ixgbe: Do not allocate too many netdev txqueues

Instead of allocating 128 struct netdev_queue per device, use the
minimum value between 128 and the number of possible txq's, to
reduce ram usage and "tc -s -d class shod dev .." output.

This patch fixes Eric Dumazet's patch to set the TX queues to
the correct minimum.

Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index 4a01022..a961da2 100644 (file)
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -5996,6 +5996,7 @@ static int __devinit ixgbe_probe(struct pci_dev *pdev,
        const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
        static int cards_found;
        int i, err, pci_using_dac;
+       unsigned int indices = num_possible_cpus();
 #ifdef IXGBE_FCOE
        u16 device_caps;
 #endif
@@ -6034,7 +6035,18 @@ static int __devinit ixgbe_probe(struct pci_dev *pdev,
        pci_set_master(pdev);
        pci_save_state(pdev);
 
-       netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), MAX_TX_QUEUES);
+       if (ii->mac == ixgbe_mac_82598EB)
+               indices = min_t(unsigned int, indices, IXGBE_MAX_RSS_INDICES);
+       else
+               indices = min_t(unsigned int, indices, IXGBE_MAX_FDIR_INDICES);
+
+       indices = max_t(unsigned int, indices, IXGBE_MAX_DCB_INDICES);
+#ifdef IXGBE_FCOE
+       indices += min_t(unsigned int, num_possible_cpus(),
+                        IXGBE_MAX_FCOE_INDICES);
+#endif
+       indices = min_t(unsigned int, indices, MAX_TX_QUEUES);
+       netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), indices);
        if (!netdev) {
                err = -ENOMEM;
                goto err_alloc_etherdev;