netdev - Re: [RFC net-next (v2) 12/14] ixgbe: set maximal number of default RSS queues

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Date:	Mon, 25 Jun 2012 20:53:38 +0300
From:	"Eilon Greenstein" <eilong@...adcom.com>
To:	"Alexander Duyck" <alexander.h.duyck@...el.com>
cc:	"Yuval Mintz" <yuvalmin@...adcom.com>, davem@...emloft.net,
	netdev@...r.kernel.org,
	"Jeff Kirsher" <jeffrey.t.kirsher@...el.com>,
	"John Fastabend" <john.r.fastabend@...el.com>
Subject: Re: [RFC net-next (v2) 12/14] ixgbe: set maximal number of
 default RSS queues

On Mon, 2012-06-25 at 08:44 -0700, Alexander Duyck wrote:
> This doesn't limit queues, only interrupt vectors.  As I told you before
> you should look at the ixgbe_set_rss_queues function if you actually
> want to limit the number of RSS queues.

How about this:
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_lib.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_lib.c
index af1a531..23a8609 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_lib.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_lib.c
@@ -277,6 +277,8 @@ static inline bool ixgbe_set_rss_queues(struct ixgbe_adapter *adapter)
 	bool ret = false;
 	struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_RSS];
 
+	f->indices = min_t(int, netif_get_num_default_rss_queues(), f->indices);
+
 	if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
 		f->mask = 0xF;
 		adapter->num_rx_queues = f->indices;
@@ -302,7 +304,9 @@ static inline bool ixgbe_set_fdir_queues(struct ixgbe_adapter *adapter)
 	bool ret = false;
 	struct ixgbe_ring_feature *f_fdir = &adapter->ring_feature[RING_F_FDIR];
 
-	f_fdir->indices = min_t(int, num_online_cpus(), f_fdir->indices);
+	f_fdir->indices = min_t(int, netif_get_num_default_rss_queues(),
+				f_fdir->indices);
+
 	f_fdir->mask = 0;
 
 	/*
@@ -339,8 +343,7 @@ static inline bool ixgbe_set_fcoe_queues(struct ixgbe_adapter *adapter)
 	if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
 		return false;
 
-	f->indices = min_t(int, num_online_cpus(), f->indices);
-
+	f->indices = min_t(int, f->indices, netif_get_num_default_rss_queues());
 	adapter->num_rx_queues = 1;
 	adapter->num_tx_queues = 1;
 



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