linux-kernel - Re: [PATCH 06/10 V2] workqueue: convert worker_idr to worker

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Date:	Tue, 13 May 2014 14:43:06 +0800
From:	Lai Jiangshan <laijs@...fujitsu.com>
To:	Tejun Heo <tj@...nel.org>
CC:	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 06/10 V2] workqueue: convert worker_idr to worker_ida

On 05/13/2014 05:40 AM, Tejun Heo wrote:
> On Mon, May 12, 2014 at 02:56:18PM +0800, Lai Jiangshan wrote:
>> @@ -1681,7 +1682,6 @@ static void worker_detach_from_pool(struct worker *worker,
>>  	struct completion *detach_completion = NULL;
>>  
>>  	mutex_lock(&pool->manager_mutex);
>> -	idr_remove(&pool->worker_idr, worker->id);
>>  	list_del(&worker->node);
>>  	if (list_empty(&pool->workers))
>>  		detach_completion = pool->detach_completion;
> 
> Why are we moving ida removal to the caller here?  Does

ida							is for worker ID
pool->workers list and worker_detach_from_pool()	are for attaching/detaching

moving ida removal to the caller removes the unneeded coupling.

> worker_detach_from_pool() get used for something else later?  Up until
> this point, the distinction seems pretty arbitrary.
> 
>> @@ -1757,8 +1754,6 @@ static struct worker *create_worker(struct worker_pool *pool)
>>  	if (pool->flags & POOL_DISASSOCIATED)
>>  		worker->flags |= WORKER_UNBOUND;
>>  
>> -	/* successful, commit the pointer to idr */
>> -	idr_replace(&pool->worker_idr, worker, worker->id);
> 
> Ah, the comment is removed altogether.  Please disregard my previous
> review on the comment.
> 
> Thanks.
> 

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