<div dir="ltr"><div>Thanks applied!<br><br>PS: I will continue to review your other patches in the next few days.<br><br>Best regards,<div> Philipp</div></div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Tue, Jul 8, 2025 at 9:53 AM zhengbing.huang <<a href="mailto:zhengbing.huang@easystack.cn">zhengbing.huang@easystack.cn</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">During the sync process, we found that the<br>
IB_WC_RNR_RETRY_EXC_ERR error always occurred, and then<br>
the connection break. Then when the connection is restored,<br>
this error occurs again, enter a loop.<br>
<br>
When the IB_WC_RNR_RETRY_EXC_ERR error occurs,<br>
it indicates that there is no rx_desc at the receive side currently.<br>
Then we query that the current rnr_retry value is 0,<br>
meane there is no retry.<br>
<br>
So we modify rnr_retry to 7(max value), and the problem did not occur again.<br>
<br>
Signed-off-by: zhengbing.huang <<a href="mailto:zhengbing.huang@easystack.cn" target="_blank">zhengbing.huang@easystack.cn</a>><br>
---<br>
drbd/drbd_transport_rdma.c | 1 +<br>
1 file changed, 1 insertion(+)<br>
<br>
diff --git a/drbd/drbd_transport_rdma.c b/drbd/drbd_transport_rdma.c<br>
index 30edfaf96..14392a33b 100644<br>
--- a/drbd/drbd_transport_rdma.c<br>
+++ b/drbd/drbd_transport_rdma.c<br>
@@ -409,6 +409,7 @@ static struct rdma_conn_param dtr_conn_param = {<br>
.responder_resources = 1,<br>
.initiator_depth = 1,<br>
.retry_count = 10,<br>
+ .rnr_retry_count = 7,<br>
};<br>
<br>
static u32 dtr_cm_to_lkey(struct dtr_cm *cm)<br>
-- <br>
2.43.0<br>
<br>
</blockquote></div>