rds: use list structure to track information for zerocopy completion notification
Commit 401910db4cd4 ("rds: deliver zerocopy completion notification
with data") removes support fo r zerocopy completion notification
on the sk_error_queue, thus we no longer need to track the cookie
information in sk_buff structures.
This commit removes the struct sk_buff_head rs_zcookie_queue by
a simpler list that results in a smaller memory footprint as well
as more efficient memory_allocation time.
Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/rds/af_rds.c b/net/rds/af_rds.c
index f712610..ab751a1 100644
--- a/net/rds/af_rds.c
+++ b/net/rds/af_rds.c
@@ -77,7 +77,7 @@ static int rds_release(struct socket *sock)
rds_send_drop_to(rs, NULL);
rds_rdma_drop_keys(rs);
rds_notify_queue_get(rs, NULL);
- __skb_queue_purge(&rs->rs_zcookie_queue);
+ rds_notify_msg_zcopy_purge(&rs->rs_zcookie_queue);
spin_lock_bh(&rds_sock_lock);
list_del_init(&rs->rs_item);
@@ -180,7 +180,7 @@ static __poll_t rds_poll(struct file *file, struct socket *sock,
}
if (!list_empty(&rs->rs_recv_queue) ||
!list_empty(&rs->rs_notify_queue) ||
- !skb_queue_empty(&rs->rs_zcookie_queue))
+ !list_empty(&rs->rs_zcookie_queue.zcookie_head))
mask |= (EPOLLIN | EPOLLRDNORM);
if (rs->rs_snd_bytes < rds_sk_sndbuf(rs))
mask |= (EPOLLOUT | EPOLLWRNORM);
@@ -515,7 +515,7 @@ static int __rds_create(struct socket *sock, struct sock *sk, int protocol)
INIT_LIST_HEAD(&rs->rs_recv_queue);
INIT_LIST_HEAD(&rs->rs_notify_queue);
INIT_LIST_HEAD(&rs->rs_cong_list);
- skb_queue_head_init(&rs->rs_zcookie_queue);
+ rds_message_zcopy_queue_init(&rs->rs_zcookie_queue);
spin_lock_init(&rs->rs_rdma_lock);
rs->rs_rdma_keys = RB_ROOT;
rs->rs_rx_traces = 0;