From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F2282C28CC5 for ; Mon, 10 Jun 2019 03:51:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D5F3620820 for ; Mon, 10 Jun 2019 03:51:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387593AbfFJDu6 (ORCPT ); Sun, 9 Jun 2019 23:50:58 -0400 Received: from mx1.redhat.com ([209.132.183.28]:54932 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387457AbfFJDu6 (ORCPT ); Sun, 9 Jun 2019 23:50:58 -0400 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id D9A5D3082B15; Mon, 10 Jun 2019 03:50:57 +0000 (UTC) Received: from [10.72.12.206] (ovpn-12-206.pek2.redhat.com [10.72.12.206]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1AB5660BEC; Mon, 10 Jun 2019 03:50:46 +0000 (UTC) Subject: Re: [PATCH net-next 0/6] vhost: accelerate metadata access To: "Michael S. Tsirkin" Cc: kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, peterx@redhat.com, James.Bottomley@hansenpartnership.com, hch@infradead.org, davem@davemloft.net, jglisse@redhat.com, linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, linux-parisc@vger.kernel.org, christophe.de.dinechin@gmail.com, jrdr.linux@gmail.com References: <20190524081218.2502-1-jasowang@redhat.com> <20190605162631-mutt-send-email-mst@kernel.org> From: Jason Wang Message-ID: Date: Mon, 10 Jun 2019 11:50:45 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.0 MIME-Version: 1.0 In-Reply-To: <20190605162631-mutt-send-email-mst@kernel.org> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.45]); Mon, 10 Jun 2019 03:50:58 +0000 (UTC) Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On 2019/6/6 上午4:27, Michael S. Tsirkin wrote: > On Fri, May 24, 2019 at 04:12:12AM -0400, Jason Wang wrote: >> Hi: >> >> This series tries to access virtqueue metadata through kernel virtual >> address instead of copy_user() friends since they had too much >> overheads like checks, spec barriers or even hardware feature >> toggling like SMAP. This is done through setup kernel address through >> direct mapping and co-opreate VM management with MMU notifiers. >> >> Test shows about 23% improvement on TX PPS. TCP_STREAM doesn't see >> obvious improvement. >> >> Thanks > Thanks this is queued for next. > > Did you want to rebase and repost packed ring support on top? > IIUC it's on par with split ring with these patches. > > Yes, it's on the way. Thanks