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=-6.6 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS 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 EAE8EC388F2 for ; Sun, 8 Nov 2020 05:27:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8F3A420897 for ; Sun, 8 Nov 2020 05:27:45 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="rO4JvHvj" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726062AbgKHF1o (ORCPT ); Sun, 8 Nov 2020 00:27:44 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39336 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726030AbgKHF1o (ORCPT ); Sun, 8 Nov 2020 00:27:44 -0500 Received: from mail-ot1-x341.google.com (mail-ot1-x341.google.com [IPv6:2607:f8b0:4864:20::341]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 349EFC0613CF; Sat, 7 Nov 2020 21:27:44 -0800 (PST) Received: by mail-ot1-x341.google.com with SMTP id n15so5444710otl.8; Sat, 07 Nov 2020 21:27:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=XE6DDqq8PzLKVEch12IMRl0UYe/3AExuvFUQzYKpLi4=; b=rO4JvHvjG1z98sfUyqjZnyyyW5v5uJhtLYJfPk/bepN2kdth/pRGCI2nHbZ+QvaLJV oYpVF6cSr5arJfh2Ejl06cewlNXviRHzycqte/VKaQo+3cVAVxRo/Pl9a1i9khDqswiB LF1uZVom/COgjeOL+cPLTsFpRdmmCEnnEv4/DsqE7nmB1R4mCUAQhEMNJlF/bq1O1EXK KtbtnCjn3CzZAf+zRa1KtZ4tSKhdqFiYc/0WBwY4iDdVkCpdJFYTLvPYyT5M5rl5+Knp T8x9O4MAbwTBiePfAZUsxn0Wk+DmbeGLtlza2rbqcUzCJrvRv3g1Gqh1/qnItPpjn25D Iv/A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=XE6DDqq8PzLKVEch12IMRl0UYe/3AExuvFUQzYKpLi4=; b=nh45UXaUVU1XxjPQ9HeBgcFzy4wdYxCbOv55szvbQNt3Z4IG0ycABEdZrJZDKcRmoX f63ZEO1dIebtoVZbB9nZDl1BT9wJttTER9HKhii4NT+8zqp3d67yKleyFWY0mln1xRJL GL0g52QXha821bAewnOHow/d8P5NrjhCY6XQ9qitJRVqmA8MSy/6ryBPR31Kn3ZA5KTk fsHvprv7PYql6fu48FA+gBAss1IVxulbICI+l9vWUKVnyqFYxt8sDZd4KavwjshW6utL GTeOUWMo38cusHIbayZHUkVsMPjHq6Pvh2H/fbbE9hPW9PbSQ2zuYuY/4ycDOgb4M0pj hnCg== X-Gm-Message-State: AOAM5329rGdiQNu4NbFDMX7jqyceyQJxbdrq1/2g0IMt03on2XElgv8x C0N4HqB9+F0tWUg53pYMGMnZdrWw7+m6ylV8/ts= X-Google-Smtp-Source: ABdhPJztcNOzPPZtWecyVrFoVBcPQ7OBV38hbvs50i68GTku5OjdMCjgbOWyXcEI90sNyXbqMqRLTOzj/YQk+20XeIY= X-Received: by 2002:a9d:731a:: with SMTP id e26mr6034762otk.53.1604813263494; Sat, 07 Nov 2020 21:27:43 -0800 (PST) MIME-Version: 1.0 References: <20201107122617.55d0909c@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com> <222b9c1b-9d60-22f3-6097-8abd651cc192@gmail.com> In-Reply-To: <222b9c1b-9d60-22f3-6097-8abd651cc192@gmail.com> From: Zhu Yanjun Date: Sun, 8 Nov 2020 13:27:32 +0800 Message-ID: Subject: Re: [PATCH 1/1] RDMA/rxe: Fetch skb packets from ethernet layer To: "zyjzyj2000@gmail.com" , kuba@kernel.org, Doug Ledford , Jason Gunthorpe , linux-rdma@vger.kernel.org, netdev Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org On Sun, Nov 8, 2020 at 1:24 PM Zhu Yanjun wrote: > > > > > -------- Forwarded Message -------- > Subject: Re: [PATCH 1/1] RDMA/rxe: Fetch skb packets from ethernet layer > Date: Sat, 7 Nov 2020 12:26:17 -0800 > From: Jakub Kicinski > To: Zhu Yanjun > CC: dledford@redhat.com, jgg@ziepe.ca, linux-rdma@vger.kernel.org, netdev@vger.kernel.org > > > On Thu, 5 Nov 2020 19:12:01 +0800 Zhu Yanjun wrote: > > In the original design, in rx, skb packet would pass ethernet > layer and IP layer, eventually reach udp tunnel. > > Now rxe fetches the skb packets from the ethernet layer directly. > So this bypasses the IP and UDP layer. As such, the skb packets > are sent to the upper protocals directly from the ethernet layer. > > This increases bandwidth and decreases latency. > > Signed-off-by: Zhu Yanjun > > > Nope, no stealing UDP packets with some random rx handlers. Why? Is there any risks? Zhu Yanjun > > The tunnel socket is a correct approach.