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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 1DD9CC10DCE for ; Sun, 15 Mar 2020 04:04:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EF391206E9 for ; Sun, 15 Mar 2020 04:04:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726024AbgCOEEE (ORCPT ); Sun, 15 Mar 2020 00:04:04 -0400 Received: from shards.monkeyblade.net ([23.128.96.9]:35294 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725788AbgCOEED (ORCPT ); Sun, 15 Mar 2020 00:04:03 -0400 Received: from localhost (unknown [IPv6:2601:601:9f00:477::3d5]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) (Authenticated sender: davem-davemloft) by shards.monkeyblade.net (Postfix) with ESMTPSA id 1737A15B7531B; Sat, 14 Mar 2020 21:04:03 -0700 (PDT) Date: Sat, 14 Mar 2020 21:04:02 -0700 (PDT) Message-Id: <20200314.210402.573725635566592048.davem@davemloft.net> To: petrm@mellanox.com Cc: netdev@vger.kernel.org, kuba@kernel.org, mrv@mojatatu.com, jhs@mojatatu.com, xiyou.wangcong@gmail.com, jiri@mellanox.com, mlxsw@mellanox.com Subject: Re: [PATCH net-next v2 0/6] RED: Introduce an ECN tail-dropping mode From: David Miller In-Reply-To: <20200311173356.38181-1-petrm@mellanox.com> References: <20200311173356.38181-1-petrm@mellanox.com> X-Mailer: Mew version 6.8 on Emacs 26.1 Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Sat, 14 Mar 2020 21:04:03 -0700 (PDT) Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Petr Machata Date: Wed, 11 Mar 2020 19:33:50 +0200 > When the RED qdisc is currently configured to enable ECN, the RED algorithm > is used to decide whether a certain SKB should be marked. If that SKB is > not ECN-capable, it is early-dropped. > > It is also possible to keep all traffic in the queue, and just mark the > ECN-capable subset of it, as appropriate under the RED algorithm. Some > switches support this mode, and some installations make use of it. > There is currently no way to put the RED qdiscs to this mode. > > Therefore this patchset adds a new RED flag, TC_RED_TAILDROP. When the > qdisc is configured with this flag, non-ECT traffic is enqueued (and > tail-dropped when the queue size is exhausted) instead of being > early-dropped. ... Series applied, thank you.