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=-5.8 required=3.0 tests=BAYES_00,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 5F1EBC43381 for ; Mon, 1 Mar 2021 16:25:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 17A3A64F65 for ; Mon, 1 Mar 2021 16:25:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232555AbhCAQZO (ORCPT ); Mon, 1 Mar 2021 11:25:14 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:20299 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237562AbhCAQWU (ORCPT ); Mon, 1 Mar 2021 11:22:20 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1614615653; 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: in-reply-to:in-reply-to:references:references; bh=YM3yCG6aMG+Odvwo3hKtOettGzC4VJAxt6PYEdka1JQ=; b=XX3Uh1Da+XWyOWlUBou0+nbLybxatJyblLe0YSWemwGm4qsjXr23OYBR2iQ02d0JtWA2A/ zJBq2vLO0zrVkQnw1+L2lNQBsLVpfU4e25PkasXQi+Xt8t7rpGc3eUDbzj3Ev31TLjA1+D jOs468NrPW2+ehUSeOk2Kyo0QZhJEAQ= Received: from mail-ej1-f69.google.com (mail-ej1-f69.google.com [209.85.218.69]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-374-MAr_yMTwPCq3Ffkpk3B__A-1; Mon, 01 Mar 2021 11:20:43 -0500 X-MC-Unique: MAr_yMTwPCq3Ffkpk3B__A-1 Received: by mail-ej1-f69.google.com with SMTP id 11so316285ejz.20 for ; Mon, 01 Mar 2021 08:20:43 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:in-reply-to:references:date :message-id:mime-version; bh=YM3yCG6aMG+Odvwo3hKtOettGzC4VJAxt6PYEdka1JQ=; b=nqdtuO0RIkZfCqev0hrr0+g9iYdL0lB8oN5iB69S5VwtOgJR+TL7wVH6jRRHIuFHm6 AQF2PlniFdzmL5jrIjIZSVM1JGZRhiwie1kuu93mie3pMe8DjJK+cZ7KwDxyqHnobeOE dJ3BbiuIEvb/eFJvgCoWVGs1/vppAR5ErXNRGPGiHdTOa77pWCraSKfN9EMGBVozhUCB WUsiHDCSFC57VW8KmGSvR9svopzxtq20uQHVslJ9lEKCEgKXDc4e/cuhTycgLseXaaMb cFDeWM/iwdOeHMXVYvVqWWQbQlNkGFdxXaNdOrl2H34iNWeOLsfIsRmQWfBCCHUtRVE3 iBRg== X-Gm-Message-State: AOAM533KHpavNp6raC6H2rxHpxXHMa/EGoAvPNdhmeM5R5w9HZM6rra2 c8Oue6vdhYrnZN3KhV6QiRnxTUV+hHKIPojGjet1dpx8bnlzlFqiQJuML3kXZROy4pF8dIBtQin O7UbDFBR4Yb+9OxNevd/v/SU= X-Received: by 2002:a50:fd90:: with SMTP id o16mr17066581edt.292.1614615642268; Mon, 01 Mar 2021 08:20:42 -0800 (PST) X-Google-Smtp-Source: ABdhPJwavAh+0Rvhv9AAVRTL7eicIaGmxpHDUtZ4TN++zTH7/IzdEoPCJpooVL+U7x58qaBRtaBCkg== X-Received: by 2002:a50:fd90:: with SMTP id o16mr17066555edt.292.1614615641935; Mon, 01 Mar 2021 08:20:41 -0800 (PST) Received: from alrua-x1.borgediget.toke.dk ([2a0c:4d80:42:443::2]) by smtp.gmail.com with ESMTPSA id q18sm12514058eji.100.2021.03.01.08.20.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 01 Mar 2021 08:20:41 -0800 (PST) Received: by alrua-x1.borgediget.toke.dk (Postfix, from userid 1000) id D6D8C1800F1; Mon, 1 Mar 2021 17:20:40 +0100 (CET) From: Toke =?utf-8?Q?H=C3=B8iland-J=C3=B8rgensen?= To: Radu Stoenescu , Simon Horman Cc: Maciej Fijalkowski , Jesper Dangaard Brouer , Jason Wang , "xdp-newbies@vger.kernel.org" Subject: Re: Redirect from NIC to TAP In-Reply-To: References: <20210209102118.476f507d@carbon> <20210209094137.GA14290@ranger.igk.intel.com> <20210218101239.GA7062@netronome.com> X-Clacks-Overhead: GNU Terry Pratchett Date: Mon, 01 Mar 2021 17:20:40 +0100 Message-ID: <87eegyx2uf.fsf@toke.dk> MIME-Version: 1.0 Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: xdp-newbies@vger.kernel.org Radu Stoenescu writes: > Thanks a lot for the info. > > In retrospect, was there a way I could reach this conclusion myself > (no driver support)? I'm asking this since I'm relatively new to the > environment and we run various NICs from various vendors, and I would > like to know how to perform the "due diligence" myself before reaching > out? Grepping the source code is one. The xdp_monitor tool from samples/bpf might have provided a hint as well, but only that something was wrong, not the cause. This is a long-standing issue, and there's been some discussion around it, but let's just say that no consensus has emerged yet :/ -Toke