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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E37DCC433EF for ; Mon, 7 Mar 2022 14:05:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239578AbiCGOGe (ORCPT ); Mon, 7 Mar 2022 09:06:34 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38178 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242994AbiCGOG3 (ORCPT ); Mon, 7 Mar 2022 09:06:29 -0500 Received: from mail-pg1-x536.google.com (mail-pg1-x536.google.com [IPv6:2607:f8b0:4864:20::536]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F0EA95F8F6 for ; Mon, 7 Mar 2022 06:05:34 -0800 (PST) Received: by mail-pg1-x536.google.com with SMTP id bc27so13651838pgb.4 for ; Mon, 07 Mar 2022 06:05:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=4COgZnp0miuQF4F2mz/bBye/0CIbPiSVj/Wj8NOJ+4A=; b=KO5U68g3iVYeqBQICrPu6zd5MT9aNbPREK3mMMBtglmkKx9v0YPXwb0mnrZ0E8OE0+ t8kNGwXGQBEF0kGSLU/nmZNSqj++igvsGVxc+rW34/D+6v1Zsmsy88P9fY7FxGHiU4r2 T5jAIiCyF7Z0sd2M/7Y85eGto3bhPvcSCxHVkKzPZxbPZN87b9UE7tpea+VR1WOgQJdL 58ZGyJ+9BCpALYPnZQye0FbbC1OMjoHP4XXMW+8z17ujQFcPFS90yqxGaKnQYDDlvDmv 2h6kN8JXJbroN3LYlVpa+xZXjPpiRE3JSWmzHhR37cEdV1bwBkd4FUKJbZuIK77maDQY mVXg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=4COgZnp0miuQF4F2mz/bBye/0CIbPiSVj/Wj8NOJ+4A=; b=vtidN920k0VkIS6TGyQkXvrFgWxNI5rYIebXDV/e1H9ThpB5+ig43UGepPcDs6kzvp V55w7bh2daUUoddEw0TohjKvHRm8m8XIBNoLRxj+cUTTj9nLS3DOrAxfYijdqHWbGhKj Q5BSz1j8YXpJUkeNH3akcD34dj3J+vENYuYLcz4Ve15Mg36K0qm/bn100bMSSFJqmhdg Ip2S/i66c1nLrabzcMHMEVl3XSGW2/hsgBhqEuRsR1lJdPc9dTGigDutsntfxHiExTx4 oAwHRfCjRwHUgLG9xyjHEaDZfMqxlUJHImUFzHitsQ2dkF/qyQ6m+93/iEBIz31+9y0m cpsA== X-Gm-Message-State: AOAM532ZhxLtP8helX3lbz4X8aM2t8DrgL92skG4Ll3ABIdaCcUF6IOI Kh2OavkXoCPfYt1okrSOZr0ctUiEXns= X-Google-Smtp-Source: ABdhPJzZXI8ZLcJwT4SQRkT3remZotDozJF/LCHRBm0FSWH84w7Bpp3PP1Yx7lLQDI3+MHibkNS+Zw== X-Received: by 2002:a05:6a00:781:b0:4f4:2a:2d89 with SMTP id g1-20020a056a00078100b004f4002a2d89mr12745027pfu.13.1646661934544; Mon, 07 Mar 2022 06:05:34 -0800 (PST) Received: from hoboy.vegasvil.org ([2601:640:8200:33:e2d5:5eff:fea5:802f]) by smtp.gmail.com with ESMTPSA id s17-20020a17090a441100b001bc1b59fe1asm18912352pjg.38.2022.03.07.06.05.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Mar 2022 06:05:33 -0800 (PST) Date: Mon, 7 Mar 2022 06:05:31 -0800 From: Richard Cochran To: Michael Walle Cc: gerhard@engleder-embedded.com, davem@davemloft.net, kuba@kernel.org, mlichvar@redhat.com, netdev@vger.kernel.org, vinicius.gomes@intel.com, yangbo.lu@nxp.com Subject: Re: [RFC PATCH net-next 0/6] ptp: Support hardware clocks with additional free running time Message-ID: <20220307140531.GA29247@hoboy.vegasvil.org> References: <20220306085658.1943-1-gerhard@engleder-embedded.com> <20220307120751.3484125-1-michael@walle.cc> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220307120751.3484125-1-michael@walle.cc> User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On Mon, Mar 07, 2022 at 01:07:51PM +0100, Michael Walle wrote: > Richard Cochran wrote: > > You are adding eight bytes per frame for what is arguably an extreme > > niche case. > > I don't think it is a niche case, btw. I was always wondering why > NXP introduced the vclock thingy. And apparently it is for > 802.1AS-rev, but one use case for that is 802.1Qbv and there you'll > need a (synchronized) hardware clock to control the gates. So while > we can have multiple time domain support with the vclock, we cannot > use Qbv with them. That was something I have always wondered about. > Or.. maybe I'm missing something here. Niche is relative. Believe it or not, the overwhelmingly great majority of people using Linux have no interest in TSN. Thanks, Richard