drbd: Improve asender performance
Shorten receive path in the asender thread. Reduces CPU utilisation
of asender when receiving packets, and with that increases IOPs.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/drivers/block/drbd/drbd_worker.c b/drivers/block/drbd/drbd_worker.c
index 3b74f08..3ed2d87 100644
--- a/drivers/block/drbd/drbd_worker.c
+++ b/drivers/block/drbd/drbd_worker.c
@@ -1994,22 +1994,13 @@
return !list_empty(work_list);
}
-static bool dequeue_work_item(struct drbd_work_queue *queue, struct list_head *work_list)
-{
- spin_lock_irq(&queue->q_lock);
- if (!list_empty(&queue->q))
- list_move(queue->q.next, work_list);
- spin_unlock_irq(&queue->q_lock);
- return !list_empty(work_list);
-}
-
static void wait_for_work(struct drbd_connection *connection, struct list_head *work_list)
{
DEFINE_WAIT(wait);
struct net_conf *nc;
int uncork, cork;
- dequeue_work_item(&connection->sender_work, work_list);
+ dequeue_work_batch(&connection->sender_work, work_list);
if (!list_empty(work_list))
return;