From patchwork Fri Nov 23 03:00:13 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jason Wang X-Patchwork-Id: 10695011 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 593C914DE for ; Fri, 23 Nov 2018 03:01:12 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4A89B2C043 for ; Fri, 23 Nov 2018 03:01:12 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 48CD02C43F; Fri, 23 Nov 2018 03:01:12 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 035FC2C043 for ; Fri, 23 Nov 2018 03:01:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2393069AbeKWNm6 (ORCPT ); Fri, 23 Nov 2018 08:42:58 -0500 Received: from mx1.redhat.com ([209.132.183.28]:57536 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729576AbeKWNm6 (ORCPT ); Fri, 23 Nov 2018 08:42:58 -0500 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 5D3FA7F416; Fri, 23 Nov 2018 03:00:39 +0000 (UTC) Received: from jason-ThinkPad-T450s.redhat.com (ovpn-12-159.pek2.redhat.com [10.72.12.159]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6C52A7E394; Fri, 23 Nov 2018 03:00:18 +0000 (UTC) From: Jason Wang To: mst@redhat.com, jasowang@redhat.com, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net-next 0/3] basic in order support for vhost_net Date: Fri, 23 Nov 2018 11:00:13 +0800 Message-Id: <20181123030016.4924-1-jasowang@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Fri, 23 Nov 2018 03:00:39 +0000 (UTC) Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Hi: This series implement basic in order feature support for vhost_net. This feature requires both driver and device to use descriptors in order which can simplify the implementation and optimizaton for both side. The series also implement a simple optimization that avoid read available ring. Test shows 10% performance improvement. More optimizations could be done on top. Jason Wang (3): virtio: introduce in order feature bit vhost_net: support in order feature vhost: don't touch avail ring if in_order is negotiated drivers/vhost/net.c | 6 ++++-- drivers/vhost/vhost.c | 19 ++++++++++++------- include/uapi/linux/virtio_config.h | 6 ++++++ 3 files changed, 22 insertions(+), 9 deletions(-)