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>
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index c8d047b..07ec574 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -3626,12 +3626,14 @@
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 @@
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;