From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750846AbcCHSg1 (ORCPT ); Tue, 8 Mar 2016 13:36:27 -0500 Received: from mail-yw0-f173.google.com ([209.85.161.173]:34633 "EHLO mail-yw0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750747AbcCHSgS (ORCPT ); Tue, 8 Mar 2016 13:36:18 -0500 MIME-Version: 1.0 In-Reply-To: References: Date: Tue, 8 Mar 2016 10:36:17 -0800 Message-ID: Subject: Re: [PATCH net-next v2 3/3] ipv6: per netns FIB garbage collection From: Cong Wang To: Michal Kubecek Cc: "David S. Miller" , Linux Kernel Network Developers , LKML , Alexey Kuznetsov , James Morris , Hideaki YOSHIFUJI , Patrick McHardy , Hannes Frederic Sowa , Martin KaFai Lau Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Mar 8, 2016 at 5:44 AM, Michal Kubecek wrote: > One of our customers observed issues with FIB6 garbage collectors > running in different network namespaces blocking each other, resulting > in soft lockups (fib6_run_gc() initiated from timer runs always in > forced mode). > > Now that FIB6 walkers are separated per namespace, there is no more need > for instances of fib6_run_gc() in different namespaces blocking each > other. There is still a call to icmp6_dst_gc() which operates on shared > data but this function is protected by its own shared lock. > > Signed-off-by: Michal Kubecek Reviewed-by: Cong Wang