From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hannes Frederic Sowa Subject: Re: [PATCH/RFC] ipv6: fib: Drop cached routes with dead neighbours on fib GC Date: Fri, 11 Jan 2013 14:40:58 +0100 Message-ID: <20130111134058.GB8436@order.stressinduktion.org> References: <1357753459-12872-1-git-send-email-roland@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Cc: "David S. Miller" , netdev@vger.kernel.org, Roland Dreier To: Roland Dreier Return-path: Received: from order.stressinduktion.org ([87.106.68.36]:49366 "EHLO order.stressinduktion.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755202Ab3AKNk7 (ORCPT ); Fri, 11 Jan 2013 08:40:59 -0500 Content-Disposition: inline In-Reply-To: <1357753459-12872-1-git-send-email-roland@kernel.org> Sender: netdev-owner@vger.kernel.org List-ID: On Wed, Jan 09, 2013 at 09:44:19AM -0800, Roland Dreier wrote: > From: Roland Dreier > > This patch is as much bug report as it is a proposal to merge this > specific patch. The problem is definitely real; we hit it in a > situation where we have two systems connected back-to-back with two > bonded links between them, one system reboots, and the other system > gets NETDEV_CHANGEADDR. This patch definitely fixes that case for us, > but I'm not sure it's the right place to fix this, or if it covers all > the cases where this could happen. Anyway... Great analysis, thanks! There is bug report which indicates a fix to this problem could also solve some other corner cases regarding neighbour discovery: https://bugzilla.kernel.org/show_bug.cgi?id=42991 I will try to reproduce it at the weekend.