From: Vivek Goyal <vgoyal@redhat.com>
To: Tejun Heo <tj@kernel.org>
Cc: Fengguang Wu <fengguang.wu@intel.com>, Jan Kara <jack@suse.cz>,
Jens Axboe <axboe@kernel.dk>,
linux-mm@kvack.org, sjayaraman@suse.com, andrea@betterlinux.com,
jmoyer@redhat.com, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org, kamezawa.hiroyu@jp.fujitsu.com,
lizefan@huawei.com, containers@lists.linux-foundation.org,
cgroups@vger.kernel.org, ctalbott@google.com, rni@google.com,
lsf@lists.linux-foundation.org
Subject: Re: [RFC] writeback and cgroup
Date: Mon, 23 Apr 2012 08:30:11 -0400 [thread overview]
Message-ID: <20120423123011.GA8103@redhat.com> (raw)
In-Reply-To: <20120420213301.GA29134@google.com>
On Fri, Apr 20, 2012 at 02:33:01PM -0700, Tejun Heo wrote:
> On Fri, Apr 20, 2012 at 03:29:30PM -0400, Vivek Goyal wrote:
> > I am personally is not too excited about the case of putting async IO
> > in separate groups due to the reason that async IO of one group will
> > start impacting latencies of sync IO of another group and in practice
> > it might not be desirable. But there are others who have use cases for
> > separate async IO queue. So as long as switch is there to change the
> > behavior, I am not too worried.
>
> Why not just fix cfq so that it prefers groups w/ sync IOs?
Yes that could possibly be done but now that's change of requirements. Now
we are saying that I want one buffered write to go faster than other
buffered write only if there is no sync IO present in any of the groups.
Thanks
Vivek
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2012-04-23 12:30 UTC|newest]
Thread overview: 81+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-03 18:36 [RFC] writeback and cgroup Tejun Heo
2012-04-04 14:51 ` Vivek Goyal
[not found] ` <20120404145134.GC12676-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-04 15:36 ` [Lsf] " Steve French
2012-04-04 18:56 ` Tejun Heo
2012-04-04 19:19 ` Vivek Goyal
[not found] ` <20120404191918.GK12676-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-25 8:47 ` Suresh Jayaraman
2012-04-04 18:49 ` Tejun Heo
2012-04-04 19:23 ` [Lsf] " Steve French
2012-04-14 12:15 ` Peter Zijlstra
2012-04-04 20:32 ` Vivek Goyal
[not found] ` <20120404203239.GM12676-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-04 23:02 ` Tejun Heo
[not found] ` <20120404184909.GB29686-RcKxWJ4Cfj1J2suj2OqeGauc2jM2gXBXkQQo+JxHRPFibQn6LdNjmg@public.gmane.org>
2012-04-05 16:38 ` Tejun Heo
[not found] ` <20120405163854.GE12854-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2012-04-05 17:13 ` Vivek Goyal
2012-04-14 11:53 ` [Lsf] " Peter Zijlstra
2012-04-07 8:00 ` Jan Kara
[not found] ` <20120407080027.GA2584-+0h/O2h83AeN3ZZ/Hiejyg@public.gmane.org>
2012-04-10 16:23 ` [Lsf] " Steve French
2012-04-10 18:16 ` Vivek Goyal
2012-04-10 18:06 ` Vivek Goyal
[not found] ` <20120410180653.GJ21801-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-10 21:05 ` Jan Kara
2012-04-10 21:20 ` Vivek Goyal
2012-04-10 22:24 ` Jan Kara
[not found] ` <20120410222425.GF4936-+0h/O2h83AeN3ZZ/Hiejyg@public.gmane.org>
2012-04-11 15:40 ` Vivek Goyal
2012-04-11 15:45 ` Vivek Goyal
2012-04-11 17:05 ` Jan Kara
2012-04-11 17:23 ` Vivek Goyal
[not found] ` <20120411172311.GF16692-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-11 19:44 ` Jan Kara
[not found] ` <20120411170542.GB16008-+0h/O2h83AeN3ZZ/Hiejyg@public.gmane.org>
2012-04-17 21:48 ` Tejun Heo
2012-04-18 18:18 ` Vivek Goyal
