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=-7.6 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 5C03BC11F66 for ; Tue, 29 Jun 2021 04:13:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 40A1E61CC7 for ; Tue, 29 Jun 2021 04:13:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231462AbhF2EPk (ORCPT ); Tue, 29 Jun 2021 00:15:40 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:53787 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229562AbhF2EPj (ORCPT ); Tue, 29 Jun 2021 00:15:39 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1624939992; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=7N6S5aXlTsxjRnLUAwuT1GGB2dsJH/gvDpQ3UzIqM0M=; b=SzUh/i8W2tjOYdKVVA/eEfddfMy1StTwJiTZYSj8HAtZ68CiWJ874FtLqq+cdtz+G0LEXY vkI1Z7GBb5PCxfQwmWZ6uZGDH2stkTWWqiZT4Su5U3MaKm7lK7PwFtdxziuC9eW84yu2Z9 hfBlLce79yj+OthZpYL/4Tk8tdmefIw= Received: from mail-pj1-f71.google.com (mail-pj1-f71.google.com [209.85.216.71]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-325-8pK7UFR_MRmNSv6HWDvWBA-1; Tue, 29 Jun 2021 00:13:08 -0400 X-MC-Unique: 8pK7UFR_MRmNSv6HWDvWBA-1 Received: by mail-pj1-f71.google.com with SMTP id go14-20020a17090b03ceb02901709d30a8a1so1389930pjb.5 for ; Mon, 28 Jun 2021 21:13:08 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-transfer-encoding :content-language; bh=7N6S5aXlTsxjRnLUAwuT1GGB2dsJH/gvDpQ3UzIqM0M=; b=nYAnkZF3F74MdaZ5NhJfxvBxv/heVqdNaXkW11m4o0CHIxQzE5SnMdLwv6h0B3AoqV nMMRGGDbExq8aVu6u7lHrGMcjKV/VSesp2rK1m2Bs4/v3bSxfMmtiyEYu1bQG/Iknp0p whaUhriUMZONUeA8BGSomuFtqvPcfUO+Bz7W1oLL1fkqXtSsz8ODvEkoqFwURYhNFhrZ xlLEVAzw2d1hkfTgm0ZIFqCBnGPvfBnc1M+IoRdb+XKy8YY1bkoWkio2s0E11C2fo7yn 4b0AkRrZd3mVOhMaIBI1JACbipR2p5iZNJ/C5U0RNDsEaH1p6oBUYKfW7AFU/Y/q7VLa jV2w== X-Gm-Message-State: AOAM530XlFkrpdKltuOHFEJ/2n+60jGibgSeOaAsy6GgHe/wOC3viAhN 8saQ/WHCmRwCuc/jK111S+wTBLwTIGSDuJz9mPuNPQw++8y/idk3JrF6rCo1JX0/5sEQ6NNNNeO VpIfniTYq8TJCwkwe1W040Ywg X-Received: by 2002:a65:478d:: with SMTP id e13mr26587079pgs.37.1624939987923; Mon, 28 Jun 2021 21:13:07 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxTnV+jCJcWth5Gh1PanbNwyDV44mMvsm0eLCzSFKGOg12/3H6rwksZzo35n3QJumwiuRcZHQ== X-Received: by 2002:a65:478d:: with SMTP id e13mr26587053pgs.37.1624939987713; Mon, 28 Jun 2021 21:13:07 -0700 (PDT) Received: from wangxiaodeMacBook-Air.local ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id k13sm1525904pgh.82.2021.06.28.21.12.59 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 28 Jun 2021 21:13:07 -0700 (PDT) Subject: Re: [PATCH v8 00/10] Introduce VDUSE - vDPA Device in Userspace To: Yongji Xie , Liu Xiaodong Cc: Xie Yongji , "Michael S. Tsirkin" , Stefan Hajnoczi , sgarzare@redhat.com, parav@nvidia.com, hch@infradead.org, christian.brauner@canonical.com, rdunlap@infradead.org, willy@infradead.org, viro@zeniv.linux.org.uk, axboe@kernel.dk, bcrl@kvack.org, corbet@lwn.net, mika.penttila@nextfour.com, dan.carpenter@oracle.com, joro@8bytes.org, gregkh@linuxfoundation.org, kvm@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, iommu@lists.linux-foundation.org, songmuchun@bytedance.com, linux-fsdevel@vger.kernel.org References: <20210615141331.407-1-xieyongji@bytedance.com> <20210628103309.GA205554@storage2.sh.intel.com> From: