In the function duplicate_request, the reference of skb can be increased
to replace the function skb_clone.
This will make rxe performace better and save 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_resp.c | 17 +++--------------
1 file changed, 3 insertions(+), 14 deletions(-)
diff --git a/drivers/infiniband/sw/rxe/rxe_resp.c b/drivers/infiniband/sw/rxe/rxe_resp.c
index d37bb9b..5b6916e 100644
--- a/drivers/infiniband/sw/rxe/rxe_resp.c
+++ b/drivers/infiniband/sw/rxe/rxe_resp.c
@@ -1133,24 +1133,13 @@ static enum resp_states duplicate_request(struct rxe_qp *qp,
/* Find the operation in our list of responder resources. */
res = find_resource(qp, pkt->psn);
if (res) {
- struct sk_buff *skb_copy;
-
- skb_copy = skb_clone(res->atomic.skb, GFP_ATOMIC);
- if (skb_copy) {
- rxe_add_ref(qp); /* for the new SKB */
- } else {
- pr_warn("Couldn't clone atomic resp\n");
- rc = RESPST_CLEANUP;
- goto out;
- }
-
+ refcount_inc(&res->atomic.skb->users);
/* Resend the result. */
rc = rxe_xmit_packet(to_rdev(qp->ibqp.device), qp,
- pkt, skb_copy);
+ pkt, res->atomic.skb);
if (rc) {
pr_err("Failed resending result. This flow is not handled - skb ignored\n");
- rxe_drop_ref(qp);
- kfree_skb(skb_copy);
+ kfree_skb(res->atomic.skb);
rc = RESPST_CLEANUP;
goto out;
}
--
2.7.4
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