From: Tejun Heo <tj@kernel.org>
To: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH 00/10] workqueue: restructure flush_workqueue() and start all flusher at the same time
Date: Wed, 26 Sep 2012 10:04:39 -0700 [thread overview]
Message-ID: <20120926170439.GS16296@google.com> (raw)
In-Reply-To: <20120926164958.GR16296@google.com>
Hello, again.
On Wed, Sep 26, 2012 at 09:49:58AM -0700, Tejun Heo wrote:
> > The simple version of flush_workqueue() which I sent yesterday is "chained",
> > because it forces overflow flushers wait for free color and forces only one
> > flusher for one color.
> >
> > Since "not chaining" is important/essential. I sent a new draft implement today.
> > it uses multiple queues, one for each color(like SRCU).
> > this version is also simple, it remove 90 LOC.
>
> I'll review your patch but the current implementation is enough on
> that regard. I was trying to advise against going for two-color
> scheme.
So, I like it. Two things.
* I think we still want to optimize noop case. IOW, please keep the
early exit path for cases where there's no work item to flush.
* Can you please redo the patch series so that it doesn't go too much
roundabout?
Thanks.
--
tejun
prev parent reply other threads:[~2012-09-26 17:04 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-24 10:07 [PATCH 00/10] workqueue: restructure flush_workqueue() and start all flusher at the same time Lai Jiangshan
2012-09-24 10:07 ` [PATCH 01/10] workqueue: always pass flush responsibility to next Lai Jiangshan
2012-09-24 10:07 ` [PATCH 02/10] workqueue: remove unneeded check Lai Jiangshan
2012-09-24 10:07 ` [PATCH 03/10] workqueue: remove while(true) Lai Jiangshan
2012-09-24 10:07 ` [PATCH 04/10] workqueue: use nr_cwqs_to_flush array Lai Jiangshan
2012-09-24 10:07 ` [PATCH 05/10] workqueue: add wq_dec_flusher_ref() Lai Jiangshan
2012-09-24 10:07 ` [PATCH 06/10] workqueue: start all flusher at the same time Lai Jiangshan
2012-09-24 10:07 ` [PATCH 07/10] workqueue: simplify flush_workqueue_prep_cwqs() Lai Jiangshan
2012-09-24 10:07 ` [PATCH 08/10] workqueue: assign overflowed flushers's flush color when queued Lai Jiangshan
2012-09-24 10:07 ` [PATCH 09/10] workqueue: remove flusher_overflow Lai Jiangshan
2012-09-24 10:07 ` [PATCH 10/10] workqueue: remove wq->flush_color Lai Jiangshan
2012-09-24 20:39 ` [PATCH 00/10] workqueue: restructure flush_workqueue() and start all flusher at the same time Tejun Heo
2012-09-25 9:02 ` Lai Jiangshan
2012-09-25 20:14 ` Tejun Heo
2012-09-25 9:02 ` Lai Jiangshan
2012-09-25 20:24 ` Tejun Heo
2012-09-26 4:48 ` Lai Jiangshan
2012-09-26 16:49 ` Tejun Heo
2012-09-26 17:04 ` Tejun Heo [this message]
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=20120926170439.GS16296@google.com \
--to=tj@kernel.org \
--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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.