linux-kernel - Re: [PATCH 0/8] workqueue: advance concurrency management

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Message-ID: <CACvQF509UnU5RLtoxhnwmfdkudAR+_oWDKLfpq28WeKcUst5qw@mail.gmail.com>
Date:	Fri, 19 Apr 2013 06:10:57 +0800
From:	Lai Jiangshan <eag0628@...il.com>
To:	Tejun Heo <tj@...nel.org>, LKML <linux-kernel@...r.kernel.org>
Cc:	Lai Jiangshan <laijs@...fujitsu.com>
Subject: Re: [PATCH 0/8] workqueue: advance concurrency management

Ping.

On Mon, Apr 15, 2013 at 12:41 AM, Lai Jiangshan <laijs@...fujitsu.com> wrote:
> I found the early-increasing nr_running in wq_worker_waking_up() is useless
> in many cases. it tries to avoid waking up idle workers for pending work item.
> but delay increasing nr_running does not increase waking up idle workers.
>
> so we delay increasing and remove wq_worker_waking_up() and ...
>
> enjoy a simpler concurrency management.
>
> Lai Jiangshan (8):
>   workqueue: remove @cpu from wq_worker_sleeping()
>   workqueue: use create_and_start_worker() in manage_workers()
>   workqueue: remove cpu_intensive from process_one_work()
>   workqueue: quit cm mode when sleeping
>   workqueue: remove disabled wq_worker_waking_up()
>   workqueue: make nr_running non-atomic
>   workqueue: move worker->flags up
>   workqueue: rename ->nr_running to ->nr_cm_workers
>
>  kernel/sched/core.c         |    6 +-
>  kernel/workqueue.c          |  234 +++++++++++++++---------------------------
>  kernel/workqueue_internal.h |    9 +-
>  3 files changed, 89 insertions(+), 160 deletions(-)
>
> --
> 1.7.7.6
>
> --
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