeng
2008-11-06 15:30 ` [patch 4/4] io controller: Put IO controller to use in device mapper and standard make_request() function vgoyal
2008-11-06 15:49 ` [patch 0/4] [RFC] Another proportional weight IO controller Peter Zijlstra
2008-11-06 16:01 ` Vivek Goyal
2008-11-06 16:16 ` Peter Zijlstra
2008-11-06 16:39 ` Vivek Goyal
2008-11-06 16:52 ` Peter Zijlstra
2008-11-06 16:57 ` Rik van Riel
2008-11-06 17:11 ` Peter Zijlstra
2008-11-07 0:41 ` Dave Chinner
2008-11-07 10:31 ` Peter Zijlstra
2008-11-09 9:40 ` Dave Chinner
2008-11-06 17:08 ` Vivek Goyal
2008-11-06 23:07 ` Nauman Rafique
2008-11-07 14:19 ` Vivek Goyal
2008-11-07 21:36 ` Nauman Rafique
2008-11-10 14:11 ` Vivek Goyal
2008-11-11 19:55 ` Nauman Rafique
2008-11-11 22:30 ` Vivek Goyal
2008-11-12 21:20 ` Nauman Rafique
2008-11-13 13:49 ` Fabio Checconi
2008-11-13 18:08 ` Vivek Goyal
2008-11-13 19:15 ` Fabio Checconi
2008-11-13 22:27 ` Nauman Rafique
2008-11-13 23:10 ` Fabio Checconi
2008-11-14 4:58 ` Satoshi UCHIDA
2008-11-14 8:02 ` Peter Zijlstra
2008-11-14 10:06 ` Satoshi UCHIDA
2008-11-06 16:47 ` Rik van Riel [this message]
2008-11-07 2:36 ` Gui Jianfeng
2008-11-07 13:38 ` Vivek Goyal
2008-11-13 9:05 ` Ryo Tsuruta
2008-11-13 15:58 ` Vivek Goyal
2008-11-13 18:41 ` Divyesh Shah
2008-11-13 21:46 ` Vivek Goyal
2008-11-13 22:57 ` Divyesh Shah
2008-11-14 16:05 ` Vivek Goyal
2008-11-14 22:44 ` Nauman Rafique
2008-11-17 14:23 ` Vivek Goyal
2008-11-18 2:02 ` Li Zefan
2008-11-18 5:01 ` Nauman Rafique
2008-11-18 7:42 ` Li Zefan
2008-11-18 22:23 ` Nauman Rafique
2008-11-18 12:05 ` Fabio Checconi
2008-11-18 14:07 ` Vivek Goyal
2008-11-18 14:41 ` Fabio Checconi
2008-11-18 19:12 ` Jens Axboe
2008-11-18 19:47 ` Vivek Goyal
2008-11-18 21:14 ` Fabio Checconi
2008-11-19 1:52 ` Aaron Carroll
2008-11-19 10:17 ` Fabio Checconi
2008-11-19 11:06 ` Fabio Checconi
2008-11-20 4:45 ` Aaron Carroll
2008-11-20 6:56 ` Fabio Checconi
2008-11-19 14:30 ` Jens Axboe
2008-11-19 15:52 ` Fabio Checconi
2008-11-18 23:07 ` Nauman Rafique
2008-11-19 14:24 ` Jens Axboe
2008-11-20 0:12 ` Divyesh Shah
2008-11-20 8:16 ` Jens Axboe
2008-11-20 13:40 ` Vivek Goyal
2008-11-20 19:54 ` Nauman Rafique
2008-11-20 21:15 ` Vivek Goyal
2008-11-20 22:42 ` Nauman Rafique
2008-11-21 15:22 ` Vivek Goyal
2008-11-26 6:40 ` Fernando Luis Vázquez Cao
2008-11-26 15:18 ` Vivek Goyal
2008-11-20 21:31 ` Vivek Goyal
2008-11-21 3:05 ` Fabio Checconi
2008-11-21 14:58 ` Vivek Goyal
2008-11-21 15:21 ` Fabio Checconi
2008-11-18 22:33 ` Nauman Rafique
2008-11-18 23:44 ` Fabio Checconi
2008-11-19 7:09 ` Paolo Valente
2008-11-13 22:13 ` Vivek Goyal
2008-11-20 9:20 ` Ryo Tsuruta
2008-11-20 13:47 ` Vivek Goyal
2008-11-25 2:33 ` Ryo Tsuruta
2008-11-25 16:27 ` Vivek Goyal
2008-11-25 22:38 ` Nauman Rafique
2008-11-26 14:06 ` Paolo Valente
2008-11-26 19:41 ` Nauman Rafique
2008-11-26 22:21 ` Fabio Checconi
2008-11-26 11:55 ` Fernando Luis Vázquez Cao
2008-11-26 12:47 ` Ryo Tsuruta
2008-11-26 16:08 ` Vivek Goyal
2008-11-27 8:43 ` Fernando Luis Vázquez Cao
2008-11-28 3:09 ` Ryo Tsuruta
2008-11-28 13:33 ` Ryo Tsuruta
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