From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Ahern Subject: [PATCH net-next v2 1/8] rtnetlink: Do not generate notifications for MTU events Date: Tue, 11 Apr 2017 17:02:40 -0700 Message-ID: <1491955367-12443-2-git-send-email-dsa@cumulusnetworks.com> References: <1491955367-12443-1-git-send-email-dsa@cumulusnetworks.com> Cc: David Ahern To: netdev@vger.kernel.org Return-path: Received: from mail-pf0-f179.google.com ([209.85.192.179]:34413 "EHLO mail-pf0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752603AbdDLACx (ORCPT ); Tue, 11 Apr 2017 20:02:53 -0400 Received: by mail-pf0-f179.google.com with SMTP id c198so5460358pfc.1 for ; Tue, 11 Apr 2017 17:02:53 -0700 (PDT) In-Reply-To: <1491955367-12443-1-git-send-email-dsa@cumulusnetworks.com> Sender: netdev-owner@vger.kernel.org List-ID: Changing MTU on a link currently causes 3 messages to be sent to userspace: [LINK]11: dummy1: mtu 1490 qdisc noqueue state UNKNOWN group default link/ether f2:52:5c:6d:21:f3 brd ff:ff:ff:ff:ff:ff [LINK]11: dummy1: mtu 1500 qdisc noqueue state UNKNOWN group default link/ether f2:52:5c:6d:21:f3 brd ff:ff:ff:ff:ff:ff [LINK]11: dummy1: mtu 1500 qdisc noqueue state UNKNOWN group default link/ether f2:52:5c:6d:21:f3 brd ff:ff:ff:ff:ff:ff Remove the messages sent for PRE_CHANGE_MTU and CHANGE_MTU netdev events. Signed-off-by: David Ahern --- net/core/rtnetlink.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index 58419da7961b..79ab43796b08 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -4117,7 +4117,6 @@ static int rtnetlink_event(struct notifier_block *this, unsigned long event, voi switch (event) { case NETDEV_REBOOT: - case NETDEV_CHANGEMTU: case NETDEV_CHANGEADDR: case NETDEV_CHANGENAME: case NETDEV_FEAT_CHANGE: @@ -4126,7 +4125,6 @@ static int rtnetlink_event(struct notifier_block *this, unsigned long event, voi case NETDEV_NOTIFY_PEERS: case NETDEV_CHANGEUPPER: case NETDEV_RESEND_IGMP: - case NETDEV_PRECHANGEMTU: case NETDEV_CHANGEINFODATA: case NETDEV_PRECHANGEUPPER: case NETDEV_CHANGELOWERSTATE: -- 2.1.4