2012-04-11 19:22 ` Jan Kara
[not found] ` <20120411192231.GF16008-+0h/O2h83AeN3ZZ/Hiejyg@public.gmane.org>
2012-04-12 20:37 ` Vivek Goyal
2012-04-12 20:51 ` Tejun Heo
[not found] ` <20120412205148.GA24056-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2012-04-14 14:36 ` Fengguang Wu
2012-04-16 14:57 ` Vivek Goyal
2012-04-24 11:33 ` Fengguang Wu
2012-04-24 14:56 ` Jan Kara
2012-04-24 15:58 ` Vivek Goyal
[not found] ` <20120424155843.GG26708-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-25 2:42 ` Fengguang Wu
[not found] ` <20120424145655.GA1474-+0h/O2h83AeN3ZZ/Hiejyg@public.gmane.org>
2012-04-25 3:16 ` Fengguang Wu
2012-04-25 9:01 ` Jan Kara
[not found] ` <20120425090156.GB12568-+0h/O2h83AeN3ZZ/Hiejyg@public.gmane.org>
2012-04-25 12:05 ` Fengguang Wu
2012-04-15 11:37 ` [Lsf] " Peter Zijlstra
2012-04-17 22:01 ` Tejun Heo
2012-04-18 6:30 ` Jan Kara
2012-04-14 12:25 ` [Lsf] " Peter Zijlstra
2012-04-16 12:54 ` Vivek Goyal
2012-04-16 13:07 ` Fengguang Wu
2012-04-16 14:19 ` Fengguang Wu
2012-04-16 15:52 ` Vivek Goyal
[not found] ` <20120416155207.GB15437-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-17 2:14 ` Fengguang Wu
[not found] ` <20120403183655.GA23106-RcKxWJ4Cfj1J2suj2OqeGauc2jM2gXBXkQQo+JxHRPFibQn6LdNjmg@public.gmane.org>
2012-04-04 17:51 ` Fengguang Wu
2012-04-04 18:35 ` Vivek Goyal
[not found] ` <20120404183528.GJ12676-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-04 21:42 ` Fengguang Wu
2012-04-05 15:10 ` Vivek Goyal
2012-04-06 0:32 ` Fengguang Wu
2012-04-04 19:33 ` Tejun Heo
[not found] ` <20120404193355.GD29686-RcKxWJ4Cfj1J2suj2OqeGauc2jM2gXBXkQQo+JxHRPFibQn6LdNjmg@public.gmane.org>
2012-04-04 20:18 ` Vivek Goyal
2012-04-05 16:31 ` Tejun Heo
2012-04-05 17:09 ` Vivek Goyal
2012-04-06 9:59 ` Fengguang Wu
2012-04-17 22:38 ` Tejun Heo
[not found] ` <20120417223854.GG19975-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2012-04-19 14:23 ` Fengguang Wu
2012-04-19 18:31 ` Vivek Goyal
2012-04-20 12:45 ` Fengguang Wu
2012-04-20 19:29 ` Vivek Goyal
2012-04-20 21:33 ` Tejun Heo
2012-04-22 14:26 ` Fengguang Wu
2012-04-23 12:30 ` Vivek Goyal [this message]
2012-04-23 16:04 ` Tejun Heo
2012-04-19 20:26 ` Jan Kara
2012-04-20 13:34 ` Fengguang Wu
2012-04-20 19:08 ` Tejun Heo
[not found] ` <20120420190844.GH32324-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2012-04-22 14:46 ` Fengguang Wu
2012-04-23 16:56 ` Tejun Heo
2012-04-24 7:58 ` Fengguang Wu
2012-04-25 15:47 ` Tejun Heo
2012-04-23 9:14 ` Jan Kara
2012-04-23 10:24 ` Fengguang Wu
2012-04-23 12:42 ` Jan Kara
2012-04-23 14:31 ` Fengguang Wu
2012-04-18 6:57 ` Jan Kara
[not found] ` <20120418065720.GA21485-+0h/O2h83AeN3ZZ/Hiejyg@public.gmane.org>
2012-04-18 7:58 ` Fengguang Wu
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=20120423123011.GA8103@redhat.com \
--to=vgoyal@redhat.com \
--cc=andrea@betterlinux.com \
--cc=axboe@kernel.dk \
--cc=cgroups@vger.kernel.org \
--cc=containers@lists.linux-foundation.org \
--cc=ctalbott@google.com \
--cc=fengguang.wu@intel.com \
--cc=jack@suse.cz \
--cc=jmoyer@redhat.com \
--cc=kamezawa.hiroyu@jp.fujitsu.com \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=lizefan@huawei.com \
--cc=lsf@lists.linux-foundation.org \
--cc=rni@google.com \
--cc=sjayaraman@suse.com \
--cc=tj@kernel.org \
/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
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
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).