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Commit 9daf9e67 authored by Tejun Heo's avatar Tejun Heo
Browse files

workqueue: add worker_pool->id 



Add worker_pool->id which is allocated from worker_pool_idr.  This
will be used to record the last associated worker_pool in work->data.

Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Reviewed-by: default avatarLai Jiangshan <laijs@cn.fujitsu.com>
parent 715b06b8

kernel/workqueue.c

+21 −0
Original line number Diff line number Diff line
@@ -124,6 +124,7 @@ enum { 


struct worker_pool {

	struct global_cwq	*gcwq;		/* I: the owning gcwq */

	int			id;		/* I: pool ID */

	unsigned int		flags;		/* X: flags */



	struct list_head	worklist;	/* L: list of pending works */
@@ -445,6 +446,10 @@ static atomic_t unbound_pool_nr_running[NR_STD_WORKER_POOLS] = { 
	[0 ... NR_STD_WORKER_POOLS - 1]	= ATOMIC_INIT(0),	/* always 0 */

};



/* idr of all pools */

static DEFINE_MUTEX(worker_pool_idr_mutex);

static DEFINE_IDR(worker_pool_idr);



static int worker_thread(void *__worker);

static unsigned int work_cpu(struct work_struct *work);
@@ -461,6 +466,19 @@ static struct global_cwq *get_gcwq(unsigned int cpu) 
		return &unbound_global_cwq;

}



/* allocate ID and assign it to @pool */

static int worker_pool_assign_id(struct worker_pool *pool)

{

	int ret;



	mutex_lock(&worker_pool_idr_mutex);

	idr_pre_get(&worker_pool_idr, GFP_KERNEL);

	ret = idr_get_new(&worker_pool_idr, pool, &pool->id);

	mutex_unlock(&worker_pool_idr_mutex);



	return ret;

}



static atomic_t *get_pool_nr_running(struct worker_pool *pool)

{

	int cpu = pool->gcwq->cpu;
@@ -3830,6 +3848,9 @@ static int __init init_workqueues(void) 


			mutex_init(&pool->assoc_mutex);

			ida_init(&pool->worker_ida);



			/* alloc pool ID */

			BUG_ON(worker_pool_assign_id(pool));

		}

	}