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workqueue: use NUMA-aware allocation for pool_workqueues 

Use kmem_cache_alloc_node() with @pool->node instead of
kmem_cache_zalloc() when allocating a pool_workqueue so that it's
allocated on the same node as the associated worker_pool.  As there's
no no kmem_cache_zalloc_node(), move zeroing to init_pwq().

This was suggested by Lai Jiangshan.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Lai Jiangshan <laijs@cn.fujitsu.com>
This commit is contained in:
Tejun Heo 2013-04-01 11:23:35 -07:00
parent f147f29eb7
commit e50aba9aea
1 changed files with 4 additions and 2 deletions
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6
kernel/workqueue.c
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@ -3626,12 +3626,14 @@ static void pwq_adjust_max_active(struct pool_workqueue *pwq)
spin_unlock_irq(&pwq->pool->lock);
}
/* initialize newly zalloced @pwq which is associated with @wq and @pool */
/* initialize newly alloced @pwq which is associated with @wq and @pool */
static void init_pwq(struct pool_workqueue *pwq, struct workqueue_struct *wq,
struct worker_pool *pool)
{
BUG_ON((unsigned long)pwq & WORK_STRUCT_FLAG_MASK);
memset(pwq, 0, sizeof(*pwq));
pwq->pool = pool;
pwq->wq = wq;
pwq->flush_color = -1;
@ -3677,7 +3679,7 @@ static struct pool_workqueue *alloc_unbound_pwq(struct workqueue_struct *wq,
if (!pool)
return NULL;
pwq = kmem_cache_zalloc(pwq_cache, GFP_KERNEL);
pwq = kmem_cache_alloc_node(pwq_cache, GFP_KERNEL, pool->node);
if (!pwq) {
put_unbound_pool(pool);
return NULL;