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=-0.9 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham 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 0CDBEC43387 for ; Sat, 15 Dec 2018 21:15:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 94D902084D for ; Sat, 15 Dec 2018 21:15:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729419AbeLOVPI (ORCPT ); Sat, 15 Dec 2018 16:15:08 -0500 Received: from shards.monkeyblade.net ([23.128.96.9]:55778 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727206AbeLOVPI (ORCPT ); Sat, 15 Dec 2018 16:15:08 -0500 Received: from localhost (unknown [IPv6:2601:601:9f80:35cd::cf9]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) (Authenticated sender: davem-davemloft) by shards.monkeyblade.net (Postfix) with ESMTPSA id 7AC0014E8B9BD; Sat, 15 Dec 2018 13:15:07 -0800 (PST) Date: Sat, 15 Dec 2018 13:15:06 -0800 (PST) Message-Id: <20181215.131506.1592727721701772545.davem@davemloft.net> To: jasowang@redhat.com Cc: mst@redhat.com, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH net-next 3/3] vhost: access vq metadata through kernel virtual address From: David Miller In-Reply-To: References: <20181213101022.12475-4-jasowang@redhat.com> <20181213102713-mutt-send-email-mst@kernel.org> X-Mailer: Mew version 6.8 on Emacs 26.1 Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Sat, 15 Dec 2018 13:15:07 -0800 (PST) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jason Wang Date: Fri, 14 Dec 2018 11:57:35 +0800 > This is the price of all GUP users not only vhost itself. What's more > important, the goal is not to be left too much behind for other > backends like DPDK or AF_XDP (all of which are using GUP). +1