linux-kernel - Re: [PATCH 15/19] workqueue: kill cpu_populated

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Date:	Fri, 20 Nov 2009 17:40:54 +0900
From:	Tejun Heo <tj@...nel.org>
To:	Tejun Heo <tj@...nel.org>
CC:	torvalds@...ux-foundation.org, awalls@...ix.net,
	linux-kernel@...r.kernel.org, jeff@...zik.org, mingo@...e.hu,
	akpm@...ux-foundation.org, jens.axboe@...cle.com,
	rusty@...tcorp.com.au, cl@...ux-foundation.org,
	dhowells@...hat.com, arjan@...ux.intel.com, avi@...hat.com,
	peterz@...radead.org, johannes@...solutions.net
Subject: Re: [PATCH 15/19] workqueue: kill cpu_populated_map

11/20/2009 01:46 PM, Tejun Heo wrote:
> Single threaded workqueue is scheduled to be reimplemented in the near
> future.  Kill cpu_populated_map and make single threaded workqueues
> behave more like multi threaded ones - all cwqs are initialized and
> all workqueues are linked on the workqueues list.  This will ease
> further changes.
> 
> While at it, make get_cwq() always return the cwq for the specified
> cpu, add target_cwq() for cases where single thread distinction is
> necessary and drop all direct usage of per_cpu_ptr() on wq->cpu_wq.

This one was incorrect in that it may leak a thread when offline is is
brought up for the first time.  I'll repost 15-19 along with more prep
patches.

Thanks.

-- 
tejun
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