netdev - Re: [RFC v3 4/7] workqueue: use new hashtable implementation

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Date:	Mon, 06 Aug 2012 18:19:11 -0700
From:	Joe Perches <joe@...ches.com>
To:	Sasha Levin <levinsasha928@...il.com>
Cc:	torvalds@...ux-foundation.org, tj@...nel.org,
	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, paul.gortmaker@...driver.com,
	davem@...emloft.net, rostedt@...dmis.org, mingo@...e.hu,
	ebiederm@...ssion.com, aarcange@...hat.com, ericvh@...il.com,
	netdev@...r.kernel.org, josh@...htriplett.org,
	eric.dumazet@...il.com, mathieu.desnoyers@...icios.com,
	Sasha Levin <sasha.levin@...cle.com>
Subject: Re: [RFC v3 4/7] workqueue: use new hashtable implementation

On Tue, 2012-08-07 at 02:45 +0200, Sasha Levin wrote:
> From: Sasha Levin <sasha.levin@...cle.com>
> 
> Switch workqueues to use the new hashtable implementation. This reduces the amount of
> generic unrelated code in the workqueues.

Just style trivia:

> diff --git a/kernel/workqueue.c b/kernel/workqueue.c
[]
> @@ -897,8 +839,15 @@ static struct worker *__find_worker_executing_work(struct global_cwq *gcwq,
>  static struct worker *find_worker_executing_work(struct global_cwq *gcwq,
>  						 struct work_struct *work)
>  {
> -	return __find_worker_executing_work(gcwq, busy_worker_head(gcwq, work),
> -					    work);
> +	struct worker *worker;
> +	struct hlist_node *tmp;
> +
> +	hash_for_each_possible(gcwq->busy_hash, worker, BUSY_WORKER_HASH_ORDER,
> +								tmp, hentry, work)
> +		if (worker->current_work == work)
> +			return worker;

braces please:

	hash_for_each_possible(gcwq->busy_hash, worker, BUSY_WORKER_HASH_ORDER,
			       tmp, hentry, work) {
		if (worker->current_work == work)
			return worker;
	}

[]

@@ -1916,7 +1865,7 @@ static void cwq_dec_nr_in_flight(struct cpu_workqueue_struct *cwq, int color,
>   * @worker: self
>   * @work: work to process
>   *
> - * Process @work.  This function contains all the logics necessary to
> + * Process @work.  This? function contains all the logics necessary to

Odd ? and the grammar also seems odd.

>   * process a single work including synchronization against and
>   * interaction with other workers on the same cpu, queueing and
>   * flushing.  As long as context requirement is met, any worker can


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