From mboxrd@z Thu Jan 1 00:00:00 1970 From: Coiby Xu Date: Mon, 22 Feb 2021 15:06:58 +0800 Subject: [Intel-wired-lan] [RFC PATCH 1/4] i40e: use minimal tx and rx pairs for kdump In-Reply-To: <20210222070701.16416-1-coxu@redhat.com> References: <20210222070701.16416-1-coxu@redhat.com> Message-ID: <20210222070701.16416-2-coxu@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: intel-wired-lan@osuosl.org List-ID: Set the number of the MSI-X vectors to 1. When MSI-X is enabled, it's not allowed to use more TC queue pairs than MSI-X vectors (pf->num_lan_msix) exist. Thus the number of tx and rx pairs (vsi->num_queue_pairs) will be equal to the number of MSI-X vectors, i.e., 1. Signed-off-by: Coiby Xu --- drivers/net/ethernet/intel/i40e/i40e_main.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c index 1db482d310c2..069c86e2f69d 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -6,6 +6,7 @@ #include #include #include +#include /* Local includes */ #include "i40e.h" @@ -15000,6 +15001,14 @@ static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent) if (err) goto err_switch_setup; + /* Reduce tx and rx pairs for kdump + * When MSI-X is enabled, it's not allowed to use more TC queue + * pairs than MSI-X vectors (pf->num_lan_msix) exist. Thus + * vsi->num_queue_pairs will be equal to pf->num_lan_msix, i.e., 1. + */ + if (is_kdump_kernel()) + pf->num_lan_msix = 1; + pf->udp_tunnel_nic.set_port = i40e_udp_tunnel_set_port; pf->udp_tunnel_nic.unset_port = i40e_udp_tunnel_unset_port; pf->udp_tunnel_nic.flags = UDP_TUNNEL_NIC_INFO_MAY_SLEEP; -- 2.30.0