linux-kernel - Re: [PATCH 4/7] workqueue: single pass rebind

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Message-ID: <20120827190431.GB13094@dhcp-172-17-108-109.mtv.corp.google.com>
Date:	Mon, 27 Aug 2012 12:04:31 -0700
From:	Tejun Heo <tj@...nel.org>
To:	Lai Jiangshan <laijs@...fujitsu.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/7] workqueue: single pass rebind_workers

Hello, Lai.

On Tue, Aug 28, 2012 at 01:58:24AM +0800, Lai Jiangshan wrote:
> busy_worker_rebind_fn() can't return until all idle workers are rebound,
> the code of busy_worker_rebind_fn() ensure this.
> 
> So we can change the order of the code of rebind_workers(),
> and make it a single pass do the rebind_workers().
> 
> It makes the code much clean and better readability.

I can't see how this could be correct.  What prevents busy worker from
grabbing manager_mutex before idle one?

Thanks.

-- 
tejun
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