From 742c60e1285ca40642e988f7e3db92232171b27d Mon Sep 17 00:00:00 2001 From: Nick Child Date: Mon, 7 Nov 2022 14:32:15 -0600 Subject: ibmveth: Reduce default tx queues to 8 Previously, the default number of transmit queues was 16. Due to resource concerns, set to 8 queues instead. Still allow the user to set more queues (max 16) if they like. Since the driver is virtualized away from the physical NIC, the purpose of multiple queues is purely to allow for parallel calls to the hypervisor. Therefore, there is no noticeable effect on performance by reducing queue count to 8. Fixes: d926793c1de9 ("ibmveth: Implement multi queue on xmit") Reported-by: Dave Taht Signed-off-by: Nick Child Link: https://lore.kernel.org/r/20221107203215.58206-1-nnac123@linux.ibm.com Signed-off-by: Jakub Kicinski --- drivers/net/ethernet/ibm/ibmveth.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/net/ethernet/ibm/ibmveth.c') diff --git a/drivers/net/ethernet/ibm/ibmveth.c b/drivers/net/ethernet/ibm/ibmveth.c index 3b14dc93f59d..5b96cd94dcd2 100644 --- a/drivers/net/ethernet/ibm/ibmveth.c +++ b/drivers/net/ethernet/ibm/ibmveth.c @@ -1757,7 +1757,8 @@ static int ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id) kobject_uevent(kobj, KOBJ_ADD); } - rc = netif_set_real_num_tx_queues(netdev, ibmveth_real_max_tx_queues()); + rc = netif_set_real_num_tx_queues(netdev, min(num_online_cpus(), + IBMVETH_DEFAULT_QUEUES)); if (rc) { netdev_dbg(netdev, "failed to set number of tx queues rc=%d\n", rc); -- cgit v1.2.3