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=-1.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, URIBL_BLOCKED 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 60EC9C169C4 for ; Fri, 8 Feb 2019 18:12:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2567D21B26 for ; Fri, 8 Feb 2019 18:12:11 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=candelatech.com header.i=@candelatech.com header.b="SemxB39A" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727661AbfBHSMK (ORCPT ); Fri, 8 Feb 2019 13:12:10 -0500 Received: from mail2.candelatech.com ([208.74.158.173]:52618 "EHLO mail2.candelatech.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727115AbfBHSMJ (ORCPT ); Fri, 8 Feb 2019 13:12:09 -0500 Received: from [192.168.100.195] (firewall.candelatech.com [50.251.239.81]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail2.candelatech.com (Postfix) with ESMTPSA id 6B0D440B5A0; Fri, 8 Feb 2019 10:12:07 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 mail2.candelatech.com 6B0D440B5A0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=candelatech.com; s=default; t=1549649527; bh=bOnRwc+aau9lj36AF7TrHc2rq5PgfrFOCmUeuqB1hws=; h=Subject:To:References:From:Date:In-Reply-To:From; b=SemxB39AhGnzd6FXvs+na/H0WH6vOYp7AHMTduBy0Cs1fhhCPfHJU9cJ5VBrzMCD3 m7sXhGggCL5DttYK71r75Syue0bi/wbw9XfnwiWj8+eWo+fsvmbuOKHs/jvHhDDp2/ SPY8XC6WIN/p+bOpuB3gb/MMf9ix0QGegOXGxx7w= Subject: Re: Waiting for vrf to become free on rmmod of bridge... To: David Ahern , netdev References: From: Ben Greear Organization: Candela Technologies Message-ID: <41dcc56f-9c01-450f-1be1-61bb31506f4d@candelatech.com> Date: Fri, 8 Feb 2019 10:12:07 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On 2/6/19 5:50 PM, David Ahern wrote: > On 2/6/19 3:20 PM, Ben Greear wrote: >> Hello, >> >> I just saw this warning on a system running a hacked 4.20.2+ kernel. >> Any known bugs >> of this nature in this (upstream) kernel?  The command that is blocked is: >> 'rmmod bridge llc' >> >> [17069.299135] unregister_netdevice: waiting for _vrf13 to become free. >> Usage count = 1 >> [17079.306438] unregister_netdevice: waiting for _vrf13 to become free. >> Usage count = 1 >> [17089.314656] unregister_netdevice: waiting for _vrf13 to become free. >> Usage count = 1 >> [17099.322870] unregister_netdevice: waiting for _vrf13 to become free. >> Usage count = 1 >> >> Thanks, >> Ben >> > > No known refcount issues with vrf. > > I use namespaces for testing which creates devices, adds routes, runs > traffic and deletes the device and namespace. That series in the tests > has been known to trigger refcount problems in the past. I'm not using namespaces in my test, but it is fairly convoluted. If I figure out how to reproduce the issue I'll let you know. Thanks, Ben -- Ben Greear Candela Technologies Inc http://www.candelatech.com