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=-0.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 49A5EC43215 for ; Mon, 2 Dec 2019 15:29:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1CB4A2073C for ; Mon, 2 Dec 2019 15:29:51 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="hRMlCTQX" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727467AbfLBP3u (ORCPT ); Mon, 2 Dec 2019 10:29:50 -0500 Received: from us-smtp-2.mimecast.com ([207.211.31.81]:28815 "EHLO us-smtp-delivery-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727435AbfLBP3t (ORCPT ); Mon, 2 Dec 2019 10:29:49 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1575300588; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=0z2tQm4iXkieh7Y2qc0PIyltREwM+PT4orb8BcP5pjQ=; b=hRMlCTQXnuVQ3Nnqz0nxWgZFK9SweGw58EVWmJp0B9Ze0KHggQ+/g7VWhT58x2w6j2YOcM +m2z50nzUJu1d/PKtX1SbHklTfXR4v/vqOhCQYLVBeQKrAdNAXwK/D++4VSWNw9MWKleK3 RdtDf0uTTh4vKrW20lOZVDlytqg2Nuo= Received: from mail-qt1-f198.google.com (mail-qt1-f198.google.com [209.85.160.198]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-283-eXPGVTJENJajwtUyyI8rTg-1; Mon, 02 Dec 2019 10:29:45 -0500 Received: by mail-qt1-f198.google.com with SMTP id u9so97229qte.5 for ; Mon, 02 Dec 2019 07:29:45 -0800 (PST) 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:references :mime-version:content-disposition:in-reply-to; bh=UHNVZK66LNTKTGCBCYSRNRG2nM4kaD92FRubfSh9yTo=; b=iI6MLn+iOnwiYUAblRu3BOfP2DSWP45LhHrP4/VldXV/qG02HTevT943ljS5OMfVyi yTIlNBjOzvlh9z5JAWfOJnVi3mpROoXyFsdDiyMUjVKhz6IN7c3Lwa1SPvNKoQb+ONrN AY0JP+McFMEN+Vo1cj6UIogof2Kn3fi/J7wv6ziCC2kVWLuDW/6CxHFip4y9kxDdn/HB WQU+xarBqcO+dBc12OaOye6ozRpBNduznNxN7YZsOG6sXh7HJldar0+h+vTC+4G6ZVPm A3QZ5TGbynKWGNTWUE+Nv3x4O9V8+WtDepOabMPDm5xdoUVRMn/MQdPa1csxw+dpW3Ka nHIg== X-Gm-Message-State: APjAAAWNh1Ks5veE7o0rHn1uIL5a5dRlqktH5pD7psPzNriFSBJBxovc Y43D/luArOBjk0d6rkNsij0ymr0FcN/w6dn98/OdlVLL8cUXUZMIdFtBgCYoSQJGfOm04U5kMta 3YatjYjT2HPBq9VSX X-Received: by 2002:a0c:f990:: with SMTP id t16mr16297119qvn.134.1575300584890; Mon, 02 Dec 2019 07:29:44 -0800 (PST) X-Google-Smtp-Source: APXvYqwiflZ/75vDGfgMJ5OKhk/kspL4JpVa3xIK//K0jByQmCbTNb/IuB45oI9Mm2q6ml+h0rnrOg== X-Received: by 2002:a0c:f990:: with SMTP id t16mr16297085qvn.134.1575300584679; Mon, 02 Dec 2019 07:29:44 -0800 (PST) Received: from redhat.com (bzq-79-181-48-215.red.bezeqint.net. [79.181.48.215]) by smtp.gmail.com with ESMTPSA id v7sm16794967qtk.89.2019.12.02.07.29.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Dec 2019 07:29:43 -0800 (PST) Date: Mon, 2 Dec 2019 10:29:38 -0500 From: "Michael S. Tsirkin" To: Jakub Kicinski Cc: Prashant Bhole , "David S . Miller" , Jason Wang , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Martin KaFai Lau , Song Liu , Yonghong Song , Andrii Nakryiko , netdev@vger.kernel.org, qemu-devel@nongnu.org, kvm@vger.kernel.org Subject: Re: [RFC net-next 00/18] virtio_net XDP offload Message-ID: <20191128024912-mutt-send-email-mst@kernel.org> References: <20191126100744.5083-1-prashantbhole.linux@gmail.com> <20191126123514.3bdf6d6f@cakuba.netronome.com> <20191127152653-mutt-send-email-mst@kernel.org> <20191127154014.2b91ecc2@cakuba.netronome.com> MIME-Version: 1.0 In-Reply-To: <20191127154014.2b91ecc2@cakuba.netronome.com> X-MC-Unique: eXPGVTJENJajwtUyyI8rTg-1 X-Mimecast-Spam-Score: 0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On Wed, Nov 27, 2019 at 03:40:14PM -0800, Jakub Kicinski wrote: > > For better or worse that's how userspace is written. >=20 > HW offload requires modifying the user space, too. The offload is not > transparent. Do you know that? It's true, offload of program itself isn't transparent. Adding a 3rd interface (software/hardware/host) isn't welcome though, IMHO. --=20 MST