In mcast recv process, the function skb_clone is used. In fact,
the refcount can be increased to replace cloning a new skb since
the original skb will not be modified before it is freed.
This can make the performance better and save the memory.
CC: Srinivas Eeda <srinivas.eeda@xxxxxxxxxx>
CC: Junxiao Bi <junxiao.bi@xxxxxxxxxx>
Signed-off-by: Zhu Yanjun <yanjun.zhu@xxxxxxxxxx>
---
drivers/infiniband/sw/rxe/rxe_recv.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/infiniband/sw/rxe/rxe_recv.c b/drivers/infiniband/sw/rxe/rxe_recv.c
index 4c3f899..5b8f293 100644
--- a/drivers/infiniband/sw/rxe/rxe_recv.c
+++ b/drivers/infiniband/sw/rxe/rxe_recv.c
@@ -309,10 +309,13 @@ static void rxe_rcv_mcast_pkt(struct rxe_dev *rxe, struct sk_buff *skb)
continue;
/* if *not* the last qp in the list
- * make a copy of the skb to post to the next qp
+ * make a reference of the skb to post to the next qp
*/
- skb_copy = (mce->qp_list.next != &mcg->qp_list) ?
- skb_clone(skb, GFP_ATOMIC) : NULL;
+ skb_copy = NULL;
+ if (mce->qp_list.next != &mcg->qp_list) {
+ skb_copy = skb;
+ refcount_inc(&skb->users);
+ }
pkt->qp = qp;
rxe_add_ref(qp);
--
2.7.4
--
To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
