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=-15.1 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 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 3077AC433E0 for ; Tue, 26 Jan 2021 08:19:47 +0000 (UTC) Received: from hemlock.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 B47A220717 for ; Tue, 26 Jan 2021 08:19:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B47A220717 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 hemlock.osuosl.org (Postfix) with ESMTP id 2EE8887013; Tue, 26 Jan 2021 08:19:46 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from hemlock.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 5fjAN9vsVP1h; Tue, 26 Jan 2021 08:19:45 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by hemlock.osuosl.org (Postfix) with ESMTP id 93E7587006; Tue, 26 Jan 2021 08:19:45 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 782C1C08A1; Tue, 26 Jan 2021 08:19:45 +0000 (UTC) Received: from silver.osuosl.org (smtp3.osuosl.org [140.211.166.136]) by lists.linuxfoundation.org (Postfix) with ESMTP id 7517DC013A for ; Tue, 26 Jan 2021 08:19:44 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by silver.osuosl.org (Postfix) with ESMTP id 57FDA203E1 for ; Tue, 26 Jan 2021 08:19:44 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from silver.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 3YiCagc7JF+8 for ; Tue, 26 Jan 2021 08:19:43 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [63.128.21.124]) by silver.osuosl.org (Postfix) with ESMTPS id 4A6F420034 for ; Tue, 26 Jan 2021 08:19:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1611649182; 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=dMTvjaMSAfTTa27ylw0ds1j6FG5ed6ihblNq6KfLvCg=; b=ZTF1WMgsz+CtLWtGBHwdewP/0YghOztQ0R33ug6ha+rNxknOHxQI3xZaVPCVxsG2ikD+gA ayLCTTLRnY7zby9r8DO/wXDTaFtTk9ecNK0nAMevKxjTuYvwT2e9vY4XwkxMnqP6Egsn9S npwuUpZkwYC4i0hsRltQP0QCL0IgSwY= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-282-THLH8a-qP6-IH6UDIF3e1g-1; Tue, 26 Jan 2021 03:19:39 -0500 X-MC-Unique: THLH8a-qP6-IH6UDIF3e1g-1 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 mimecast-mx01.redhat.com (Postfix) with ESMTPS id 67674195D563; Tue, 26 Jan 2021 08:19:37 +0000 (UTC) Received: from [10.72.12.70] (ovpn-12-70.pek2.redhat.com [10.72.12.70]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9F9E560C47; Tue, 26 Jan 2021 08:19:26 +0000 (UTC) Subject: Re: [RFC v3 08/11] vduse: Introduce VDUSE - vDPA Device in Userspace To: Xie Yongji , mst@redhat.com, stefanha@redhat.com, sgarzare@redhat.com, parav@nvidia.com, bob.liu@oracle.com, hch@infradead.org, rdunlap@infradead.org, willy@infradead.org, viro@zeniv.linux.org.uk, axboe@kernel.dk, bcrl@kvack.org, corbet@lwn.net References: <20210119045920.447-1-xieyongji@bytedance.com> <20210119050756.600-1-xieyongji@bytedance.com> <20210119050756.600-2-xieyongji@bytedance.com> From: Jason Wang Message-ID: <1f419a24-cd53-bd73-5b8a-8ab5d976a490@redhat.com> Date: Tue, 26 Jan 2021 16:19:25 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20210119050756.600-2-xieyongji@bytedance.com> Content-Language: en-US X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Cc: linux-aio@kvack.org, netdev@vger.kernel.org, linux-fsdevel@vger.kernel.org, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org 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" Ck9uIDIwMjEvMS8xOSDkuIvljYgxOjA3LCBYaWUgWW9uZ2ppIHdyb3RlOgo+IFRoaXMgVkRVU0Ug