From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id B0C68A2EDB for ; Mon, 30 Sep 2019 11:04:17 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 8B8AD343C; Mon, 30 Sep 2019 11:04:17 +0200 (CEST) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by dpdk.org (Postfix) with ESMTP id 89BEE3256 for ; Mon, 30 Sep 2019 11:04:16 +0200 (CEST) Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 0694718C8911; Mon, 30 Sep 2019 09:04:16 +0000 (UTC) Received: from [10.36.112.53] (ovpn-112-53.ams2.redhat.com [10.36.112.53]) by smtp.corp.redhat.com (Postfix) with ESMTPS id F404960872; Mon, 30 Sep 2019 09:04:14 +0000 (UTC) To: Noa Ezra Cc: matan@mellanox.com, dev@dpdk.org References: <1560924825-220648-1-git-send-email-noae@mellanox.com> <1560924825-220648-3-git-send-email-noae@mellanox.com> From: Maxime Coquelin Autocrypt: addr=maxime.coquelin@redhat.com; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.1.0 MIME-Version: 1.0 In-Reply-To: <1560924825-220648-3-git-send-email-noae@mellanox.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.70]); Mon, 30 Sep 2019 09:04:16 +0000 (UTC) Subject: Re: [dpdk-dev] [PATCH 2/2] net/vhost: support mrg-rxbuf disabling X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" On 6/19/19 8:13 AM, Noa Ezra wrote: > Rx mergeable buffers is a virtio feature that allows chaining of > multiple virtio descriptors to handle large packet size. > This behavior is supported and enabled by default, however in case > the user knows that rx mergeable buffers are not needed, he can disable > the feature. > The user should also set mrg_rxbuf=off in virtual machine's xml. > > Signed-off-by: Noa Ezra > Reviewed-by: Matan Azrad > --- > doc/guides/nics/vhost.rst | 5 +++++ > drivers/net/vhost/rte_eth_vhost.c | 17 ++++++++++++++++- > 2 files changed, 21 insertions(+), 1 deletion(-) > As stated earlier, I will not apply this patch because feature disabling should be done at Vhost-user master side. The exception are for features that require specific support from the application, such as TSO or postcopy. Regards, Maxime