Jason Wang Message-ID: Date: Tue, 29 Jun 2021 12:12:57 +0800 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 在 2021/6/28 下午6:32, Yongji Xie 写道: >> The large barrier is bounce-buffer mapping: SPDK requires hugepages >> for NVMe over PCIe and RDMA, so take some preallcoated hugepages to >> map as bounce buffer is necessary. Or it's hard to avoid an extra >> memcpy from bounce-buffer to hugepage. >> If you can add an option to map hugepages as bounce-buffer, >> then SPDK could also be a potential user of vduse. >> > I think we can support registering user space memory for bounce-buffer > use like XDP does. But this needs to pin the pages, so I didn't > consider it in this initial version. > Note that userspace should be unaware of the existence of the bounce buffer. So we need to think carefully of mmap() vs umem registering. Thanks 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=-5.1 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 10123C11F66 for ; Tue, 29 Jun 2021 04:13:19 +0000 (UTC) Received: from smtp2.osuosl.org (smtp2.osuosl.org [140.211.166.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B577461D53 for ; Tue, 29 Jun 2021 04:13:18 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B577461D53 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp2.osuosl.org (Postfix) with ESMTP id 7D5D440232; Tue, 29 Jun 2021 04:13:18 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp2.osuosl.org ([127.0.0.1]) by localhost (smtp2.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id mVCQ7w3vVf6o; Tue, 29 Jun 2021 04:13:17 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by smtp2.osuosl.org (Postfix) with ESMTPS id 51EFE400DE; Tue, 29 Jun 2021 04:13:17 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 211A7C001A; Tue, 29 Jun 2021 04:13:17 +0000 (UTC) Received: from smtp2.osuosl.org (smtp2.osuosl.org [140.211.166.133]) by lists.linuxfoundation.org (Postfix) with ESMTP id B10BDC000E for ; Tue, 29 Jun 2021 04:13:15 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp2.osuosl.org (Postfix) with ESMTP id 9B80440232 for ; Tue, 29 Jun 2021 04:13:15 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp2.osuosl.org ([127.0.0.1]) by localhost (smtp2.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id bfAzEwYk7IQP for ; Tue, 29 Jun 2021 04:13:15 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by smtp2.osuosl.org (Postfix) with ESMTPS id E5C79400DE for ; Tue, 29 Jun 2021 04:13:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1624939993; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=7N6S5aXlTsxjRnLUAwuT1GGB2dsJH/gvDpQ3UzIqM0M=; b=de10XCib3R7RBtNayfm/Uju9GOggjYSz7IGmZyfGySF/Djyuyel6VwSnQE+c1Pe6yRcWpO KxpxcqrwtapRYlsXDG32nc6IBOLW/zZOMbZKocmKVFBJfDbgZWYdyqGbzNw3A72UTc0jzd aAt5NJcNMgJ5S1Dx1EfSpoVELUrc48M= Received: from mail-pg1-f200.google.com (mail-pg1-f200.google.com [209.85.215.200]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-352-l3LDxWFQNIOKnUVPByfy2A-1; Tue, 29 Jun 2021 00:13:09 -0400 X-MC-Unique: l3LDxWFQNIOKnUVPByfy2A-1 Received: by mail-pg1-f200.google.com with SMTP id j17-20020a63cf110000b0290226eb0c27acso13033051pgg.23 