From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754735AbcAMVcJ (ORCPT ); Wed, 13 Jan 2016 16:32:09 -0500 Received: from mail-wm0-f67.google.com ([74.125.82.67]:33258 "EHLO mail-wm0-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753614AbcAMVcC (ORCPT ); Wed, 13 Jan 2016 16:32:02 -0500 Date: Wed, 13 Jan 2016 22:31:56 +0100 From: Richard Cochran To: "Christopher S. Hall" Cc: tglx@linutronix.de, mingo@redhat.com, john.stultz@linaro.org, hpa@zytor.com, jeffrey.t.kirsher@intel.com, x86@kernel.org, linux-kernel@vger.kernel.org, intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org, kevin.b.stanton@intel.com Subject: Re: [PATCH v6 8/9] Add PTP_SYS_OFFSET_PRECISE for driver crosstimestamping Message-ID: <20160113213156.GB20252@localhost.localdomain> References: <1452687149-11281-1-git-send-email-christopher.s.hall@intel.com> <1452687149-11281-9-git-send-email-christopher.s.hall@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1452687149-11281-9-git-send-email-christopher.s.hall@intel.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jan 13, 2016 at 04:12:28AM -0800, Christopher S. Hall wrote: > Currently, network /system cross-timestamping is performed in the > PTP_SYS_OFFSET ioctl. The PTP clock driver reads gettimeofday() and > the gettime64() callback provided by the driver. The cross-timestamp > is best effort where the latency between the capture of system time > (getnstimeofday()) and the device time (driver callback) may be > significant. Looks good to me. Acked-by: Richard Cochran