Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752748AbdLSUDG (ORCPT ); Tue, 19 Dec 2017 15:03:06 -0500 Received: from vie01a-dmta-ch02-2.mx.upcmail.net ([84.116.36.95]:61905 "EHLO vie01a-dmta-ch02-2.mx.upcmail.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752546AbdLSUDD (ORCPT ); Tue, 19 Dec 2017 15:03:03 -0500 X-SourceIP: 2001:470:25:65c::2 X-Authenticated-Sender: odi.ch@hispeed.ch Subject: Re: dst refcount is -1 To: Wei Wang Cc: "linux-kernel@vger.kernel.org" , Linux Kernel Network Developers References: From: =?UTF-8?Q?Ortwin_Gl=c3=bcck?= Message-ID: <305d3a86-7dc7-d131-dc1f-a7086fc1e2b3@odi.ch> Date: Tue, 19 Dec 2017 21:02:52 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.5.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 613 Lines: 14 On 12/19/2017 07:09 PM, Wei Wang wrote: > Would you give more details under what circumstances it happened? Circumstances are unknown as I can't correlate that log line to anything else. If I have to guess, then it has to do with ipsec events. These tunnel tend to go up and down a lot and there is steady traffic on most of them. > What kind of traffic is running? IPv4? IPv6? Or Both? Do you use xfrm? The machine has 10 IPv4 interfaces (via usb) and runs about 30 ipsec VPNs with total maybe 200 tunnels (xfrm). No real IPv6 traffic, just the usual link-local stuff that you see on any network. Ortwin