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=unavailable 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 3F59AC43381 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 E960D64E04 for ; Mon, 22 Feb 2021 07:09:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229991AbhBVHJF (ORCPT ); Mon, 22 Feb 2021 02:09:05 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:34091 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229908AbhBVHJC (ORCPT ); Mon, 22 Feb 2021 02:09:02 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1613977656; 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=Qe0ZZtDgIHcmf3X92JOaLc0RMrpGrvEvnU3y42faHYj5geppSqxJ1JnTq3fOoeLKZ368Cz jAWgR/vNwmLMRqdPui0+mrATGdg5bPClDeHQVb7GYxr8REbLGqLNV3VNuWN9l8N8IgEVPZ v05aAelkdhWy+RSHQZRMq3r/LuxwJAo= Received: from mail-pg1-f197.google.com (mail-pg1-f197.google.com [209.85.215.197]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-31-M8VFg8ZbMhOztS6OKo-ITA-1; Mon, 22 Feb 2021 02:07:31 -0500 X-MC-Unique: M8VFg8ZbMhOztS6OKo-ITA-1 Received: by mail-pg1-f197.google.com with SMTP id m5so7602670pgu.21 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=fTWnzOD/S0iX6RY4ZSEwUnAC5vup+oR7If7LBWEzYJdSNnTKsu1P35aRKwpxc/JBo7 RlltGqPQQIPJX2O2Uf8V++DhL1NEFoe/QxxeRbtM6Jpp3GS7SXqpkrCiCSP3lhxGlzm3 RCw4n1K6lNBxUnrnPNA+0ejnBYeKZvx1v9gE6BzepYalfOzgf/35Vhjk5Op/HBDmgse5 JFzwpeYemxvzQ7aWhrph3Y/S+BIy7tOdBjQG2+De7NdifAZw5s3djaTF6v+nyUvRzd83 tm94P/+1+xxYBot1vrt3ETDMhGQAXiKSKjjbv+JOtfcIbuBpg2HR7CrrCuNlHWi38BEm jmVA== X-Gm-Message-State: AOAM530eksOAyblxqraUwS2JBhAWxbxpXj1bnisSXO2AOSgIGP+YEO0u odCQPH7ot1xlIXhgtY7X4loiJUdkvrOT/p1C9ZK4wOLTl36HkWsSRwfjd+7xN9KZIUIpy10yrm3 Q45TtkkW1Voaxuwx9TDT6OjUQ X-Received: by 2002:a17:90a:cd06:: with SMTP id d6mr4867752pju.138.1613977650543; 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: linux-kernel@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