From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]) by casper.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lHeA9-005Ekh-GL for kexec@lists.infradead.org; Thu, 04 Mar 2021 02:56:30 +0000 Received: by mail-pj1-f71.google.com with SMTP id x5so1516298pjh.3 for ; Wed, 03 Mar 2021 18:56:16 -0800 (PST) From: Coiby Xu Subject: [PATCH v1 1/3] i40e: use minimal tx and rx pairs for kdump Date: Thu, 4 Mar 2021 10:55:41 +0800 Message-Id: <20210304025543.334912-2-coxu@redhat.com> In-Reply-To: <20210304025543.334912-1-coxu@redhat.com> References: <20210304025543.334912-1-coxu@redhat.com> MIME-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "kexec" Errors-To: kexec-bounces+dwmw2=infradead.org@lists.infradead.org To: netdev@vger.kernel.org Cc: kexec@lists.infradead.org, intel-wired-lan@lists.osuosl.org, Jakub Kicinski , Jesse Brandeburg , Tony Nguyen , "David S. Miller" , open list 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 353deae139f9..77bf8c392750 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" @@ -15485,6 +15486,14 @@ 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; -- 2.30.1 _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec