From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [PATCH v2 net] fq_codel: fix NET_XMIT_CN behavior Date: Tue, 07 Jun 2016 15:39:35 -0700 (PDT) Message-ID: <20160607.153935.952593668152189228.davem@davemloft.net> References: <1465062227.2968.7.camel@edumazet-glaptop3.roam.corp.google.com> <20160604190301.GA8857@strlen.de> <1465070113.2968.18.camel@edumazet-glaptop3.roam.corp.google.com> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: fw@strlen.de, netdev@vger.kernel.org, stasn77@gmail.com, xiyou.wangcong@gmail.com, jhs@mojatatu.com To: eric.dumazet@gmail.com Return-path: Received: from shards.monkeyblade.net ([149.20.54.216]:58637 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1422669AbcFGWjg (ORCPT ); Tue, 7 Jun 2016 18:39:36 -0400 In-Reply-To: <1465070113.2968.18.camel@edumazet-glaptop3.roam.corp.google.com> Sender: netdev-owner@vger.kernel.org List-ID: From: Eric Dumazet Date: Sat, 04 Jun 2016 12:55:13 -0700 > From: Eric Dumazet > > My prior attempt to fix the backlogs of parents failed. > > If we return NET_XMIT_CN, our parents wont increase their backlog, > so our qdisc_tree_reduce_backlog() should take this into account. > > v2: Florian Westphal pointed out that we could drop the packet, > so we need to save qdisc_pkt_len(skb) in a temp variable before > calling fq_codel_drop() > > Fixes: 9d18562a2278 ("fq_codel: add batch ability to fq_codel_drop()") > Fixes: 2ccccf5fb43f ("net_sched: update hierarchical backlog too") > Reported-by: Stas Nichiporovich > Signed-off-by: Eric Dumazet Applied.