From patchwork Wed Nov 25 16:57:13 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Karlsson X-Patchwork-Id: 1406157 Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=paneda.se Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4Ch6Wm3mRCz9sSn for ; Thu, 26 Nov 2020 03:57:40 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731946AbgKYQ5W (ORCPT ); Wed, 25 Nov 2020 11:57:22 -0500 Received: from spam.lhost.no ([5.158.192.85]:41687 "EHLO mx04.lhost.no" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730062AbgKYQ5W (ORCPT ); Wed, 25 Nov 2020 11:57:22 -0500 X-ASG-Debug-ID: 1606323434-0ffc060722f1b960001-BZBGGp Received: from s103.paneda.no ([5.158.193.76]) by mx04.lhost.no with ESMTP id QT2HyX3uPiy22kK1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NO); Wed, 25 Nov 2020 17:57:17 +0100 (CET) X-Barracuda-Envelope-From: thomas.karlsson@paneda.se X-Barracuda-Effective-Source-IP: UNKNOWN[5.158.193.76] X-Barracuda-Apparent-Source-IP: 5.158.193.76 X-ASG-Whitelist: Client Received: from [192.168.10.188] (83.140.179.234) by s103.paneda.no (10.16.55.12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.1979.3; Wed, 25 Nov 2020 17:57:14 +0100 Subject: [PATCH] macvlan: Support for high multicast packet rate From: Thomas Karlsson X-ASG-Orig-Subj: [PATCH] macvlan: Support for high multicast packet rate To: Jakub Kicinski CC: "davem@davemloft.net" , "netdev@vger.kernel.org" , References: <485531aec7e243659ee4e3bb7fa2186d@paneda.se> <147b704ac1d5426fbaa8617289dad648@paneda.se> <20201123143052.1176407d@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com> Message-ID: <385b9b4c-25f5-b507-4e69-419883fa8043@paneda.se> Date: Wed, 25 Nov 2020 17:57:13 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.5.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-Originating-IP: [83.140.179.234] X-ClientProxiedBy: s103.paneda.no (10.16.55.12) To s103.paneda.no (10.16.55.12) X-Barracuda-Connect: UNKNOWN[5.158.193.76] X-Barracuda-Start-Time: 1606323437 X-Barracuda-Encrypted: ECDHE-RSA-AES256-SHA384 X-Barracuda-URL: https://mx04.lhost.no:443/cgi-mod/mark.cgi X-Virus-Scanned: by bsmtpd at lhost.no X-Barracuda-Scan-Msg-Size: 2038 X-Barracuda-BRTS-Status: 1 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Background: Broadcast and multicast packages are enqueued for later processing. This queue was previously hardcoded to 1000 packages. This proved insufficient for handling very high packet rates. This resulted in packet drops for multicast. While at the same time unicast worked fine. The change: This patch make the queue len adjustable to accommodate for environments with very high multicast packet rate. But still keeps the default value of 1000 unless specified. The queue len is specified using the bc_queue_len module parameter. Signed-off-by: Thomas Karlsson diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c index c8d803d3616c..5c92ef2db284 100644 --- a/drivers/net/macvlan.c +++ b/drivers/net/macvlan.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include #include @@ -35,11 +36,15 @@ #define MACVLAN_HASH_BITS 8 #define MACVLAN_HASH_SIZE (1<src = src; spin_lock(&port->bc_queue.lock); - if (skb_queue_len(&port->bc_queue) < MACVLAN_BC_QUEUE_LEN) { + if (skb_queue_len(&port->bc_queue) < bc_queue_len) { if (src) dev_hold(src->dev); __skb_queue_tail(&port->bc_queue, nskb);