From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 15384C433E9 for ; Mon, 22 Feb 2021 07:09:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BB6E364EB4 for ; Mon, 22 Feb 2021 07:09:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229949AbhBVHJE (ORCPT ); Mon, 22 Feb 2021 02:09:04 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:60859 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229549AbhBVHJB (ORCPT ); Mon, 22 Feb 2021 02:09:01 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1613977655; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=VDuXO5zUJ4skk3u4UbGFqeIktbCo8MisQ81CqMl1/44=; b=IC5KDmwRTYwIa9m5ZOcBQ0EewowhH5bONJHM+XClrcYyn066EXvudYS+VhmoLs9Xw2XqJ9 cYPC7cZ1/TpuO6ROhxoDWIr7NgML2PDChhw6yoC/PHAoE3NPo5yjAo2h8DffTQu8GCOFW3 WixHl0PCa0YpWQHX0IzCxBvKSQxnMbk= Received: from mail-pl1-f200.google.com (mail-pl1-f200.google.com [209.85.214.200]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-459-tlvv7RGANIi__YvwpBIpsw-1; Mon, 22 Feb 2021 02:07:32 -0500 X-MC-Unique: tlvv7RGANIi__YvwpBIpsw-1 Received: by mail-pl1-f200.google.com with SMTP id k13so2578295plc.3 for ; Sun, 21 Feb 2021 23:07:31 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=VDuXO5zUJ4skk3u4UbGFqeIktbCo8MisQ81CqMl1/44=; b=ssME3f0sdVuwCjfIj3/HDWkstDRuygqkrZZ6TnEr+pHDZ4WysCr8ewTLpShMPD2CKo jnhYAbJKN+Wi2FE83jxgWwTL8Rbvy5TQdSW821P03UXkDeni1TwiwSxwK+CfUwOaCZMB pftPPOCg/V9k0nCJ+r5II3KE9KL8biOwOxG1udwr4IQg1pNI9HdrzsbY3KjTz0ohHdJ5 UbfZyEf1kM/uGzzOrars6bBwmoqjZCSWVQo5fldFN9FRSn3qcmOnmf1+0b08/gpgiFqG BAxaPCkmLptaqr88isQBMzO2AXSd8qYzp8hJu+9S7cB2nVkIyyyt8aWW4JQ8ziqC7Z5a eOjg== X-Gm-Message-State: AOAM531osrEWedAvc/J419QoWTxW05OxQinC4p2tcz/fSbBOzmkwZJX+ gfNKEA79mQa2GhR+ejoYV7TqZ8iAynkllKh8g8Ua3IZTNVDNSQOFn0E72A3KcIUH2KdA13YJm4y 00TZtgTxnhFqvdCSbIQvI2HnjqDzgufuz4wWW/ZqTV9MjQRuDflKRYhe0cucfhG4= X-Received: by 2002:a17:90a:cd06:: with SMTP id d6mr4867761pju.138.1613977650595; Sun, 21 Feb 2021 23:07:30 -0800 (PST) X-Google-Smtp-Source: ABdhPJz79OrKbRrtAfiD6Esm6oEGGKH8K+mEKBsf+u12b+o9o8Q4Qyg003s3d36qBlqAERFQrUMlJA== X-Received: by 2002:a17:90a:cd06:: with SMTP id d6mr4867739pju.138.1613977650377; Sun, 21 Feb 2021 23:07:30 -0800 (PST) Received: from localhost ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id g65sm16855068pfb.20.2021.02.21.23.07.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 21 Feb 2021 23:07:29 -0800 (PST) From: Coiby Xu To: netdev@vger.kernel.org Cc: kexec@lists.infradead.org, intel-wired-lan@lists.osuosl.org, Jesse Brandeburg , Tony Nguyen , "David S. Miller" , Jakub Kicinski , linux-kernel@vger.kernel.org (open list) Subject: [RFC PATCH 1/4] i40e: use minimal tx and rx pairs for kdump Date: Mon, 22 Feb 2021 15:06:58 +0800 Message-Id: <20210222070701.16416-2-coxu@redhat.com> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210222070701.16416-1-coxu@redhat.com> References: <20210222070701.16416-1-coxu@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org 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