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, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, 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 D8945C10F14 for ; Wed, 2 Oct 2019 22:54:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A683821848 for ; Wed, 2 Oct 2019 22:54:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Jr1ddmUW" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728220AbfJBWy3 (ORCPT ); Wed, 2 Oct 2019 18:54:29 -0400 Received: from mail-lf1-f65.google.com ([209.85.167.65]:35377 "EHLO mail-lf1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727103AbfJBWy3 (ORCPT ); Wed, 2 Oct 2019 18:54:29 -0400 Received: by mail-lf1-f65.google.com with SMTP id w6so313790lfl.2 for ; Wed, 02 Oct 2019 15:54:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=LuKn0yMGsula0qz5RapziKUyAoMNwVeNzzbmW1Cw7/w=; b=Jr1ddmUWeweEVtyYQSVxWNJRuyceX3XpL0WKxYYCi0OUo1xyCpNUxqN7Ty2XGlgQoc 3a9KUKVOPXV3edwTCEPUec9QYAXYgi+skMyfbZISDZ/qiAzl5PntzEHH73zgiTUWNKS7 DY4aVUe1WTbtrpPD7kOyTCI4pQbLZJmn0R3pi8tRQNdU+UtCQS21G8rmgwokbNFkxiFV jptKdu/3SPS/SGkpyIcaHR/8eEkJDaFM9FvAt2oWhWvp+9BkZO6UzwabTO9ab4FORc8G /mbEadRucnqlzb/1whMLTfmVAuIyI6kbKl0MEnbrwmi+6Fv3lmBmuYBeofyJ5A/bOXJd c5KQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=LuKn0yMGsula0qz5RapziKUyAoMNwVeNzzbmW1Cw7/w=; b=XoY5+oiOHKPDK3cns3X6oeoL6pQaPJ/5eIxjumj+66cVHTAHWF+JKfh5PRE2qcBMAH LuD8plqPNyHItmnnMbArs1tww0eHeAsKcKqq523CP2799tXilOx3HzxAXnZP5EjTre91 MlyiEjhSo4PqAzbZQnZ6pIz5GxSSrjv/vugPZBPa3jygiXrar6ODxAYRR42XZNyTb7rM pxxITzwpgfrfMJuqSnu1RAa1ccNxJsk9JMdkvFMjV4iQl83RWZ3iQbFCFOTowO24KZSi f9T6bz8xjb5fcMX/n23MLlHnxvx6xleUyEUnMt/einXMH0Re07PBEkIg9iH8Reg+aP5J AbzQ== X-Gm-Message-State: APjAAAXRv0J68qx60ZiNREyJn5E49GKJGKjblbZe5+y8K7Lwkk+94RLI q37iPkHJjWlZd6cTskYQKTkkW1hO6JLW2zyS/gk= X-Google-Smtp-Source: APXvYqz00cNLER3uqJWVH+gjQRFCnaBSoKbz1fJTRd9Idz6TjTCg5Cl+IPd0lZChPbbfWrM05HFg1E2vef7AP9xzJCc= X-Received: by 2002:ac2:515b:: with SMTP id q27mr3798328lfd.154.1570056866969; Wed, 02 Oct 2019 15:54:26 -0700 (PDT) MIME-Version: 1.0 References: <20191002221017.2085-1-wdauchy@gmail.com> <025bcf1e-b7d4-5fa2-ec68-074c62b9d63c@gmail.com> In-Reply-To: <025bcf1e-b7d4-5fa2-ec68-074c62b9d63c@gmail.com> From: William Dauchy Date: Thu, 3 Oct 2019 00:54:15 +0200 Message-ID: Subject: Re: [PATCH] tcp: add tsval and tsecr to TCP_INFO To: Eric Dumazet Cc: NETDEV , "David S. Miller" Content-Type: text/plain; charset="UTF-8" Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Hello Eric, On Thu, Oct 3, 2019 at 12:33 AM Eric Dumazet wrote: > On 10/2/19 3:10 PM, William Dauchy wrote: > Reporting the last recorded values is really not good, > a packet capture will give you all this information in a non > racy way. Thank you for your quick answer. In my use case I use it on a http server where I tag my requests with such informations coming from tcp, which later helps to diagnose some issues and create some useful metrics to give me a general signal. Does it still sound like an invalid use case? Best regards, -- William