for ; Mon, 28 Jun 2021 21:13:08 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-transfer-encoding :content-language; bh=7N6S5aXlTsxjRnLUAwuT1GGB2dsJH/gvDpQ3UzIqM0M=; b=VvqT2fxOhGTWfh7fsiVfv6xz48jAUuQd9XgvxagWge5LkJLYGB/VWM337RD9jj1tbj 5AY7++klqf/vZVhidgJsTh1BdPzOt9oZfgfe8y2OURErTq8+ddgHZu1gttbnLKR6uALX 59B8YmRoZEPyYNNOIOPRSJE7GBgay5vhLYre7gUySCJb2RN66Ovkbubs70Lufy+sy/EV YEY+LPZQ4UU9vF7EaBHw4xFs+frCU9VKCIsFjv9FYZAxLaBq4ZnS3PFr7DVJPkLji7OB 8XPJyQ1tcKV0aMsIzxxtZNNteqxGj6Lbuvz9DGQX8Mq6b+VZx+TO3Mtm0c+utUn53b38 m64w== X-Gm-Message-State: AOAM532ed01YGusrV+pD8mezq+LTC3bDD7QB9z4mdbk0Ta8WKnzw1sFa Z36fi0fDfbNtsECf8cIulNk3AGrRHfKUk2K9+n/PR1o53VHpaq/uZFY/mf6Sn/sNO0Obuu5KNCr VF+RpV2FUTFPf5gsQk7ac+A5dcgaEIw== X-Received: by 2002:a65:478d:: with SMTP id e13mr26587080pgs.37.1624939987923; Mon, 28 Jun 2021 21:13:07 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxTnV+jCJcWth5Gh1PanbNwyDV44mMvsm0eLCzSFKGOg12/3H6rwksZzo35n3QJumwiuRcZHQ== X-Received: by 2002:a65:478d:: with SMTP id e13mr26587053pgs.37.1624939987713; Mon, 28 Jun 2021 21:13:07 -0700 (PDT) Received: from wangxiaodeMacBook-Air.local ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id k13sm1525904pgh.82.2021.06.28.21.12.59 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 28 Jun 2021 21:13:07 -0700 (PDT) Subject: Re: [PATCH v8 00/10] Introduce VDUSE - vDPA Device in Userspace To: Yongji Xie , Liu Xiaodong References: <20210615141331.407-1-xieyongji@bytedance.com> <20210628103309.GA205554@storage2.sh.intel.com> From: Jason Wang Message-ID: Date: Tue, 29 Jun 2021 12:12:57 +0800 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=jasowang@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Cc: kvm@vger.kernel.org, "Michael S. Tsirkin" , virtualization@lists.linux-foundation.org, christian.brauner@canonical.com, corbet@lwn.net, willy@infradead.org, hch@infradead.org, Xie Yongji , dan.carpenter@oracle.com, sgarzare@redhat.com, viro@zeniv.linux.org.uk, Stefan Hajnoczi , songmuchun@bytedance.com, axboe@kernel.dk, gregkh@linuxfoundation.org, rdunlap@infradead.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, bcrl@kvack.org, netdev@vger.kernel.org, linux-fsdevel@vger.kernel.org, mika.penttila@nextfour.com X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" CuWcqCAyMDIxLzYvMjgg5LiL5Y2INjozMiwgWW9uZ2ppIFhpZSDlhpnpgZM6Cj4+IFRoZSBsYXJn ZSBiYXJyaWVyIGlzIGJvdW5jZS1idWZmZXIgbWFwcGluZzogU1BESyByZXF1aXJlcyBodWdlcGFn ZXMKPj4gZm9yIE5WTWUgb3ZlciBQQ0llIGFuZCBSRE1BLCBzbyB0YWtlIHNvbWUgcHJlYWxsY29h dGVkIGh1Z2VwYWdlcyB0bwo+PiBtYXAgYXMgYm91bmNlIGJ1ZmZlciBpcyBuZWNlc3NhcnkuIE9y IGl0J3MgaGFyZCB0byBhdm9pZCBhbiBleHRyYQo+PiBtZW1jcHkgZnJvbSBib3VuY2UtYnVmZmVy IHRvIGh1Z2VwYWdlLgo+PiBJZiB5b3UgY2FuIGFkZCBhbiBvcHRpb24gdG8gbWFwIGh1Z2VwYWdl cyBhcyBib3VuY2UtYnVmZmVyLAo+PiB0aGVuIFNQREsgY291bGQgYWxzbyBiZSBhIHBvdGVudGlh bCB1c2VyIG9mIHZkdXNlLgo+Pgo+IEkgdGhpbmsgd2UgY2FuIHN1cHBvcnQgcmVnaXN0ZXJpbmcg dXNlciBzcGFjZSBtZW1vcnkgZm9yIGJvdW5jZS1idWZmZXIKPiB1c2UgbGlrZSBYRFAgZG9lcy4g QnV0IHRoaXMgbmVlZHMgdG8gcGluIHRoZSBwYWdlcywgc28gSSBkaWRuJ3QKPiBjb25zaWRlciBp dCBpbiB0aGlzIGluaXRpYWwgdmVyc2lvbi4KPgoKTm90ZSB0aGF0IHVzZXJzcGFjZSBzaG91bGQg YmUgdW5hd2FyZSBvZiB0aGUgZXhpc3RlbmNlIG9mIHRoZSBib3VuY2UgYnVmZmVyLgoKU28gd2Ug