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=-5.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 5AFF1C0018C for ; Sat, 19 Dec 2020 15:31:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 35ACB23A79 for ; Sat, 19 Dec 2020 15:31:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726763AbgLSPbl (ORCPT ); Sat, 19 Dec 2020 10:31:41 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35478 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726581AbgLSPbl (ORCPT ); Sat, 19 Dec 2020 10:31:41 -0500 Received: from mail-qk1-x729.google.com (mail-qk1-x729.google.com [IPv6:2607:f8b0:4864:20::729]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BB4C2C061282 for ; Sat, 19 Dec 2020 07:31:00 -0800 (PST) Received: by mail-qk1-x729.google.com with SMTP id f26so3379115qka.0 for ; Sat, 19 Dec 2020 07:31:00 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mojatatu-com.20150623.gappssmtp.com; s=20150623; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=Mnxj/ATKB1MlnwmVSmmqoIzxnVWNw1Scl7Hlo4abUiM=; b=D7dkAyOOc5bVta3x8wWCYTWw1buGNRmbtzcYzjYdJWXPolSNZDWMiMVKUfWmfBANIS oXrUNye9INjyClpMBL3xQA02Wja2ixQA8BIcdtAcOr/aNFAEnUPl/il9sWaHtk+v17d9 /oUO3Q0ki25SC6vP8lNzrPtcpT0CzQX/kUEq+FxjDhZnR2HeGocKAXsdHILkjxlCJFZw VjfbfhOIuJgCe3ac6fwX4hyh9iMUnAS6nePg3vqvV/iCFlIE7KL6fy49P+nVYQoxsKhs Q/DPMRfy0lIaoulhUwr+n2fKpJD6m8utYFo4GmppIOT1a+nuLuvL6wlsmLVdGlfw9CXl 9FxQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=Mnxj/ATKB1MlnwmVSmmqoIzxnVWNw1Scl7Hlo4abUiM=; b=K3MMfSHaBnFMoZrzcJIrRd9SvRIVCxyYIckUVEUua93uqr3TdsoCiU2VPiLV8C0TYu 8Hh17zkn6pLsgXwwXHPFHw9VrdroOuouGGVf1z5lz93f/kmgVrb+sRWFy6gnRVLriXoF jr29lzjp968MROHxoL80EEekQ/H/BIclNMl+5F94YU9xAKvkjoLEH57bjuD4xTMQT4GF 51Kn8Xmukr1iKjMTAlEnBfnkKMRLfp3ZqVFzPemkAccZ99bJHl6GxnoXrP9jw9N10f7D JEXIAq6Ei3b24KmxXhh84qC7lIwRGjEIq3xcZjf/fYtq8D/Rlb1jaxcgbV+FzUBGvvIU 2HUQ== X-Gm-Message-State: AOAM533MXrMkypVDO+CzFSZYNDSLSJHihNIYYKtKxoQ/oGiZun6/yU8a uO7Xecry/cuRXpY+QkMIvSfoMA== X-Google-Smtp-Source: ABdhPJwhOkMU+H59rE17l5pxJhljj5GBsKjG6MoQ59lAlOlhF0nAFXHlWYWPQeeaOFRFDK2I2Et4Bg== X-Received: by 2002:a37:a110:: with SMTP id k16mr10395520qke.320.1608391859778; Sat, 19 Dec 2020 07:30:59 -0800 (PST) Received: from [192.168.2.48] (bras-base-kntaon1617w-grc-10-184-147-165-106.dsl.bell.ca. [184.147.165.106]) by smtp.googlemail.com with ESMTPSA id m8sm418094qkh.21.2020.12.19.07.30.58 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 19 Dec 2020 07:30:58 -0800 (PST) Subject: Re: [PATCH v5 bpf-next 03/14] xdp: add xdp_shared_info data structure To: Shay Agroskin , Lorenzo Bianconi Cc: Saeed Mahameed , Lorenzo Bianconi , bpf@vger.kernel.org, netdev@vger.kernel.org, davem@davemloft.net, kuba@kernel.org, ast@kernel.org, daniel@iogearbox.net, sameehj@amazon.com, john.fastabend@gmail.com, dsahern@kernel.org, brouer@redhat.com, echaudro@redhat.com, jasowang@redhat.com References: <21d27f233e37b66c9ad4073dd09df5c2904112a4.1607349924.git.lorenzo@kernel.org> <5465830698257f18ae474877648f4a9fe2e1eefe.camel@kernel.org> <20201208110125.GC36228@lore-desk> From: Jamal Hadi Salim Message-ID: <1b0a5b59-f7e6-78b3-93bd-2ea35274e783@mojatatu.com> Date: Sat, 19 Dec 2020 10:30:57 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.4.3 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On 2020-12-19 9:53 a.m., Shay Agroskin wrote: > > Lorenzo Bianconi writes: > >> for the moment I do not know if this area is used for other purposes. >> Do you think there are other use-cases for it? Sorry to interject: Does it make sense to use it to store arbitrary metadata or a scratchpad in this space? Something equivalent to skb->cb which is lacking in XDP. cheers, jamal