From: Vivek Goyal <vgoyal-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: axboe-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org,
ctalbott-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org,
rni-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org,
containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Fengguang Wu
<fengguang.wu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Subject: Re: [PATCH 18/21] blkcg: move blkio_group_conf->weight to cfq
Date: Sun, 1 Apr 2012 17:09:56 -0400 [thread overview]
Message-ID: <20120401210955.GE6116@redhat.com> (raw)
In-Reply-To: <1332975091-10950-19-git-send-email-tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
On Wed, Mar 28, 2012 at 03:51:28PM -0700, Tejun Heo wrote:
> blkio_group_conf->weight is owned by cfq and has no reason to be
> defined in blkcg core. Replace it with cfq_group->dev_weight and let
> conf setting functions directly set it. If dev_weight is zero, the
> cfqg doesn't have device specific weight configured.
>
> Also, rename BLKIO_WEIGHT_* constants to CFQ_WEIGHT_* and rename
> blkio_cgroup->weight to blkio_cgroup->cfq_weight. We eventually want
> per-policy storage in blkio_cgroup but just mark the ownership of the
> field for now.
Hi Tejun,
blkio_cgroup->weight can be thought of in a more generic manner and that
is sytem wide cgroup weight. And more than one policy should be allowed
to make use of it. That's a differnt thing that currently only CFQ makes
use of it.
For example, Fengguang posted RFC patches to try to make use of blkcg->weight
and differentiate between buffered write bandwidth.
https://lkml.org/lkml/2012/3/28/275
Thanks
Vivek
next prev parent reply other threads:[~2012-04-01 21:09 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-28 22:51 [PATCHSET] block: modularize blkcg config and stat file handling Tejun Heo
[not found] ` <1332975091-10950-1-git-send-email-tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2012-03-28 22:51 ` [PATCH 01/21] blkcg: remove unused @pol and @plid parameters Tejun Heo
2012-03-28 22:51 ` [PATCH 02/21] blkcg: BLKIO_STAT_CPU_SECTORS doesn't have subcounters Tejun Heo
2012-03-28 22:51 ` [PATCH 03/21] blkcg: introduce blkg_stat and blkg_rwstat Tejun Heo
2012-03-28 22:51 ` [PATCH 04/21] blkcg: restructure statistics printing Tejun Heo
2012-03-28 22:51 ` [PATCH 05/21] blkcg: drop blkiocg_file_write_u64() Tejun Heo
2012-03-28 22:51 ` [PATCH 06/21] blkcg: restructure configuration printing Tejun Heo
2012-03-28 22:51 ` [PATCH 07/21] blkcg: restructure blkio_group configruation setting Tejun Heo
2012-03-28 22:51 ` [PATCH 08/21] blkcg: blkg_conf_prep() Tejun Heo
[not found] ` <1332975091-10950-9-git-send-email-tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2012-03-28 22:53 ` Tejun Heo
2012-03-28 22:51 ` [PATCH 09/21] blkcg: export conf/stat helpers to prepare for reorganization Tejun Heo
2012-03-28 22:51 ` [PATCH 10/21] blkcg: implement blkio_policy_type->cftypes Tejun Heo
2012-03-28 22:51 ` [PATCH 11/21] blkcg: move conf/stat file handling code to policies Tejun Heo
2012-03-28 22:51 ` [PATCH 12/21] cfq: collapse cfq.h into cfq-iosched.c Tejun Heo
2012-03-28 22:51 ` [PATCH 13/21] blkcg: move statistics update code to policies Tejun Heo
2012-03-28 22:51 ` [PATCH 14/21] blkcg: cfq doesn't need per-cpu dispatch stats Tejun Heo
2012-03-28 22:51 ` [PATCH 15/21] blkcg: add blkio_policy_ops operations for exit and stat reset Tejun Heo
2012-03-28 22:51 ` [PATCH 16/21] blkcg: move blkio_group_stats to cfq-iosched.c Tejun Heo
2012-03-28 22:51 ` [PATCH 17/21] blkcg: move blkio_group_stats_cpu and friends to blk-throttle.c Tejun Heo