bmVlZCB0byB0aGluayBjYXJlZnVsbHkgb2YgbW1hcCgpIHZzIHVtZW0gcmVnaXN0ZXJpbmcuCgpU aGFua3MKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmlv bW11IG1haWxpbmcgbGlzdAppb21tdUBsaXN0cy5saW51eC1mb3VuZGF0aW9uLm9yZwpodHRwczov L2xpc3RzLmxpbnV4Zm91bmRhdGlvbi5vcmcvbWFpbG1hbi9saXN0aW5mby9pb21tdQ== 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=-5.1 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 6EEBDC11F67 for ; Tue, 29 Jun 2021 04:13:20 +0000 (UTC) Received: from smtp2.osuosl.org (smtp2.osuosl.org [140.211.166.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2ADFF61D4D for ; Tue, 29 Jun 2021 04:13:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2ADFF61D4D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=virtualization-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp2.osuosl.org (Postfix) with ESMTP id E92E040193; Tue, 29 Jun 2021 04:13:19 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp2.osuosl.org ([127.0.0.1]) by localhost (smtp2.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id JH2V8YpxHTTb; Tue, 29 Jun 2021 04:13:19 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [IPv6:2605:bc80:3010:104::8cd3:938]) by smtp2.osuosl.org (Postfix) with ESMTPS id 9176C400DE; Tue, 29 Jun 2021 04:13:18 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 5FDDBC001A; Tue, 29 Jun 2021 04:13:18 +0000 (UTC) Received: from smtp2.osuosl.org (smtp2.osuosl.org [140.211.166.133]) by lists.linuxfoundation.org (Postfix) with ESMTP id E1C33C000E for ; Tue, 29 Jun 2021 04:13:16 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp2.osuosl.org (Postfix) with ESMTP id CD60F400DE for ; Tue, 29 Jun 2021 04:13:15 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp2.osuosl.org ([127.0.0.1]) by localhost (smtp2.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id GXckKCnQpEhY for ; Tue, 29 Jun 2021 04:13:15 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [216.205.24.124]) by smtp2.osuosl.org (Postfix) with ESMTPS id 28ADB40193 for ; Tue, 29 Jun 2021 04:13:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1624939993; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=7N6S5aXlTsxjRnLUAwuT1GGB2dsJH/gvDpQ3UzIqM0M=; b=de10XCib3R7RBtNayfm/Uju9GOggjYSz7IGmZyfGySF/Djyuyel6VwSnQE+c1Pe6yRcWpO KxpxcqrwtapRYlsXDG32nc6IBOLW/zZOMbZKocmKVFBJfDbgZWYdyqGbzNw3A72UTc0jzd aAt5NJcNMgJ5S1Dx1EfSpoVELUrc48M= Received: from mail-pg1-f198.google.com (mail-pg1-f198.google.com [209.85.215.198]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-387-aZQXCKIjMemJIA2As_cgLw-1; Tue, 29 Jun 2021 00:13:08 -0400 X-MC-Unique: aZQXCKIjMemJIA2As_cgLw-1 Received: by mail-pg1-f198.google.com with SMTP id x9-20020a6541490000b0290222fe6234d6so7802519pgp.14 for ; Mon, 28 Jun 2021 21:13:08 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-transfer-encoding :content-language; bh=7N6S5aXlTsxjRnLUAwuT1GGB2dsJH/gvDpQ3UzIqM0M=; b=t9OnsV3/dTlCqHFtrmEn6Akybwu3syUpgxhQtV86c1QvvZ0O55p3XWxvB71NYYzbrM vCVJ9E7zXMhfG2BlGNW7GmB7eoq/DLmpBYyITpdcECmnDzvmXiCou1CWUMJ22JyVxrvE s5Sg1hKvXV/gu47Q8jV/NQwjXxIKKUwQkZrEvOnhtfLsDhDAf6UUGtAus3CVlvc/QhZY 7k2Ry5oUfuhiT+Fj2oZD4zZMQv4UDyVlNsbP9gv0AfVISzTaYDJsjB1L9wfserg/Khq4 