LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Ryo Tsuruta <ryov@valinux.co.jp>
To: fernando@oss.ntt.co.jp
Cc: vgoyal@redhat.com, linux-kernel@vger.kernel.org,
	containers@lists.linux-foundation.org,
	virtualization@lists.linux-foundation.org, jens.axboe@oracle.com,
	taka@valinux.co.jp, righi.andrea@gmail.com,
	s-uchida@ap.jp.nec.com, balbir@linux.vnet.ibm.com,
	akpm@linux-foundation.org, menage@google.com, ngupta@google.com,
	riel@redhat.com, jmoyer@redhat.com, peterz@infradead.org,
	fchecconi@gmail.com, paolo.valente@unimore.it
Subject: Re: [patch 0/4] [RFC] Another proportional weight IO controller
Date: Fri, 28 Nov 2008 12:09:54 +0900 (JST)	[thread overview]
Message-ID: <20081128.120954.1024833258536769313.ryov@valinux.co.jp> (raw)
In-Reply-To: <1227775382.7443.43.camel@sebastian.kern.oss.ntt.co.jp>

Hi,

> > > I don't come up with any use case, but I would like to make the
> > > resource controller more flexible. Actually, a certain block device
> > > that I'm using does not use the I/O scheduler.
> > 
> > Isn't it equivalent to using No-op? If yes, then it should not be an
> > issue?
> 
> No, it is not equivalent. When using devices drivers that provide their
> own make_request_fn() (check for devices that invoke
> blk_queue_make_request() at initialization time) bios entering the block
> layer can go directly to the device driver and from there to the device.

As Fernando said, that device driver invokes blk_queue_make_request(),

Thanks,
Ryo Tsuruta

  reply	other threads:[~2008-11-28  3:10 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
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 [this message]
2008-11-28 13:33                   ` Ryo Tsuruta

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20081128.120954.1024833258536769313.ryov@valinux.co.jp \
    --to=ryov@valinux.co.jp \
    --cc=akpm@linux-foundation.org \
    --cc=balbir@linux.vnet.ibm.com \
    --cc=containers@lists.linux-foundation.org \
    --cc=fchecconi@gmail.com \
    --cc=fernando@oss.ntt.co.jp \
    --cc=jens.axboe@oracle.com \
    --cc=jmoyer@redhat.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=menage@google.com \
    --cc=ngupta@google.com \
    --cc=paolo.valente@unimore.it \
    --cc=peterz@infradead.org \
    --cc=riel@redhat.com \
    --cc=righi.andrea@gmail.com \
    --cc=s-uchida@ap.jp.nec.com \
    --cc=taka@valinux.co.jp \
    --cc=vgoyal@redhat.com \
    --cc=virtualization@lists.linux-foundation.org \
    --subject='Re: [patch 0/4] [RFC] Another proportional weight IO controller' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).