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=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,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 21253C41514 for ; Wed, 21 Aug 2019 18:38:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E88142339E for ; Wed, 21 Aug 2019 18:38:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=netronome-com.20150623.gappssmtp.com header.i=@netronome-com.20150623.gappssmtp.com header.b="E8ncTyp7" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727768AbfHUSiZ (ORCPT ); Wed, 21 Aug 2019 14:38:25 -0400 Received: from mail-qk1-f196.google.com ([209.85.222.196]:42505 "EHLO mail-qk1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726530AbfHUSiZ (ORCPT ); Wed, 21 Aug 2019 14:38:25 -0400 Received: by mail-qk1-f196.google.com with SMTP id 201so2725293qkm.9 for ; Wed, 21 Aug 2019 11:38:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=netronome-com.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:subject:message-id:in-reply-to:references :organization:mime-version:content-transfer-encoding; bh=XDlPfXRQuCPTCFskR9JG+Wsrqkken/Qm3lzMWM8DxQY=; b=E8ncTyp78G09Ml3oDEKWx4WWp1oBs8ewBRvCvHL71PZX4EiuhkfYo+NEOcEFerYYjg ME8120Myrk0zxGFkcd+JVQ/Zv40mVmjmwUisMqPWZFxnfikG+0PClD+V8VtjzQdtx9NY O82w76IPamf9t/sZioRnBxwDsDpkWF2D7wXjTaFQnhsJL5HQmfXwWH5RNBwL8Riu3B3o VeHOFbw3MNfmi6WdDb4tRtBmFl+ZUmOUvZrMEgB6paU/IzQAXIWndWVzhJm2dujx7dQ8 WCNhzmw1q6cYkCms3I2Ft77m+iZ+nz3SXbFpdv+7m8nZ8xtYHmBa+sJ/q2BktavB8CXH W/mg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:in-reply-to :references:organization:mime-version:content-transfer-encoding; bh=XDlPfXRQuCPTCFskR9JG+Wsrqkken/Qm3lzMWM8DxQY=; b=beOcSwkoLrNuoizJkyoo4HvvmBS+oUoHM3u3pI33YE5dq7oyOF/UitiVtXT4WIWe6/ H+F/4keN9APR65KbhqBUMZNW4x7iJIpKGwZhDbI0UJtAjjp26CfJsgyOQANrW9ITDD/0 m9tSWlmf0TtweaBY1CPQUZcFtvJlayoGsI5RltQLZBvChZrjD/uop2DFsBPElG/b+zFq PTXlw0DLWPJgy/BN2HIcxl6/zQMdO487dB3dqjib26PPUw7qE8btSolKi/uF6hNRXx4Y 9d2tnW1QN2r4mDRTjvKhm/zBNeu8aF+oBUGN8hYK9G9/DrZvsiYJQwXda4AQuRTLv3dx VaNQ== X-Gm-Message-State: APjAAAVagACENL6FH50ftHq2dCjVl55EeoGP/vhgWFfcNGapDuLv/gWk C6pHH82i9sGzWvsxcT/HKtU9kQ== X-Google-Smtp-Source: APXvYqxUMD6ESn0CCDKKuMpJDp9Of8FsLAwQpIVdxp6TANQKqRzeiAON5wzfi/oG1vODOtHolL7iaA== X-Received: by 2002:a37:2f05:: with SMTP id v5mr32971442qkh.143.1566412704245; Wed, 21 Aug 2019 11:38:24 -0700 (PDT) Received: from cakuba.netronome.com ([66.60.152.14]) by smtp.gmail.com with ESMTPSA id d22sm10068312qto.45.2019.08.21.11.38.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Aug 2019 11:38:24 -0700 (PDT) Date: Wed, 21 Aug 2019 11:38:16 -0700 From: Jakub Kicinski To: Toshiaki Makita Cc: Stanislav Fomichev , Alexei Starovoitov , Daniel Borkmann , Martin KaFai Lau , Song Liu , Yonghong Song , "David S. Miller" , Jesper Dangaard Brouer , John Fastabend , Jamal Hadi Salim , Cong Wang , Jiri Pirko , netdev@vger.kernel.org, bpf@vger.kernel.org, William Tu Subject: Re: [RFC PATCH bpf-next 00/14] xdp_flow: Flow offload to XDP Message-ID: <20190821113816.4dee030a@cakuba.netronome.com> In-Reply-To: <250f99fd-7289-a8e2-a710-560305e2d17d@gmail.com> References: <20190813120558.6151-1-toshiaki.makita1@gmail.com> <20190814170715.GJ2820@mini-arch> <14c4a876-6f5d-4750-cbe4-19622f64975b@gmail.com> <20190815152100.GN2820@mini-arch> <20190815122232.4b1fa01c@cakuba.netronome.com> <20190816115224.6aafd4ee@cakuba.netronome.com> <5e9bee13-a746-f148-00de-feb7cb7b1403@gmail.com> <20190819111546.35a8ed76@cakuba.netronome.com> <250f99fd-7289-a8e2-a710-560305e2d17d@gmail.com> Organization: Netronome Systems, Ltd. MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On Wed, 21 Aug 2019 17:49:33 +0900, Toshiaki Makita wrote: > > Having an implementation nor support a feature of another implementation > > and degrade gracefully to the slower one is not necessarily breakage. > > We need to make a concious decision here, hence the clarifying question. > > As I described above, breakage can happen in some case, and if the patch > breaks xdp_flow I think we need to fix xdp_flow at the same time. If > xdp_flow does not support newly added features but it works for existing > ones, it is OK. In the first place not all features can be offloaded to > xdp_flow. I think this is the same as HW-offload. I see, that sounds reasonable, yes. Thanks for clarifying.