From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1423359AbcFMNLA (ORCPT ); Mon, 13 Jun 2016 09:11:00 -0400 Received: from mout.kundenserver.de ([212.227.17.13]:53588 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1422821AbcFMNK7 (ORCPT ); Mon, 13 Jun 2016 09:10:59 -0400 From: Arnd Bergmann To: Richard Cochran Cc: Henrik Austad , linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, alsa-devel@vger.kernel.org, netdev@vger.kernel.org, henrk@austad.us Subject: Re: [very-RFC 0/8] TSN driver for the kernel Date: Mon, 13 Jun 2016 15:12:24 +0200 Message-ID: <3650675.mUADb08Tiz@wuerfel> User-Agent: KMail/5.1.3 (Linux/4.4.0-22-generic; KDE/5.18.0; x86_64; ; ) In-Reply-To: <20160613114713.GA9544@localhost.localdomain> References: <1465686096-22156-1-git-send-email-henrik@austad.us> <20160613114713.GA9544@localhost.localdomain> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" X-Provags-ID: V03:K0:/rfryATvbDQrQ9ZdriO97Vh7PRHbRSJCuypTTmMGHPvxecJi9zM fOYhryho0XxfPg9brRUL4uB4AtTHq7cYqoajHWh9P8WNS1ZsLznVILQClj7iUoiWh/JGjQX WRJ9Q62otXJhR4px1KgnwlDklcN5eScu9OUXdW2J8Z1vW4yDzhtWpDFxHdAZW0AS3nWlff2 FKn/7S20KiUl7mPgnCc1A== X-UI-Out-Filterresults: notjunk:1;V01:K0:dsPXlotm7vc=:hbhSE9qwVoe9a/ErNcPe5/ BbBKKrnHD3tQxSxvEQqAf5+NMQZSofXSrGDMCWQwEUQmuANQ+ES3pOKeK8y4/0fwCEsB3kg9B OlxcDwBjy8ANhM7RO+GV6LYQ0mQnN5bO2jrfrRMYfeOyEMiSZ9iPDQXldvRgkQfiojxZWb2gQ ieM83OkR8XdxlTU9G1ylW0Cs6wLC8FMNsKY8QPj+5fXUTuK/bSbxWMfuRYkHHi83KfWpU2Flu TlbWolEztND4EKhFrVcciZGCUbKBhL54KRVECMJaEQtoFCjEEm044Hnd5QnMdilpYLrWH94Zn SPqiQT9C3BILNPAshnTtVEdFO2ci1K0VYiGgGViVcKktYar14cDoF8DDWXJ/Ahk48ub/OWMD1 P4JWMPBWlZJFQfa3XguSS9CNE1Zqk3g7qD0gxwi8M6nX7Iwk6abbj62gVp87BDI5F4nNV8wSx L62NRhCg91pCwbBofTJXJZNYDCfg06LLgkDK1kRSjv7W5utRMtCxQAj6DRWYUvJiEhaWXdNZr x1VOKHrf4IEFPh2D01Zx2SF/UgYxiRMmGqF15AnqfCoqrbjD4VtRHH81E7nLaTCJcBYDKkss+ FVFBxmFCx/9C54Zl+xIQPkU9Ej0LV9hszQ32BgWHtaWNPczh1pvqsm2dH876/bfA8qW3RZyaO 5Bd7wuYV2zTUKNezasblkyuuK2qA6DoIYp8zWFynYpnl0MFcuj4/23xfd9QlYjviYN2RWD5TT JLSx4bFxK8W+j5/b Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Monday, June 13, 2016 1:47:13 PM CEST Richard Cochran wrote: > * Kernel Space > > 1. Providing frames with a future transmit time. For normal sockets, > this can be in the CMESG data. For mmap'ed buffers, we will need a > new format. (I think Arnd is working on a new layout.) > After some back and forth, I think the conclusion for now was that the timestamps in the current v3 format are sufficient until 2106 as long as we treat them as 'unsigned', so we don't need the new format for y2038, but if we get a new format, that should definitely use 64-bit timestamps because that is the right thing to do. Arnd