From: Tejun Heo <tj@kernel.org>
To: Lai Jiangshan <eag0628@gmail.com>
Cc: linux-kernel@vger.kernel.org, Lai Jiangshan <laijs@cn.fujitsu.com>
Subject: Re: [PATCHSET] workqueue: remove gcwq and make worker_pool the only backend abstraction
Date: Thu, 24 Jan 2013 10:51:03 -0800 [thread overview]
Message-ID: <20130124185103.GP2373@mtj.dyndns.org> (raw)
In-Reply-To: <510138E7.4060502@gmail.com>
Hey, Lai.
On Thu, Jan 24, 2013 at 09:36:39PM +0800, Lai Jiangshan wrote:
> For the whole patchset
> Reviewed-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Thanks for reviewing it.
> The only concern: get_work_pool() may slow down __queue_work().
Yeap, I'm currently working on to optimize idr so that the fast path
basically comes down to
if (id < FIRST_LAYER_LIMIT)
return idr->first_layer[id];
> I think we can save the pool->id at work_struct->entry.next, It will
> simply the code a little.
Hmm... I'm not sure whether saving id somewhere else would make any
noticeable difference. Decoding ->id probalby comes down to a couple
bit shuffling instructions.
> More aggressive, we can save the work_pool
> pointer at work_struct->entry.next, it will simply more code and
> __queue_work() will not be slowed down. (It is the user's
> responsibility not to modify work_struct if the user want to pass it
> to workqueue API later)
We probably can't store pointers to pools directly because custom
pools will need to be dynamically created and destroyed.
Thanks.
--
tejun
next prev parent reply other threads:[~2013-01-24 18:51 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-17 1:42 [PATCHSET] workqueue: remove gcwq and make worker_pool the only backend abstraction Tejun Heo
2013-01-17 1:42 ` [PATCH 01/17] workqueue: unexport work_cpu() Tejun Heo
2013-01-17 1:42 ` [PATCH 02/17] workqueue: use std_ prefix for the standard per-cpu pools Tejun Heo
2013-01-17 1:42 ` [PATCH 03/17] workqueue: make GCWQ_DISASSOCIATED a pool flag Tejun Heo
2013-01-17 1:42 ` [PATCH 04/17] workqueue: make GCWQ_FREEZING " Tejun Heo
2013-01-17 1:42 ` [PATCH 05/17] workqueue: introduce WORK_OFFQ_CPU_NONE Tejun Heo
2013-01-17 1:42 ` [PATCH 06/17] workqueue: add worker_pool->id Tejun Heo
2013-01-17 1:42 ` [PATCH 07/17] workqueue: record pool ID instead of CPU in work->data when off-queue Tejun Heo
2013-01-17 1:42 ` [PATCH 08/17] workqueue: move busy_hash from global_cwq to worker_pool Tejun Heo
2013-01-17 1:42 ` [PATCH 09/17] workqueue: move global_cwq->cpu " Tejun Heo
2013-01-17 1:42 ` [PATCH 10/17] workqueue: move global_cwq->lock " Tejun Heo
2013-01-17 1:42 ` [PATCH 11/17] workqueue: make hotplug processing per-pool Tejun Heo
2013-01-17 1:42 ` [PATCH 12/17] workqueue: make freezing/thawing per-pool Tejun Heo
2013-01-17 1:42 ` [PATCH 13/17] workqueue: replace for_each_worker_pool() with for_each_std_worker_pool() Tejun Heo
2013-01-17 1:42 ` [PATCH 14/17] workqueue: remove worker_pool->gcwq Tejun Heo
2013-01-17 1:42 ` [PATCH 15/17] workqueue: remove global_cwq Tejun Heo
2013-01-22 6:50 ` Joonsoo Kim
2013-01-23 1:09 ` Tejun Heo
2013-01-23 18:09 ` [PATCH v2 " Tejun Heo
2013-01-24 9:29 ` Joonsoo Kim
2013-01-24 18:44 ` Tejun Heo
2013-01-17 1:42 ` [PATCH 16/17] workqueue: rename nr_running variables Tejun Heo
2013-01-17 1:42 ` [PATCH 17/17] workqueue: post global_cwq removal cleanups Tejun Heo
2013-01-17 1:48 ` [PATCHSET] workqueue: remove gcwq and make worker_pool the only backend abstraction Tejun Heo
2013-01-17 3:25 ` Wanlong Gao
2013-01-17 19:11 ` Tejun Heo
2013-01-22 5:37 ` Joonsoo Kim
2013-01-23 1:07 ` Tejun Heo
2013-01-24 13:36 ` Lai Jiangshan
2013-01-24 18:51 ` Tejun Heo [this message]
2013-01-24 19:03 ` Tejun Heo
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=20130124185103.GP2373@mtj.dyndns.org \
--to=tj@kernel.org \
--cc=eag0628@gmail.com \
--cc=laijs@cn.fujitsu.com \
--cc=linux-kernel@vger.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