sgBN2YH3p/IQpVZc91hdyT2I0bpAO6Mi26GnRmBjo+vF5Nge/QUhryBq7uBrmOmLnPJt Rl/w== X-Gm-Message-State: AOAM531IXeGdsKyUQHgvXQ6gf7B/EYIfn8M6oX4A2CePNn8TS7OYDekd nkKsCzHijOt3YQSTibdiPnpZ0gl1Sx4WaLGYXE2mvPUwxt8oIuyfmAzkpCRvZhznzdiTl5YS8wN bYj+H/StfXnwHEWmiCxwq82Zar33SCD3RLlpvqQ9F6A== X-Received: by 2002:a65:478d:: with SMTP id e13mr26587081pgs.37.1624939987924; Mon, 28 Jun 2021 21:13:07 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxTnV+jCJcWth5Gh1PanbNwyDV44mMvsm0eLCzSFKGOg12/3H6rwksZzo35n3QJumwiuRcZHQ== X-Received: by 2002:a65:478d:: with SMTP id e13mr26587053pgs.37.1624939987713; Mon, 28 Jun 2021 21:13:07 -0700 (PDT) Received: from wangxiaodeMacBook-Air.local ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id k13sm1525904pgh.82.2021.06.28.21.12.59 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 28 Jun 2021 21:13:07 -0700 (PDT) Subject: Re: [PATCH v8 00/10] Introduce VDUSE - vDPA Device in Userspace To: Yongji Xie , Liu Xiaodong References: <20210615141331.407-1-xieyongji@bytedance.com> <20210628103309.GA205554@storage2.sh.intel.com> From: Jason Wang Message-ID: Date: Tue, 29 Jun 2021 12:12:57 +0800 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=jasowang@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Cc: kvm@vger.kernel.org, "Michael S. Tsirkin" , virtualization@lists.linux-foundation.org, christian.brauner@canonical.com, corbet@lwn.net, joro@8bytes.org, willy@infradead.org, hch@infradead.org, Xie Yongji , dan.carpenter@oracle.com, viro@zeniv.linux.org.uk, Stefan Hajnoczi , songmuchun@bytedance.com, axboe@kernel.dk, gregkh@linuxfoundation.org, rdunlap@infradead.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, bcrl@kvack.org, netdev@vger.kernel.org, linux-fsdevel@vger.kernel.org, mika.penttila@nextfour.com X-BeenThere: virtualization@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux virtualization List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" CuWcqCAyMDIxLzYvMjgg5LiL5Y2INjozMiwgWW9uZ2ppIFhpZSDlhpnpgZM6Cj4+IFRoZSBsYXJn ZSBiYXJyaWVyIGlzIGJvdW5jZS1idWZmZXIgbWFwcGluZzogU1BESyByZXF1aXJlcyBodWdlcGFn ZXMKPj4gZm9yIE5WTWUgb3ZlciBQQ0llIGFuZCBSRE1BLCBzbyB0YWtlIHNvbWUgcHJlYWxsY29h dGVkIGh1Z2VwYWdlcyB0bwo+PiBtYXAgYXMgYm91bmNlIGJ1ZmZlciBpcyBuZWNlc3NhcnkuIE9y IGl0J3MgaGFyZCB0byBhdm9pZCBhbiBleHRyYQo+PiBtZW1jcHkgZnJvbSBib3VuY2UtYnVmZmVy IHRvIGh1Z2VwYWdlLgo+PiBJZiB5b3UgY2FuIGFkZCBhbiBvcHRpb24gdG8gbWFwIGh1Z2VwYWdl cyBhcyBib3VuY2UtYnVmZmVyLAo+PiB0aGVuIFNQREsgY291bGQgYWxzbyBiZSBhIHBvdGVudGlh bCB1c2VyIG9mIHZkdXNlLgo+Pgo+IEkgdGhpbmsgd2UgY2FuIHN1cHBvcnQgcmVnaXN0ZXJpbmcg dXNlciBzcGFjZSBtZW1vcnkgZm9yIGJvdW5jZS1idWZmZXIKPiB1c2UgbGlrZSBYRFAgZG9lcy4g QnV0IHRoaXMgbmVlZHMgdG8gcGluIHRoZSBwYWdlcywgc28gSSBkaWRuJ3QKPiBjb25zaWRlciBp dCBpbiB0aGlzIGluaXRpYWwgdmVyc2lvbi4KPgoKTm90ZSB0aGF0IHVzZXJzcGFjZSBzaG91bGQg YmUgdW5hd2FyZSBvZiB0aGUgZXhpc3RlbmNlIG9mIHRoZSBib3VuY2UgYnVmZmVyLgoKU28gd2Ug bmVlZCB0byB0aGluayBjYXJlZnVsbHkgb2YgbW1hcCgpIHZzIHVtZW0gcmVnaXN0ZXJpbmcuCgpU aGFua3MKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fClZp cnR1YWxpemF0aW9uIG1haWxpbmcgbGlzdApWaXJ0dWFsaXphdGlvbkBsaXN0cy5saW51eC1mb3Vu ZGF0aW9uLm9yZwpodHRwczovL2xpc3RzLmxpbnV4Zm91bmRhdGlvbi5vcmcvbWFpbG1hbi9saXN0 aW5mby92aXJ0dWFsaXphdGlvbg==