ZHJpdmVyIGVuYWJsZXMgaW1wbGVtZW50aW5nIHZEUEEgZGV2aWNlcyBpbiB1c2Vyc3BhY2UuCj4g Qm90aCBjb250cm9sIHBhdGggYW5kIGRhdGEgcGF0aCBvZiB2RFBBIGRldmljZXMgd2lsbCBiZSBh YmxlIHRvCj4gYmUgaGFuZGxlZCBpbiB1c2Vyc3BhY2UuCj4KPiBJbiB0aGUgY29udHJvbCBwYXRo LCB0aGUgVkRVU0UgZHJpdmVyIHdpbGwgbWFrZSB1c2Ugb2YgbWVzc2FnZQo+IG1lY2huaXNtIHRv IGZvcndhcmQgdGhlIGNvbmZpZyBvcGVyYXRpb24gZnJvbSB2ZHBhIGJ1cyBkcml2ZXIKPiB0byB1 c2Vyc3BhY2UuIFVzZXJzcGFjZSBjYW4gdXNlIHJlYWQoKS93cml0ZSgpIHRvIHJlY2VpdmUvcmVw bHkKPiB0aG9zZSBjb250cm9sIG1lc3NhZ2VzLgo+Cj4gSW4gdGhlIGRhdGEgcGF0aCwgVkRVU0Vf SU9UTEJfR0VUX0ZEIGlvY3RsIHdpbGwgYmUgdXNlZCB0byBnZXQKPiB0aGUgZmlsZSBkZXNjcmlw dG9ycyByZWZlcnJpbmcgdG8gdkRQQSBkZXZpY2UncyBpb3ZhIHJlZ2lvbnMuIFRoZW4KPiB1c2Vy c3BhY2UgY2FuIHVzZSBtbWFwKCkgdG8gYWNjZXNzIHRob3NlIGlvdmEgcmVnaW9ucy4gQmVzaWRl cywKPiB0aGUgZXZlbnRmZCBtZWNoYW5pc20gaXMgdXNlZCB0byB0cmlnZ2VyIGludGVycnVwdCBj YWxsYmFja3MgYW5kCj4gcmVjZWl2ZSB2aXJ0cXVldWUga2lja3MgaW4gdXNlcnNwYWNlLgo+Cj4g U2lnbmVkLW9mZi1ieTogWGllIFlvbmdqaTx4aWV5b25namlAYnl0ZWRhbmNlLmNvbT4KPiAtLS0K PiAgIERvY3VtZW50YXRpb24vZHJpdmVyLWFwaS92ZHVzZS5yc3QgICAgICAgICAgICAgICAgIHwg ICA4NSArKwo+ICAgRG9jdW1lbnRhdGlvbi91c2Vyc3BhY2UtYXBpL2lvY3RsL2lvY3RsLW51bWJl ci5yc3QgfCAgICAxICsKPiAgIGRyaXZlcnMvdmRwYS9LY29uZmlnICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgIHwgICAgNyArCj4gICBkcml2ZXJzL3ZkcGEvTWFrZWZpbGUgICAgICAgICAg ICAgICAgICAgICAgICAgICAgICB8ICAgIDEgKwo+ICAgZHJpdmVycy92ZHBhL3ZkcGFfdXNlci9N YWtlZmlsZSAgICAgICAgICAgICAgICAgICAgfCAgICA1ICsKPiAgIGRyaXZlcnMvdmRwYS92ZHBh X3VzZXIvZXZlbnRmZC5jICAgICAgICAgICAgICAgICAgIHwgIDIyMSArKysrCj4gICBkcml2ZXJz L3ZkcGEvdmRwYV91c2VyL2V2ZW50ZmQuaCAgICAgICAgICAgICAgICAgICB8ICAgNDggKwo+ICAg ZHJpdmVycy92ZHBhL3ZkcGFfdXNlci9pb3ZhX2RvbWFpbi5jICAgICAgICAgICAgICAgfCAgNDI2 ICsrKysrKysKPiAgIGRyaXZlcnMvdmRwYS92ZHBhX3VzZXIvaW92YV9kb21haW4uaCAgICAgICAg ICAgICAgIHwgICA2OCArKwo+ICAgZHJpdmVycy92ZHBhL3ZkcGFfdXNlci92ZHVzZS5oICAgICAg ICAgICAgICAgICAgICAgfCAgIDYyICsKPiAgIGRyaXZlcnMvdmRwYS92ZHBhX3VzZXIvdmR1c2Vf ZGV2LmMgICAgICAgICAgICAgICAgIHwgMTIxNyArKysrKysrKysrKysrKysrKysrKwo+ICAgaW5j bHVkZS91YXBpL2xpbnV4L3ZkcGEuaCAgICAgICAgICAgICAgICAgICAgICAgICAgfCAgICAxICsK PiAgIGluY2x1ZGUvdWFwaS9saW51eC92ZHVzZS5oICAgICAgICAgICAgICAgICAgICAgICAgIHwg IDEyNSArKwo+ICAgMTMgZmlsZXMgY2hhbmdlZCwgMjI2NyBpbnNlcnRpb25zKCspCj4gICBjcmVh dGUgbW9kZSAxMDA2NDQgRG9jdW1lbnRhdGlvbi9kcml2ZXItYXBpL3ZkdXNlLnJzdAo+ICAgY3Jl YXRlIG1vZGUgMTAwNjQ0IGRyaXZlcnMvdmRwYS92ZHBhX3VzZXIvTWFrZWZpbGUKPiAgIGNyZWF0 ZSBtb2RlIDEwMDY0NCBkcml2ZXJzL3ZkcGEvdmRwYV91c2VyL2V2ZW50ZmQuYwo+ICAgY3JlYXRl IG1vZGUgMTAwNjQ0IGRyaXZlcnMvdmRwYS92ZHBhX3VzZXIvZXZlbnRmZC5oCj4gICBjcmVhdGUg bW9kZSAxMDA2NDQgZHJpdmVycy92ZHBhL3ZkcGFfdXNlci9pb3ZhX2RvbWFpbi5jCj4gICBjcmVh dGUgbW9kZSAxMDA2NDQgZHJpdmVycy92ZHBhL3ZkcGFfdXNlci9pb3ZhX2RvbWFpbi5oCj4gICBj cmVhdGUgbW9kZSAxMDA2NDQgZHJpdmVycy92ZHBhL3ZkcGFfdXNlci92ZHVzZS5oCj4gICBjcmVh dGUgbW9kZSAxMDA2NDQgZHJpdmVycy92ZHBhL3ZkcGFfdXNlci92ZHVzZV9kZXYuYwo+ICAgY3Jl YXRlIG1vZGUgMTAwNjQ0IGluY2x1ZGUvdWFwaS9saW51eC92ZHVzZS5oCgoKQnR3LCBpZiB5b3Ug Y291bGQgc3BsaXQgdGhpcyBpbnRvIHRocmVlIHBhcnRzOgoKMSkgaW92YSBkb21haW4KMikgdmR1 c2UgZGV2aWNlCjMpIGRvYwoKSXQgd291bGQgYmUgbW9yZSBlYXNpZXIgZm9yIHRoZSByZXZpZXdl cnMuCgpUaGFua3MKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fClZpcnR1YWxpemF0aW9uIG1haWxpbmcgbGlzdApWaXJ0dWFsaXphdGlvbkBsaXN0cy5saW51 eC1mb3VuZGF0aW9uLm9yZwpodHRwczovL2xpc3RzLmxpbnV4Zm91bmRhdGlvbi5vcmcvbWFpbG1h bi9saXN0aW5mby92aXJ0dWFsaXphdGlvbg==