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=-4.1 required=3.0 tests=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=unavailable 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 6C0F8C28CC6 for ; Tue, 4 Jun 2019 20:32:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 45EFF208E3 for ; Tue, 4 Jun 2019 20:32:06 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="HRlw7T5H" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726729AbfFDUcD (ORCPT ); Tue, 4 Jun 2019 16:32:03 -0400 Received: from mail-pg1-f195.google.com ([209.85.215.195]:41607 "EHLO mail-pg1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726717AbfFDUcC (ORCPT ); Tue, 4 Jun 2019 16:32:02 -0400 Received: by mail-pg1-f195.google.com with SMTP id 83so4191270pgg.8; Tue, 04 Jun 2019 13:32:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:openpgp:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=zbEJVcqozWzcoFlbBXS+TBjzcZ1OHQOrJK+1Yv2WO0M=; b=HRlw7T5HrC1sd0EEVOlmxMYcEUW9P5KTISto8J7IBxGP2yzW843P+jIUL6NelNXstQ D8XvyAu7QYkVM2IoDDAyXp0sXS8xF/4nek3GpocF8G24lBfn+qkMCPRMzavEVNOXYxUS caDzOhvPXLTgk6tZ5FH5SExn8kXr6oRHichMbXB+1pXtfQAeOzS6hzAFhuj9GxP+9+u7 1MxY+6w7didSa+HdOpJgnxJyixl31HmTrorgBWGTOJn7mqweLkxAtOiQGsSWN27LxrQ6 /nep/j/MTr041ex5XXhL5vuRtS5auX0MrPKYLZLgV9nKexEMj1k4O+JnxZY9SKOhOJ10 lmSQ== 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:openpgp:message-id :date:user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=zbEJVcqozWzcoFlbBXS+TBjzcZ1OHQOrJK+1Yv2WO0M=; b=Q9HToEZbMPE+z6IK7xHp3ROZL6kFAXebrllzx25/lcQe/grjEtEBCpRH/UUOzhT2Hl 8thYKZmENmspg9YgqkGygQ+D6gD59E75yWBgIRpuEi3tMz3FN1z0zsEls3YO/in3K/eh l3eu3gRxYujvKsv4lHMdGdAFF+MZ4caPzTwGab8oGYouv9jQsJiVdceysOqW6geJDsnP R4ai5S+y3S57jHXM4ELs/CE74jIt3HlNEivQHDUXE7Q2khcNx5xSdbR3tBetn5zY98ui lT6ucpCyOaMCa01JCoW3Su4OixTJ6y9WawbuYuJEUqF6EbLPX4nI05KzAVE4fuUjtbJI 8gyA== X-Gm-Message-State: APjAAAXM3Nnb04i+hNJRdxImGrFoxPZEn+seBrSUC0DGeauxezLRwd5n bvOvYTwAYZgstcM9yU6nUVhbD8Tz X-Google-Smtp-Source: APXvYqxbc/5j0N2mBryM3d+Q+6XQAi6sKwhl0NsA7+dyfcwjUGgCtsj58EypLAOnavta0iGS1MPgqA== X-Received: by 2002:a63:e616:: with SMTP id g22mr562455pgh.61.1559680321272; Tue, 04 Jun 2019 13:32:01 -0700 (PDT) Received: from [192.168.1.3] (ip68-101-123-102.oc.oc.cox.net. [68.101.123.102]) by smtp.gmail.com with ESMTPSA id c16sm1004134pfp.91.2019.06.04.13.31.59 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 04 Jun 2019 13:32:00 -0700 (PDT) Subject: Re: [PATCH v3 net-next 01/17] net: dsa: Keep a pointer to the skb clone for TX timestamping To: Vladimir Oltean , vivien.didelot@gmail.com, andrew@lunn.ch, davem@davemloft.net, richardcochran@gmail.com, john.stultz@linaro.org, tglx@linutronix.de, sboyd@kernel.org Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org References: <20190604170756.14338-1-olteanv@gmail.com> <20190604170756.14338-2-olteanv@gmail.com> From: Florian Fainelli Openpgp: preference=signencrypt Message-ID: Date: Tue, 4 Jun 2019 13:31:59 -0700 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.7.0 MIME-Version: 1.0 In-Reply-To: <20190604170756.14338-2-olteanv@gmail.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On 6/4/2019 10:07 AM, Vladimir Oltean wrote: > For drivers that use deferred_xmit for PTP frames (such as sja1105), > there is no need to perform matching between PTP frames and their egress > timestamps, since the sending process can be serialized. > > In that case, it makes sense to have the pointer to the skb clone that > DSA made directly in the skb->cb. It will be used for pushing the egress > timestamp back in the application socket's error queue. > > Signed-off-by: Vladimir Oltean Reviewed-by: Florian Fainelli -- Florian