From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bruce Richardson Subject: Re: [PATCH v8 1/3] i40e: support floating VEB config Date: Thu, 9 Jun 2016 16:50:13 +0100 Message-ID: <20160609155013.GF12520@bricha3-MOBL3> References: <1458895321-21896-1-git-send-email-zhe.tao@intel.com> <1464110886-9504-1-git-send-email-zhe.tao@intel.com> <1464110886-9504-2-git-send-email-zhe.tao@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: dev@dpdk.org, jingjing.wu@intel.com To: Zhe Tao Return-path: Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by dpdk.org (Postfix) with ESMTP id 0B4C82716 for ; Thu, 9 Jun 2016 17:50:29 +0200 (CEST) Content-Disposition: inline In-Reply-To: <1464110886-9504-2-git-send-email-zhe.tao@intel.com> List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" On Wed, May 25, 2016 at 01:28:04AM +0800, Zhe Tao wrote: > Add the new floating related argument option in the devarg. > Using this parameter, all the samples can decide whether to use legacy VEB/VEPA > or floating VEB. > To enable this feature, the user should pass a devargs parameter to the EAL > like "-w 84:00.0,enable_floating=1", and the application will make sure the PMD > will use the floating VEB feature for all the VFs created by this PF device. > > Signed-off-by: Zhe Tao > --- > drivers/net/i40e/i40e_ethdev.c | 44 ++++++++++++++++++++++++++++++++++++++++++ > drivers/net/i40e/i40e_ethdev.h | 6 ++++++ > 2 files changed, 50 insertions(+) I don't think we should ever use the word "floating" in this context without the word "VEB" on it as well, because it's really meaningless - being an adjective, it always requires a noun will it. This applies both to cmdline arguments and to commit messages. Secondly, these patches really could do with an explanation of what a floating VEB is and what it can do vs a non-floating VEB. I know that in the second patch you refer to standards which define VEBs, but: a) why is that reference not in patch 1? b) when I tried looking it up the spec requires a login for the IEEE site, and a google search for "floating VEB" only brings up links to these patches in patchwork. Regards, /Bruce