linux-kernel - Re: [PATCH] workqueue: fix locking in retry path of maybe_create

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Message-ID: <20100712132347.GA19305@windriver.com>
Date:	Mon, 12 Jul 2010 21:23:47 +0800
From:	Yong Zhang <yong.zhang@...driver.com>
To:	Tejun Heo <tj@...nel.org>
Cc:	torvalds@...ux-foundation.org, mingo@...e.hu,
	linux-kernel@...r.kernel.org, jeff@...zik.org,
	akpm@...ux-foundation.org, rusty@...tcorp.com.au,
	cl@...ux-foundation.org, dhowells@...hat.com,
	arjan@...ux.intel.com, oleg@...hat.com, axboe@...nel.dk,
	fweisbec@...il.com, dwalker@...eaurora.org,
	stefanr@...6.in-berlin.de, florian@...kler.org,
	andi@...stfloor.org, mst@...hat.com, randy.dunlap@...cle.com
Subject: Re: [PATCH] workqueue: fix locking in retry path of
 maybe_create_worker()

On Mon, Jul 12, 2010 at 10:53:18AM +0200, Tejun Heo wrote:
> maybe_create_worker() mismanaged locking when worker creation fails
> and it has to retry.  Fix locking and simplify lock manipulation.
> 
> Signed-off-by: Tejun Heo <tj@...nel.org>
> Reported-by: Yong Zhang <yong.zhang@...driver.com>
> ---
> Heh, that was stupid.  Thanks a lot for spotting it.  I simplified
> things a bit there as there's no reason to repeatedly lock and unlock
> there.  Does this look good to you?

Yeah, this is better.

Thanks,
Yong
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