2012-03-28 22:51 ` [PATCH 18/21] blkcg: move blkio_group_conf->weight to cfq Tejun Heo
[not found] ` <1332975091-10950-19-git-send-email-tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2012-04-01 21:09 ` Vivek Goyal [this message]
[not found] ` <20120401210955.GE6116-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-01 21:22 ` Tejun Heo
2012-04-02 21:39 ` Tao Ma
[not found] ` <4F7A1C8B.3010402-d1IQDZat3X0@public.gmane.org>
2012-04-02 21:49 ` Tejun Heo
[not found] ` <20120402214938.GA19634-RcKxWJ4Cfj1J2suj2OqeGauc2jM2gXBXkQQo+JxHRPFibQn6LdNjmg@public.gmane.org>
2012-04-02 22:03 ` Tao Ma
[not found] ` <4F7A2217.2030201-d1IQDZat3X0@public.gmane.org>
2012-04-02 22:17 ` Tejun Heo
[not found] ` <20120402221702.GA21017-RcKxWJ4Cfj1J2suj2OqeGauc2jM2gXBXkQQo+JxHRPFibQn6LdNjmg@public.gmane.org>
2012-04-02 22:20 ` Tao Ma
[not found] ` <4F7A261A.9000200-d1IQDZat3X0@public.gmane.org>
2012-04-02 22:25 ` Vivek Goyal
[not found] ` <20120402222504.GA2672-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-02 22:28 ` Tejun Heo
2012-04-02 22:41 ` Tao Ma
[not found] ` <4F7A2B21.5000907-d1IQDZat3X0@public.gmane.org>
2012-04-03 15:37 ` IOPS based scheduler (Was: Re: [PATCH 18/21] blkcg: move blkio_group_conf->weight to cfq) Vivek Goyal
[not found] ` <20120403153736.GI5913-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-03 16:36 ` Tao Ma
[not found] ` <4F7B2708.6080504-d1IQDZat3X0@public.gmane.org>
2012-04-03 16:50 ` Vivek Goyal
[not found] ` <20120403164959.GJ5913-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-03 17:26 ` Tao Ma
[not found] ` <4F7B32AE.7050900-d1IQDZat3X0@public.gmane.org>
2012-04-04 12:35 ` Shaohua Li
[not found] ` <CANejiEU1qAsvogozY3MjZnpcrbYZO4CkRE8s73WGPc_R5LKV9g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-04-04 13:37 ` Vivek Goyal
[not found] ` <20120404133705.GB12676-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-04 14:52 ` Shaohua Li
[not found] ` <CANejiEVD6nFVqX8Jf_hmRHg8YyBvPxbTVjgEif3mO1aa925KkQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-04-04 15:10 ` Vivek Goyal
[not found] ` <20120404151014.GD12676-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-04 16:06 ` Tao Ma
2012-04-04 16:45 ` Tao Ma
[not found] ` <4F7C7A91.8040707-d1IQDZat3X0@public.gmane.org>
2012-04-04 16:50 ` Vivek Goyal
[not found] ` <20120404165048.GF12676-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-04 17:17 ` Vivek Goyal
2012-04-04 17:18 ` Tao Ma
[not found] ` <4F7C824D.2050308-d1IQDZat3X0@public.gmane.org>
2012-04-04 17:27 ` Vivek Goyal
2012-04-04 18:22 ` Vivek Goyal
[not found] ` <20120404182238.GI12676-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-04 18:36 ` Tao Ma
2012-04-04 13:31 ` Vivek Goyal
2012-03-28 22:51 ` [PATCH 19/21] blkcg: move blkio_group_conf->iops and ->bps to blk-throttle Tejun Heo
2012-03-28 22:51 ` [PATCH 20/21] blkcg: pass around pd->pdata instead of pd itself in prfill functions Tejun Heo
2012-03-28 22:51 ` [PATCH 21/21] blkcg: drop BLKCG_STAT_{PRIV|POL|OFF} macros Tejun Heo
2012-03-29 8:18 ` [PATCHSET] block: modularize blkcg config and stat file handling Jens Axboe
[not found] ` <4F741AED.6090901-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org>
2012-04-02 20:02 ` Tejun Heo
[not found] ` <20120402200233.GB17175-RcKxWJ4Cfj1J2suj2OqeGauc2jM2gXBXkQQo+JxHRPFibQn6LdNjmg@public.gmane.org>
2012-04-02 21:51 ` Jens Axboe
[not found] ` <4F7A1F52.50706-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org>
2012-04-02 22:33 ` Tejun Heo
2012-04-01 19:38 ` Vivek Goyal
2012-04-01 21:42 ` Tejun Heo
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