linux-kernel - Re: [PATCH 04/10] workqueue: destroy worker directly in the idle timeout handler

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Message-ID: <20140507134142.GF16702@htj.dyndns.org>
Date:	Wed, 7 May 2014 09:41:42 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Lai Jiangshan <laijs@...fujitsu.com>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 04/10] workqueue: destroy worker directly in the idle
 timeout handler

On Wed, May 07, 2014 at 09:38:39PM +0800, Lai Jiangshan wrote:
> On Wed, May 7, 2014 at 9:12 PM, Tejun Heo <tj@...nel.org> wrote:
> > Hello, Lai.
> >
> > On Wed, May 07, 2014 at 03:10:20PM +0800, Lai Jiangshan wrote:
> >> 1) complete() can't be called inside attach_mutex due to the worker
> >>    shouldn't access to the pool after complete().
> >
> > Sure, complete it after releasing the lock.  Shutdown can't complete
> > before the completion gets completed, right?
> >
> >> 2) put_unbound_pool() may called from get_unbound_pool(), we need to add
> >>    an additional check and avoid the wait_for_completion() if so.
> 
> Do you accept if I remove put_unbound_pool() from get_unbound_pool()
> and use several freeing code instead?

Hah?  How much extra complexity are we talking about?  It's a single
if, no?

-- 
tejun
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