From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [net-next PATCH 1/3] vxge: always enable hardware time stamp Date: Sun, 10 Apr 2011 18:58:45 -0700 (PDT) Message-ID: <20110410.185845.70188298.davem@davemloft.net> References: <1302297083-22665-1-git-send-email-jdmason@kudzu.us> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org To: jdmason@kudzu.us Return-path: Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:46507 "EHLO sunset.davemloft.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753802Ab1DKB7W (ORCPT ); Sun, 10 Apr 2011 21:59:22 -0400 In-Reply-To: <1302297083-22665-1-git-send-email-jdmason@kudzu.us> Sender: netdev-owner@vger.kernel.org List-ID: From: Jon Mason Date: Fri, 8 Apr 2011 16:11:21 -0500 > Hardware time stamp calculation can only be enabled by the privileged > function. Enable it always by default and simply use the ethtool > interface to set a flag to indicate whether or not the respective > function driver should indicate the timestamp along with the received > packet. > > Also, make certain fields in vxge_hw_device_config bit-fields to reduce > the size of the struct. > > Signed-off-by: Jon Mason Doesn't this have some performance or latency impact? I think it should be stay off by default, people who want this know they want it and can turn it on if they want to.