From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by dpdk.org (Postfix) with ESMTP id 0A3E52934 for ; Wed, 16 Mar 2016 09:19:47 +0100 (CET) Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga103.jf.intel.com with ESMTP; 16 Mar 2016 01:19:48 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.24,343,1455004800"; d="scan'208";a="938231947" Received: from jhalimi-mobl1.amr.corp.intel.com (HELO [10.252.5.119]) ([10.252.5.119]) by fmsmga002.fm.intel.com with ESMTP; 16 Mar 2016 01:19:45 -0700 To: Panu Matilainen , dev@dpdk.org References: <1455858349-14639-1-git-send-email-ferruh.yigit@intel.com> <1457522269-2198-1-git-send-email-ferruh.yigit@intel.com> <56E6D9A4.4090705@intel.com> <56E90A9F.4020608@redhat.com> Cc: David Marchand , Helin Zhang From: Ferruh Yigit Message-ID: <56E91720.5070607@intel.com> Date: Wed, 16 Mar 2016 08:19:44 +0000 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0 MIME-Version: 1.0 In-Reply-To: <56E90A9F.4020608@redhat.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Subject: Re: [dpdk-dev] [PATCH v3 0/2] slow data path communication between DPDK port and Linux X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Mar 2016 08:19:48 -0000 On 3/16/2016 7:26 AM, Panu Matilainen wrote: > On 03/14/2016 05:32 PM, Ferruh Yigit wrote: >> On 3/9/2016 11:17 AM, Ferruh Yigit wrote: >>> This patch sent to keep record of latest status of the work. >>> >>> >>> This is slow data path communication implementation based on existing KNI. >>> >>> Difference is: librte_kni converted into a PMD, kdp kernel module is almost >>> same except all control path functionality removed and some simplification done. >>> >>> Motivation is to simplify slow path data communication. >>> Now any application can use this new PMD to send/get data to Linux kernel. >>> >>> PMD supports two communication methods: >>> >>> 1) KDP kernel module >>> PMD initialization functions handles creating virtual interfaces (with help of >>> kdp kernel module) and created FIFO. FIFO is used to share data between >>> userspace and kernelspace. This is default method. >>> >>> 2) tun/tap module >>> When KDP module is not inserted, PMD creates tap interface and transfers >>> packets using tap interface. >>> >>> In long term this patch intends to replace the KNI and KNI will be >>> depreciated. >>> >> >> Self-NACK: Will work on another option that does not introduce new >> kernel module. >> > > Hmm, care to elaborate a bit? The second mode of this PMD already was > free of external kernel modules. Do you mean you'll be just removing > mode 1) from the PMD or looking at something completely different? > > Just thinking that tun/tap PMD sounds like a useful thing to have, I > hope you're not abandoning that. > It will be KNI PMD. Plan is to have something like KDP, but with existing KNI kernel module. There will be tun/tap support as fallback. Regards, ferruh