From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by dpdk.org (Postfix) with ESMTP id 8396D2BAC for ; Wed, 16 Mar 2016 09:22:07 +0100 (CET) Received: from int-mx13.intmail.prod.int.phx2.redhat.com (int-mx13.intmail.prod.int.phx2.redhat.com [10.5.11.26]) by mx1.redhat.com (Postfix) with ESMTPS id CB7FD1E2A; Wed, 16 Mar 2016 08:22:06 +0000 (UTC) Received: from sopuli.koti.laiskiainen.org (vpn1-6-187.ams2.redhat.com [10.36.6.187]) by int-mx13.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u2G8M5bD007456; Wed, 16 Mar 2016 04:22:05 -0400 To: Ferruh Yigit , 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> <56E91720.5070607@intel.com> Cc: David Marchand , Helin Zhang From: Panu Matilainen Message-ID: <56E917AD.2060701@redhat.com> Date: Wed, 16 Mar 2016 10:22:05 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0 MIME-Version: 1.0 In-Reply-To: <56E91720.5070607@intel.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.68 on 10.5.11.26 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 08:22:07 -0000 On 03/16/2016 10:19 AM, Ferruh Yigit wrote: > 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. Hum, now I'm confused. I was under the impression everybody hated KNI and wanted to get rid of it, and certainly not build future solutions on top of it? - Panu - > > Regards, > ferruh >