netdev - [PATCH net] ibmvnic: Start completion queue negotiation at server-provided optimum values

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 7 Nov 2016 14:27:28 -0600
From:   John Allen <jallen@...ux.vnet.ibm.com>
To:     netdev@...r.kernel.org
Cc:     Thomas Falcon <tlfalcon@...ux.vnet.ibm.com>
Subject: [PATCH net] ibmvnic: Start completion queue negotiation at
 server-provided optimum values

Use the opt_* fields to determine the starting point for negotiating the
number of tx/rx completion queues with the vnic server. These contain the
number of queues that the vnic server estimates that it will be able to
allocate. While renegotiation may still occur, using the opt_* fields will
reduce the number of times this needs to happen and will prevent driver
probe timeout on systems using large numbers of ibmvnic client devices per
vnic port.

Signed-off-by: John Allen <jallen@...ux.vnet.ibm.com>
---
diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index d54405b4..ee66164 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -1493,9 +1493,8 @@ static void init_sub_crqs(struct ibmvnic_adapter *adapter, int retry)
 		    adapter->max_rx_add_entries_per_subcrq > entries_page ?
 		    entries_page : adapter->max_rx_add_entries_per_subcrq;

-		/* Choosing the maximum number of queues supported by firmware*/
-		adapter->req_tx_queues = adapter->max_tx_queues;
-		adapter->req_rx_queues = adapter->max_rx_queues;
+		adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues;
+		adapter->req_rx_queues = adapter->opt_rx_comp_queues;
 		adapter->req_rx_add_queues = adapter->max_rx_add_queues;

 		adapter->req_mtu = adapter->max_mtu;