Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753841Ab3EUK17 (ORCPT ); Tue, 21 May 2013 06:27:59 -0400 Received: from mga09.intel.com ([134.134.136.24]:21289 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753167Ab3EUK16 (ORCPT ); Tue, 21 May 2013 06:27:58 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.87,713,1363158000"; d="scan'208";a="340722912" Message-ID: <519B4C0D.3040602@linux.intel.com> Date: Tue, 21 May 2013 13:27:25 +0300 From: Eliezer Tamir User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130328 Thunderbird/17.0.5 MIME-Version: 1.0 To: Or Gerlitz CC: David Miller , eilong@broadcom.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, jesse.brandeburg@intel.com, donald.c.skidmore@intel.com, e1000-devel@lists.sourceforge.net, willemb@google.com, andi@firstfloor.org, hpa@zytor.com, eliezer@tamir.org.il Subject: Re: [PATCH v3 net-next 3/4] ixgbe: Add support for ndo_ll_poll References: <1369120003.25971.2.camel@lb-tlvb-eilong.il.broadcom.com> <20130521.001444.1361294042663568537.davem@davemloft.net> <20130521.013912.96249995742935192.davem@davemloft.net> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1079 Lines: 26 On 21/05/2013 11:43, Or Gerlitz wrote: > On Tue, May 21, 2013 at 11:39 AM, David Miller wrote: > >> It's one of those "implementation details", I hate it too. > > Maybe if we bake it on this list little further we can see how to get > away from that, or what's the most non ugly way for that? I'm all for proper review and fixing any issues before forcing "ugliness" and "black magic" on unsuspecting users. Having said that, you failed to mention that your company sells userspace stack replacements. Informal testing I did convinces me that for a given HW, the latencies you get with this patchset and with userspace busy-polling are about the same. (This is my personal opinion, I'm not authorized to talk on behalf of my company or anyone else.) Why don't you try it out and tell us what you find. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/